Papers by Phamorn Silapan
This article presents a current-mode square rooting circuit employing 2 multiple output current f... more This article presents a current-mode square rooting circuit employing 2 multiple output current follower transconductance amplifiers (MO-CTFAs). The features of the proposed circuit are that; the magnitude of the output current can be linearly/electronically adjusted with wide input dynamic range; the output current is temperature-insensitive; the circuit description is very simple, consisting of merely two MO-CFTAs. Without any matching conditions
This article presents a new current-mode derivative PWM signal generator based on MO-CTTAs (Multi... more This article presents a new current-mode derivative PWM signal generator based on MO-CTTAs (Multiple output current through transconductance amplifiers). The circuit description is very simple, its construction consists of 2 MO-CTTAs and 1 grounded capacitor without any external resistor. The output frequency and amplitude can be independently and electronically adjusted. With mentioned features, it is very suitable to realize in a monolithic chip. The PSPICE simulation results are depicted, and agree well with the theoretical anticipation. The maximum power consumption is approximately 5.73mW at ±1.5V power supply.
This article presents a current-mode quadrature oscillator using current controlled current conve... more This article presents a current-mode quadrature oscillator using current controlled current conveyor transconductance amplifiers (CC-CCTAs) as active elements. The proposed circuit is realized from a lossy integrator and a lossy differentiator. The oscillation condition and oscillation frequency can be electronically controlled via input bias currents. The proposed oscillator can be applied to provide AM/ASK signals with the above major advantages. The circuit description is very simple, consisting of merely 2 CC-CCTAs and 2 grounded capacitors. By absent of any external resistors and using a few number of external passive components, the proposed circuit is then suitable for IC architecture. The proposed circuit, due to high output impedances, enabling easy cascading in current-mode signal processing. The PSPICE simulation results are depicted, and the given results agree well with the theoretical anticipation. The power consumption is approximately 3.06mW at ±1.5V supply voltages.
This article presents a current-mode square rooting circuit employing 2 multiple output current f... more This article presents a current-mode square rooting circuit employing 2 multiple output current follower transconductance amplifiers (MO-CTFAs). The features of the proposed circuit are that; the magnitude of the output current can be linearly/electronically adjusted with wide input dynamic range; the output current is temperature-insensitive; the circuit description is very simple, consisting of merely two MO-CFTAs. Without any matching conditions
This article presents a new current-mode derivative PWM signal generator based on MO-CTTAs (Multi... more This article presents a new current-mode derivative PWM signal generator based on MO-CTTAs (Multiple output current through transconductance amplifiers). The circuit description is very simple, its construction consists of 2 MO-CTTAs and 1 grounded capacitor without any external resistor. The output frequency and amplitude can be independently and electronically adjusted. With mentioned features, it is very suitable to realize in a monolithic chip. The PSPICE simulation results are depicted, and agree well with the theoretical anticipation. The maximum power consumption is approximately 5.73mW at ±1.5V power supply.
This article presents a current-mode quadrature oscillator using current controlled current conve... more This article presents a current-mode quadrature oscillator using current controlled current conveyor transconductance amplifiers (CC-CCTAs) as active elements. The proposed circuit is realized from a lossy integrator and a lossy differentiator. The oscillation condition and oscillation frequency can be electronically controlled via input bias currents. The proposed oscillator can be applied to provide AM/ASK signals with the above major advantages. The circuit description is very simple, consisting of merely 2 CC-CCTAs and 2 grounded capacitors. By absent of any external resistors and using a few number of external passive components, the proposed circuit is then suitable for IC architecture. The proposed circuit, due to high output impedances, enabling easy cascading in current-mode signal processing. The PSPICE simulation results are depicted, and the given results agree well with the theoretical anticipation. The power consumption is approximately 3.06mW at ±1.5V supply voltages.
This article presents a current-mode square rooting circuit employing 2 multiple output current f... more This article presents a current-mode square rooting circuit employing 2 multiple output current follower transconductance amplifiers (MO-CTFAs). The features of the proposed circuit are that; the magnitude of the output current can be linearly/electronically adjusted with wide input dynamic range; the output current is temperature-insensitive; the circuit description is very simple, consisting of merely two MO-CFTAs. Without any matching conditions
This article presents a new current-mode derivative PWM signal generator based on MO-CTTAs (Multi... more This article presents a new current-mode derivative PWM signal generator based on MO-CTTAs (Multiple output current through transconductance amplifiers). The circuit description is very simple, its construction consists of 2 MO-CTTAs and 1 grounded capacitor without any external resistor. The output frequency and amplitude can be independently and electronically adjusted. With mentioned features, it is very suitable to realize in a monolithic chip. The PSPICE simulation results are depicted, and agree well with the theoretical anticipation. The maximum power consumption is approximately 5.73mW at ±1.5V power supply.
This article presents a current-mode quadrature oscillator using current controlled current conve... more This article presents a current-mode quadrature oscillator using current controlled current conveyor transconductance amplifiers (CC-CCTAs) as active elements. The proposed circuit is realized from a lossy integrator and a lossy differentiator. The oscillation condition and oscillation frequency can be electronically controlled via input bias currents. The proposed oscillator can be applied to provide AM/ASK signals with the above major advantages. The circuit description is very simple, consisting of merely 2 CC-CCTAs and 2 grounded capacitors. By absent of any external resistors and using a few number of external passive components, the proposed circuit is then suitable for IC architecture. The proposed circuit, due to high output impedances, enabling easy cascading in current-mode signal processing. The PSPICE simulation results are depicted, and the given results agree well with the theoretical anticipation. The power consumption is approximately 3.06mW at ±1.5V supply voltages.
This article presents a current-mode square rooting circuit employing 2 multiple output current f... more This article presents a current-mode square rooting circuit employing 2 multiple output current follower transconductance amplifiers (MO-CTFAs). The features of the proposed circuit are that; the magnitude of the output current can be linearly/electronically adjusted with wide input dynamic range; the output current is temperature-insensitive; the circuit description is very simple, consisting of merely two MO-CFTAs. Without any matching conditions
This article presents a new current-mode derivative PWM signal generator based on MO-CTTAs (Multi... more This article presents a new current-mode derivative PWM signal generator based on MO-CTTAs (Multiple output current through transconductance amplifiers). The circuit description is very simple, its construction consists of 2 MO-CTTAs and 1 grounded capacitor without any external resistor. The output frequency and amplitude can be independently and electronically adjusted. With mentioned features, it is very suitable to realize in a monolithic chip. The PSPICE simulation results are depicted, and agree well with the theoretical anticipation. The maximum power consumption is approximately 5.73mW at ±1.5V power supply.
This article presents a current-mode quadrature oscillator using current controlled current conve... more This article presents a current-mode quadrature oscillator using current controlled current conveyor transconductance amplifiers (CC-CCTAs) as active elements. The proposed circuit is realized from a lossy integrator and a lossy differentiator. The oscillation condition and oscillation frequency can be electronically controlled via input bias currents. The proposed oscillator can be applied to provide AM/ASK signals with the above major advantages. The circuit description is very simple, consisting of merely 2 CC-CCTAs and 2 grounded capacitors. By absent of any external resistors and using a few number of external passive components, the proposed circuit is then suitable for IC architecture. The proposed circuit, due to high output impedances, enabling easy cascading in current-mode signal processing. The PSPICE simulation results are depicted, and the given results agree well with the theoretical anticipation. The power consumption is approximately 3.06mW at ±1.5V supply voltages.
This paper introduces a modified version of current feedback amplifier (CFA), called current cont... more This paper introduces a modified version of current feedback amplifier (CFA), called current controlled current feedback amplifier (CC-CFA), to extend usabilities of this active element in terms of electronic control-abilities and simpler circuit description of the element's applications. This modified element was realized by using a BiCMOS standard technology to reduce offset error phenomenon, the design configuration is systematically explained. The performances have been proven through PSPICE which is accordance with theoretical anticipations. In addition, application examples for a current-mode multiplier/divider, oscillator, grounded inductance simulator, filters, and amplifiers are included. The results are confirmed that the electrical characteristics are electronically tunable.
This article introduces a grounded capacitance multiplier employing current controlled current co... more This article introduces a grounded capacitance multiplier employing current controlled current conveyor transconductance amplifiers (CCCCTAs). The provided capacitor is a grounded element. Its outstanding feature is that the capacitive value can be electronically adjusted by input bias currents of the CCCCTA and is temperature-insensitive. The circuit construction comprises two CCCCTAs, cooperating with a grounded capacitor. The circuit performances are depicted through PSPICE simulations, they show good agreement to theoretical anticipation. Application as a fifth-order Chebyshev low-pass filter is included.
ABSTRACT This article presents a realization of a recently basic building block for analog signal... more ABSTRACT This article presents a realization of a recently basic building block for analog signal processing, namely fully-differential operation transconductance amplifier (FD-OTA) using the commercially available ICs (LT1228). The proposed element has very simple internal instruction. The performances are examined through PSpice simulations. The description include example as even order fully-differential biquadratic filter topology. They show good agreement as theoretically depicted.
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Papers by Phamorn Silapan