Journal ArticleDOI
Selective Filters and Sinusoidal Oscillators Using CFA Transimpedance Pole
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TLDR
Using a single current feedback amplifier (CFA) device, two new variable frequency sinusoidal RC oscillators are presented and exhibit resonance characteristics at moderate Q-values under open-loop conditions.Abstract:
Using a single current feedback amplifier (CFA) device, two new variable frequency sinusoidal RC oscillators are presented. The transadmittance pole of the device (AD-844) has been utilized in the design for generating sine wave signals covering a range of 1 MHz≤f 0≤31 MHz. Under open-loop conditions, both circuits exhibit resonance characteristics at moderate Q-values (1≤Q≤9). These responses have been experimentally verified with hardware circuit implementation and PSPICE macromodel simulation.read more
Citations
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High-frequency log-domain current-mode multiphase sinusoidal oscillator
TL;DR: The proposed multiphase sinusoidal oscillator (MSO) can be instantaneously controlled over a very wide frequency range by controlling the current for the oscillation frequency and oscillation condition which indicates the proposed MSO's suitability in high-frequency applications.
Journal ArticleDOI
Voltage/Current-Mode Multifunction Filters Using One Current Feedback Amplifier and Grounded Capacitors
TL;DR: The proposed circuits offer the following features: no requirements for component matching conditions; low active and passive sensitivities; employing only grounded capacitors and the ability to obtain multifunction filters from the same circuit configuration.
Journal ArticleDOI
A novel Nth-order voltage-mode universal filter based on CMOS CFOA
TL;DR: A Nth-order universal filter based on Current Feedback Operational Amplifier (CFOA) is proposed that can realize the universal filter functions without changing circuit configuration, and the operating frequency of proposed filter circuit is at least 10 MHz.
Journal ArticleDOI
Single-CFA first-order allpass filter
Journal ArticleDOI
Sinh-Domain multiphase sinusoidal oscillator
TL;DR: A Multiphase Sinusoidal Oscillator (MSO) configuration derived by employing appropriate non-linear transconductors which implement lossy integrators in the Sinh-Domain is introduced in this paper.
References
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Journal ArticleDOI
Accurate CMOS-based current conveyors
TL;DR: An integrable circuit technique for implementing both positive and negative second-generation current conveyors (CCII) is described in this paper, where the proposed circuits consist of a differential pair, current sources, and current mirrors.
Journal ArticleDOI
Accurate and high output impedance current mirror suitable for CMOS current output stages
Ali Zeki,Hakan Kuntman +1 more
TL;DR: Comparisons have shown that, besides higher accuracy and output resistance, the proposed circuit has no residual error, but has a wider output voltage swing, a much higher PSRR, and an easier and more flexible design.
Journal ArticleDOI
Current-feedback amplifiers versus voltage operational amplifiers
TL;DR: In this paper, the main performance parameters of the current feedback opamp (CFOA) with those of a conventional voltage opamp were compared with a folded cascode VOA and the same power consumption was assumed for both amplifiers.
Journal ArticleDOI
Realisation of R-L and C-D impedances using a current feedback amplifier and its applications
S.-J. Liu,Yuh-Shyan Hwang +1 more
TL;DR: Using a current feedback amplifier (CFA), new series resistor-indicator and capacitor-frequency-dependent negative resistance configurations are proposed in this article. But their performance is limited.
Journal ArticleDOI
Multiphase sinusoidal oscillator using the CFOA pole
TL;DR: In this article, a multiphase sinusoidal oscillator using the parasitic poles of current feedback operational amplifiers (CFOAs) is presented, which can generate n signals which are equal in amplitude and equally spaced in phase.