This paper reports on an experimental investigation into the influence of current modulation on t... more This paper reports on an experimental investigation into the influence of current modulation on the properties of a vertical-cavity surface-emitting laser (VCSEL) with a direct square wave modulation. The optical output power response, as a function of the pumping current, modulation frequency, and amplitude, is measured for an 850 nm VCSEL. We demonstrate that modulation frequency and amplitude play important roles in reducing the VCSEL’s power consumption for optical generation. Indeed, even when the biasing current is below the static threshold, the VCSEL emits optical power under the square wave modulation. The power consumed by the device to generate light is significantly reduced to > 50%, which is below the threshold current, in response to both the modulation frequency and amplitude. An operating VCSEL device at low power is very desirable for less thermal effects, which are essential for a high-speed modulation bandwidth. Keywords—VCSELs, optical power generation, power ...
Non-orthogonal multiple access (NOMA) is being considered as a candidate to meet the expected tra... more Non-orthogonal multiple access (NOMA) is being considered as a candidate to meet the expected traffic demand growth in 5G and beyond 5G (5GB) networks. Due to the complexity of applying multiuser detection at the NOMA receiver, a number of works have suggested applying user-pairing to simplify dealing with all users as a whole. This paper addresses the effect of applying user-pairing on the performance of NOMA assisted system in general proposes three different user pairing approaches to examine which one is best for boosting the performance of multiuser NOMA system and making it reaches its potential. This paper evaluates the performance of NOMA system with organized (uniform), random, and distance-based user pairing schemes. Simulation results show that the organized pairing assisted NOMA scheme offers the best performance as compared to its pairing peer techniques in terms of the overall sum rate and the energy efficiency.
International journal of engineering research and technology, 2015
In this paper, the concept of Alamouti's transmit diversity technique in MIMO system is implement... more In this paper, the concept of Alamouti's transmit diversity technique in MIMO system is implemented based on Hardware Description Language (HDL), using Xilinx Field Programmable Gate Array (FPGA) .The proposed design based on Alamouti's transmit diversity scheme which is a space-time block code (STBC) with two transmit antennas and four receive antennas. The implementation demonstrates the space-time code in a baseband system. The encoding and decoding algorithms are implemented using VHDL, where the Virtex2P is used to complete the receiver part design theoretically. Finally the design MIMO systems are implemented successfully.
Single carrier frequency division multiple access (SC-FDMA) technique is one of the most importan... more Single carrier frequency division multiple access (SC-FDMA) technique is one of the most important technology used in communication systems. One of the main drawbacks of SC-FDMA systems is the high peak-to-average power ratio (PAPR) of the transmitted signal. To transmit signal with high PAPR requires an actual and large linear domain of the power amplifier (PA). In this work, a new partial windowing technique is suggested for further reducing the PAPR in both localized FDMA (LFDMA) and distributed FDMA (DFDMA) systems. The suggested method improves a PAPR reduction method of SC-FDMA depending on the Lonzo’s resampling technique. To reach an appropriate tradeoff between the complexity of system performances and PAPR reduction, some MATLAB simulations by comparison between the effect of conventional SC-FDMA and proposed windowing technique have been evaluated and analyzed. The simulation results show best performance of the proposed scheme as compared to competitive substitutes. The acquired results show that when number of sub-carriers set as 1024, the PAPR exceeds 9.8 dB accounts for only 0.1% of transmitted signals when using DFDMA, approximately. But when the proposed method set up, the PAPR exceeds 7.8 dB accounts for almost 0.1% of transmitted signals. In LFDMA the PAPR exceeds 9.5 dB accounts for only 0.1%, but when suggested technique applied, the PAPR exceeds 7.5 dB accounts for almost 0.1% of transmitted signals. It is feasible to achieve a gain of between 1 and 3 dB in terms of PAPR reduction depending on the suggested method. Furthermore, comparison with conventional technique in terms of PAPR shows that our technique is a good alternative that can be selected as a PAPR reduction technique for SC-FDMA in communication systems.
Periodicals of Engineering and Natural Sciences (PEN), Dec 30, 2021
Multiplier is one of the most inevitable arithmetic circuit in digital signal design. Multipliers... more Multiplier is one of the most inevitable arithmetic circuit in digital signal design. Multipliers dissipate high power and occupy significant amount of the die area. In this paper, a low-error architecture design of the pretruncated parallel multiplier is presented. The coefficients word length has been truncated to reduce the multiplier size. This truncation scaled down the gate count and shortened the critical paths of partial product array. The statistical errors of the designed multiplier are calculated for different pre-truncate values and compared. The multiplier is implemented using Stratix III, FPGA device. The post fitting report is presented in this paper, which shows a saving of 36.9 % in resources usage, and a reduction of 17 % in propagation time delay.
Bulletin of Electrical Engineering and Informatics
In this document, we focus on how to design cyclic redundancy check (CRC) circuits with different... more In this document, we focus on how to design cyclic redundancy check (CRC) circuits with different 5G polynomial divisor using very high-speed integrated circuit (VHSIC) hardware description language (VHDL) to integrate in field-programmable gate array (FPGA) suitable kit using a suitable design code. The different between designed circuits came from the different of data size according to polynomials requirements conditions since there are huge data size in 5G system that required divide it with suitable method and then implemented the required circuit. CRC code as a polar code and short low density parity check (LDPC) is proposed in 5G new radio (NR) systems, CRC properties to divided data and CRC cod make it particularly very useful for codes with higher data rate and longer lengths, and for codes with low data rates and small length as an error detection method. The CRC encoder circuit (transmitter side) and CRC decoder circuit (receiver side) with different polynomial and data s...
Periodicals of Engineering and Natural Sciences (PEN), 2021
In general, the oscillator is a device that used in most circuits and system of electronics, elec... more In general, the oscillator is a device that used in most circuits and system of electronics, electrical, and telecommunications. There are several kinds of oscillator contingent on frequency band use in a submission such as microwave, audio, and radio frequency. LC oscillator is one of the greatest mutual categories of oscillators, the applications of this oscillator was seemed to be increasing in modern devices, for actual high and very high frequencies to meet the speedy growth of progressive knowledge. That can be secondhand for radio frequency (RF), its productivity signal is frequently applied at the basis of radio communication classification in furthermost applications. In this paper, a designed Colpitts oscillator is covered from voltage amplifier with LC container. This strategy is done by two approaches. Primarily, is approved out exploitation hypothetical scheming. The subordinate is supported out exploitation imitation (Multisim 13). There are two proposal types of circuits the first for generate signal frequencies 0.5MHz,1MHZ,10MHz,20MHz,50MHz &100MHz, the second for generate signal frequencies 4.963MHZ, 5.031MHZ, and 5.756MHz respectively. The consequence is realized to be very hopeful.
Periodicals of Engineering and Natural Sciences (PEN), 2021
Multiplier is one of the most inevitable arithmetic circuit in digital signal design. Multipliers... more Multiplier is one of the most inevitable arithmetic circuit in digital signal design. Multipliers dissipate high power and occupy significant amount of the die area. In this paper, a low-error architecture design of the pretruncated parallel multiplier is presented. The coefficients word length has been truncated to reduce the multiplier size. This truncation scaled down the gate count and shortened the critical paths of partial product array. The statistical errors of the designed multiplier are calculated for different pre-truncate values and compared. The multiplier is implemented using Stratix III, FPGA device. The post fitting report is presented in this paper, which shows a saving of 36.9 % in resources usage, and a reduction of 17 % in propagation time delay.
The use of multiple transmit and receive antennas (MIMO system) is widely accepted in recent year... more The use of multiple transmit and receive antennas (MIMO system) is widely accepted in recent years, as a promising technology for future wireless communication, to achieve higher data rates independently of transmission power and bandwidth, with improve system reliability through increasing diversity. This research presents the design and implementation of a multiple antenna wireless communications system using Xilinx Field Programmable Gate Array (FPGA) .The proposed design based on Alamouti’s transmit diversity scheme which is a space-time block code (STBC) with two transmit antennas and an arbitrary number of receive antennas. The implementation demonstrates the space-time code in a baseband system with two antennas for transmitter and receiver. The encoding and decoding algorithms are implemented using VHDL, Spartan 3A /3AN is used to implement transmitter part, where the Virtex2P is used to complete the receiver part design theoretically. Finally the design MIMO systems are imp...
Indonesian Journal of Electrical Engineering and Computer Science, 2021
The massive MIMO system is one of the main technologies in the fifth generation (5G) of telecommu... more The massive MIMO system is one of the main technologies in the fifth generation (5G) of telecommunication systems, also recognized as a highly large-scale system. Constantly in massive MIMO systems, the base station (BS) is provided with a large number of antennas, and this large number of antennas need high-quantization resolution levels analog-to-digital converters (ADCs). In this situation, there will be more power consumption and hardware costs. This paper presents the simulation performance of a suggested method to investigate and analyze the effects of different quantization resolution levels of ADCs on the bit error rate (BER) performance of massive MIMO system under different operating scenarios using MATLAB software. The results show that the SNR exceeds 12 dB accounts for only 0.001% of BER signals when the number of antennas 60 with low quantization a 2 bits’ levels ADCs, approximately. But when the antenna number rises to 300, the SNR exceeds 12 dB accounts for almost 0....
Single carrier frequency division multiple access (SC-FDMA) technique is one of the most importan... more Single carrier frequency division multiple access (SC-FDMA) technique is one of the most important technology used in communication systems. One of the main drawbacks of SC-FDMA systems is the high peak-to-average power ratio (PAPR) of the transmitted signal. To transmit signal with high PAPR requires an actual and large linear domain of the power amplifier (PA). In this work, a new partial windowing technique is suggested for further reducing the PAPR in both localized FDMA (LFDMA) and distributed FDMA (DFDMA) systems. The suggested method improves a PAPR reduction method of SC-FDMA depending on the Lonzo’s resampling technique. To reach an appropriate tradeoff between the complexity of system performances and PAPR reduction, some MATLAB simulations by comparison between the effect of conventional SC-FDMA and proposed windowing technique have been evaluated and analyzed. The simulation results show best performance of the proposed scheme as compared to competitive substitutes. The acquired results show that when number of sub-carriers set as 1024, the PAPR exceeds 9.8 dB accounts for only 0.1% of transmitted signals when using DFDMA, approximately. But when the proposed method set up, the PAPR exceeds 7.8 dB accounts for almost 0.1% of transmitted signals. In LFDMA the PAPR exceeds 9.5 dB accounts for only 0.1%, but when suggested technique applied, the PAPR exceeds 7.5 dB accounts for almost 0.1% of transmitted signals. It is feasible to achieve a gain of between 1 and 3 dB in terms of PAPR reduction depending on the suggested method. Furthermore, comparison with conventional technique in terms of PAPR shows that our technique is a good alternative that can be selected as a PAPR reduction technique for SC-FDMA in communication systems.
International Journal on Engineering Applications (IREA), 2020
The inverse kinematics solution of robotic manipulator based on Neural Network is presented in th... more The inverse kinematics solution of robotic manipulator based on Neural Network is presented in this paper. The problem in robotics manipulators is Inverse kinematics for PUMA robotics. The structure of joint for the manipulator is not easy if traditional solutions such as algebraic, geometric, and iterative are inadequate. The proposed method yields precise and multiple solutions and it is suitable and comfortable for real – time applications. The neural network is used to solve the inverse kinematics for the arm of robotics 6-dof. This approach is essential to calculate the end-effector in space Cartesian for each joint. The identification will be done in each joint for PUMA by neural network and PID controller will be applied on each joint to get the response; then, the reference input is done by tuning the values of coefficients of PID.
The oscillator is a form of frequency generators which can be generate a sinusoidal wave with con... more The oscillator is a form of frequency generators which can be generate a sinusoidal wave with constant frequency and amplitude. The frequency oscillator can be considered as a one of basic circuits, which must be existing in most electrical, electronic, communication circuits and systems. In this paper, a proposed design of sine wave oscillator type RC phase shift has been performed using three approaches. The first approach proposed design is done theoretically using the basic theorems used to generate oscillations, such as the condition of oscillation criteria. Secondly it is done using simulation technique (multisim11). Thirdly the simulated design is implemented practically using single operational amplifier with passive elements such as resistors & capacitors. All the obtained results from the above three approaches (3.800 kHz, 3.510 kHz & 3.600 kHz respectively) are seems to be equal approximately. These obtained results from the designed oscillator were very encouraging. Key Word: RC, OP-AMP, Phase Shift Oscillator.
International Journal of Electrical and Computer Engineering (IJECE), 2020
Frequency oscillator is one of the basic devices that can be used in most electrical, electronics... more Frequency oscillator is one of the basic devices that can be used in most electrical, electronics and communications circuits and systems. There are many types of oscillators depending on frequency range used in an application such as audio, radio and microwave. The needed was appeared to use high and very high frequencies to make the rapid development of advanced technology Colpitts oscillator is one of the most common types of oscillator, it can be used for radio frequency (RF), that its output signal is often utilized at the basic of a wireless communication system in most application. In this research, a Colpitts oscillator is comprised from a bipolar junction transistor (BJT) amplifier with LC tank. This design is carrying out with a known Barkhausen criterion for oscillation. Firstly, is carried out using theoretical calculation. The secondary is carried out using simulation (Multisim 13). All the obtained result from the above two approaches are 10 MHz and 9.745 MHz respectiv...
This paper reports on an experimental investigation into the influence of current modulation on t... more This paper reports on an experimental investigation into the influence of current modulation on the properties of a vertical-cavity surface-emitting laser (VCSEL) with a direct square wave modulation. The optical output power response, as a function of the pumping current, modulation frequency, and amplitude, is measured for an 850 nm VCSEL. We demonstrate that modulation frequency and amplitude play important roles in reducing the VCSEL’s power consumption for optical generation. Indeed, even when the biasing current is below the static threshold, the VCSEL emits optical power under the square wave modulation. The power consumed by the device to generate light is significantly reduced to > 50%, which is below the threshold current, in response to both the modulation frequency and amplitude. An operating VCSEL device at low power is very desirable for less thermal effects, which are essential for a high-speed modulation bandwidth. Keywords—VCSELs, optical power generation, power ...
Non-orthogonal multiple access (NOMA) is being considered as a candidate to meet the expected tra... more Non-orthogonal multiple access (NOMA) is being considered as a candidate to meet the expected traffic demand growth in 5G and beyond 5G (5GB) networks. Due to the complexity of applying multiuser detection at the NOMA receiver, a number of works have suggested applying user-pairing to simplify dealing with all users as a whole. This paper addresses the effect of applying user-pairing on the performance of NOMA assisted system in general proposes three different user pairing approaches to examine which one is best for boosting the performance of multiuser NOMA system and making it reaches its potential. This paper evaluates the performance of NOMA system with organized (uniform), random, and distance-based user pairing schemes. Simulation results show that the organized pairing assisted NOMA scheme offers the best performance as compared to its pairing peer techniques in terms of the overall sum rate and the energy efficiency.
International journal of engineering research and technology, 2015
In this paper, the concept of Alamouti's transmit diversity technique in MIMO system is implement... more In this paper, the concept of Alamouti's transmit diversity technique in MIMO system is implemented based on Hardware Description Language (HDL), using Xilinx Field Programmable Gate Array (FPGA) .The proposed design based on Alamouti's transmit diversity scheme which is a space-time block code (STBC) with two transmit antennas and four receive antennas. The implementation demonstrates the space-time code in a baseband system. The encoding and decoding algorithms are implemented using VHDL, where the Virtex2P is used to complete the receiver part design theoretically. Finally the design MIMO systems are implemented successfully.
Single carrier frequency division multiple access (SC-FDMA) technique is one of the most importan... more Single carrier frequency division multiple access (SC-FDMA) technique is one of the most important technology used in communication systems. One of the main drawbacks of SC-FDMA systems is the high peak-to-average power ratio (PAPR) of the transmitted signal. To transmit signal with high PAPR requires an actual and large linear domain of the power amplifier (PA). In this work, a new partial windowing technique is suggested for further reducing the PAPR in both localized FDMA (LFDMA) and distributed FDMA (DFDMA) systems. The suggested method improves a PAPR reduction method of SC-FDMA depending on the Lonzo’s resampling technique. To reach an appropriate tradeoff between the complexity of system performances and PAPR reduction, some MATLAB simulations by comparison between the effect of conventional SC-FDMA and proposed windowing technique have been evaluated and analyzed. The simulation results show best performance of the proposed scheme as compared to competitive substitutes. The acquired results show that when number of sub-carriers set as 1024, the PAPR exceeds 9.8 dB accounts for only 0.1% of transmitted signals when using DFDMA, approximately. But when the proposed method set up, the PAPR exceeds 7.8 dB accounts for almost 0.1% of transmitted signals. In LFDMA the PAPR exceeds 9.5 dB accounts for only 0.1%, but when suggested technique applied, the PAPR exceeds 7.5 dB accounts for almost 0.1% of transmitted signals. It is feasible to achieve a gain of between 1 and 3 dB in terms of PAPR reduction depending on the suggested method. Furthermore, comparison with conventional technique in terms of PAPR shows that our technique is a good alternative that can be selected as a PAPR reduction technique for SC-FDMA in communication systems.
Periodicals of Engineering and Natural Sciences (PEN), Dec 30, 2021
Multiplier is one of the most inevitable arithmetic circuit in digital signal design. Multipliers... more Multiplier is one of the most inevitable arithmetic circuit in digital signal design. Multipliers dissipate high power and occupy significant amount of the die area. In this paper, a low-error architecture design of the pretruncated parallel multiplier is presented. The coefficients word length has been truncated to reduce the multiplier size. This truncation scaled down the gate count and shortened the critical paths of partial product array. The statistical errors of the designed multiplier are calculated for different pre-truncate values and compared. The multiplier is implemented using Stratix III, FPGA device. The post fitting report is presented in this paper, which shows a saving of 36.9 % in resources usage, and a reduction of 17 % in propagation time delay.
Bulletin of Electrical Engineering and Informatics
In this document, we focus on how to design cyclic redundancy check (CRC) circuits with different... more In this document, we focus on how to design cyclic redundancy check (CRC) circuits with different 5G polynomial divisor using very high-speed integrated circuit (VHSIC) hardware description language (VHDL) to integrate in field-programmable gate array (FPGA) suitable kit using a suitable design code. The different between designed circuits came from the different of data size according to polynomials requirements conditions since there are huge data size in 5G system that required divide it with suitable method and then implemented the required circuit. CRC code as a polar code and short low density parity check (LDPC) is proposed in 5G new radio (NR) systems, CRC properties to divided data and CRC cod make it particularly very useful for codes with higher data rate and longer lengths, and for codes with low data rates and small length as an error detection method. The CRC encoder circuit (transmitter side) and CRC decoder circuit (receiver side) with different polynomial and data s...
Periodicals of Engineering and Natural Sciences (PEN), 2021
In general, the oscillator is a device that used in most circuits and system of electronics, elec... more In general, the oscillator is a device that used in most circuits and system of electronics, electrical, and telecommunications. There are several kinds of oscillator contingent on frequency band use in a submission such as microwave, audio, and radio frequency. LC oscillator is one of the greatest mutual categories of oscillators, the applications of this oscillator was seemed to be increasing in modern devices, for actual high and very high frequencies to meet the speedy growth of progressive knowledge. That can be secondhand for radio frequency (RF), its productivity signal is frequently applied at the basis of radio communication classification in furthermost applications. In this paper, a designed Colpitts oscillator is covered from voltage amplifier with LC container. This strategy is done by two approaches. Primarily, is approved out exploitation hypothetical scheming. The subordinate is supported out exploitation imitation (Multisim 13). There are two proposal types of circuits the first for generate signal frequencies 0.5MHz,1MHZ,10MHz,20MHz,50MHz &100MHz, the second for generate signal frequencies 4.963MHZ, 5.031MHZ, and 5.756MHz respectively. The consequence is realized to be very hopeful.
Periodicals of Engineering and Natural Sciences (PEN), 2021
Multiplier is one of the most inevitable arithmetic circuit in digital signal design. Multipliers... more Multiplier is one of the most inevitable arithmetic circuit in digital signal design. Multipliers dissipate high power and occupy significant amount of the die area. In this paper, a low-error architecture design of the pretruncated parallel multiplier is presented. The coefficients word length has been truncated to reduce the multiplier size. This truncation scaled down the gate count and shortened the critical paths of partial product array. The statistical errors of the designed multiplier are calculated for different pre-truncate values and compared. The multiplier is implemented using Stratix III, FPGA device. The post fitting report is presented in this paper, which shows a saving of 36.9 % in resources usage, and a reduction of 17 % in propagation time delay.
The use of multiple transmit and receive antennas (MIMO system) is widely accepted in recent year... more The use of multiple transmit and receive antennas (MIMO system) is widely accepted in recent years, as a promising technology for future wireless communication, to achieve higher data rates independently of transmission power and bandwidth, with improve system reliability through increasing diversity. This research presents the design and implementation of a multiple antenna wireless communications system using Xilinx Field Programmable Gate Array (FPGA) .The proposed design based on Alamouti’s transmit diversity scheme which is a space-time block code (STBC) with two transmit antennas and an arbitrary number of receive antennas. The implementation demonstrates the space-time code in a baseband system with two antennas for transmitter and receiver. The encoding and decoding algorithms are implemented using VHDL, Spartan 3A /3AN is used to implement transmitter part, where the Virtex2P is used to complete the receiver part design theoretically. Finally the design MIMO systems are imp...
Indonesian Journal of Electrical Engineering and Computer Science, 2021
The massive MIMO system is one of the main technologies in the fifth generation (5G) of telecommu... more The massive MIMO system is one of the main technologies in the fifth generation (5G) of telecommunication systems, also recognized as a highly large-scale system. Constantly in massive MIMO systems, the base station (BS) is provided with a large number of antennas, and this large number of antennas need high-quantization resolution levels analog-to-digital converters (ADCs). In this situation, there will be more power consumption and hardware costs. This paper presents the simulation performance of a suggested method to investigate and analyze the effects of different quantization resolution levels of ADCs on the bit error rate (BER) performance of massive MIMO system under different operating scenarios using MATLAB software. The results show that the SNR exceeds 12 dB accounts for only 0.001% of BER signals when the number of antennas 60 with low quantization a 2 bits’ levels ADCs, approximately. But when the antenna number rises to 300, the SNR exceeds 12 dB accounts for almost 0....
Single carrier frequency division multiple access (SC-FDMA) technique is one of the most importan... more Single carrier frequency division multiple access (SC-FDMA) technique is one of the most important technology used in communication systems. One of the main drawbacks of SC-FDMA systems is the high peak-to-average power ratio (PAPR) of the transmitted signal. To transmit signal with high PAPR requires an actual and large linear domain of the power amplifier (PA). In this work, a new partial windowing technique is suggested for further reducing the PAPR in both localized FDMA (LFDMA) and distributed FDMA (DFDMA) systems. The suggested method improves a PAPR reduction method of SC-FDMA depending on the Lonzo’s resampling technique. To reach an appropriate tradeoff between the complexity of system performances and PAPR reduction, some MATLAB simulations by comparison between the effect of conventional SC-FDMA and proposed windowing technique have been evaluated and analyzed. The simulation results show best performance of the proposed scheme as compared to competitive substitutes. The acquired results show that when number of sub-carriers set as 1024, the PAPR exceeds 9.8 dB accounts for only 0.1% of transmitted signals when using DFDMA, approximately. But when the proposed method set up, the PAPR exceeds 7.8 dB accounts for almost 0.1% of transmitted signals. In LFDMA the PAPR exceeds 9.5 dB accounts for only 0.1%, but when suggested technique applied, the PAPR exceeds 7.5 dB accounts for almost 0.1% of transmitted signals. It is feasible to achieve a gain of between 1 and 3 dB in terms of PAPR reduction depending on the suggested method. Furthermore, comparison with conventional technique in terms of PAPR shows that our technique is a good alternative that can be selected as a PAPR reduction technique for SC-FDMA in communication systems.
International Journal on Engineering Applications (IREA), 2020
The inverse kinematics solution of robotic manipulator based on Neural Network is presented in th... more The inverse kinematics solution of robotic manipulator based on Neural Network is presented in this paper. The problem in robotics manipulators is Inverse kinematics for PUMA robotics. The structure of joint for the manipulator is not easy if traditional solutions such as algebraic, geometric, and iterative are inadequate. The proposed method yields precise and multiple solutions and it is suitable and comfortable for real – time applications. The neural network is used to solve the inverse kinematics for the arm of robotics 6-dof. This approach is essential to calculate the end-effector in space Cartesian for each joint. The identification will be done in each joint for PUMA by neural network and PID controller will be applied on each joint to get the response; then, the reference input is done by tuning the values of coefficients of PID.
The oscillator is a form of frequency generators which can be generate a sinusoidal wave with con... more The oscillator is a form of frequency generators which can be generate a sinusoidal wave with constant frequency and amplitude. The frequency oscillator can be considered as a one of basic circuits, which must be existing in most electrical, electronic, communication circuits and systems. In this paper, a proposed design of sine wave oscillator type RC phase shift has been performed using three approaches. The first approach proposed design is done theoretically using the basic theorems used to generate oscillations, such as the condition of oscillation criteria. Secondly it is done using simulation technique (multisim11). Thirdly the simulated design is implemented practically using single operational amplifier with passive elements such as resistors & capacitors. All the obtained results from the above three approaches (3.800 kHz, 3.510 kHz & 3.600 kHz respectively) are seems to be equal approximately. These obtained results from the designed oscillator were very encouraging. Key Word: RC, OP-AMP, Phase Shift Oscillator.
International Journal of Electrical and Computer Engineering (IJECE), 2020
Frequency oscillator is one of the basic devices that can be used in most electrical, electronics... more Frequency oscillator is one of the basic devices that can be used in most electrical, electronics and communications circuits and systems. There are many types of oscillators depending on frequency range used in an application such as audio, radio and microwave. The needed was appeared to use high and very high frequencies to make the rapid development of advanced technology Colpitts oscillator is one of the most common types of oscillator, it can be used for radio frequency (RF), that its output signal is often utilized at the basic of a wireless communication system in most application. In this research, a Colpitts oscillator is comprised from a bipolar junction transistor (BJT) amplifier with LC tank. This design is carrying out with a known Barkhausen criterion for oscillation. Firstly, is carried out using theoretical calculation. The secondary is carried out using simulation (Multisim 13). All the obtained result from the above two approaches are 10 MHz and 9.745 MHz respectiv...
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Papers by Khalid Humood