Abstract
Five new electronically-controllable second order current-mode sinusoidal oscillators using three mul-ti-output operational transconductance amplifiers (MO-OTAs) and two grounded capacitors (GC) have been presented. Simulation results are included to confirm the theoretical analysis based upon CMOS OTAs implementable in 0.5 µm technology.
Highlights
Tsukutani, Sumi and Fukui [1] presented two current-mode OTA-C sinusoidal oscillators each of which employs three multioutput operational transconductance amplifiers (MO-OTAs) and three grounded capacitors (GC) and provides three explicit current outputs
Whereas one of the circuits of [1] does not have independent controllability of the condition of oscillation (CO) and the frequency of oscillation (FO) through different transconductances, on the other hand, both the circuits employ three GCs and are not canonic
The main objective of this paper is to present five new current-mode electronically-controllable second order sinusoidal oscillators which use only three MO-OTAs like the circuits of [1] but in contrast to the circuits of [1], the proposed circuits use no more than two GCs and are capable of providing a non-interacting and independent control of both CO and FO and in addition provide quadrature outputs which find numerous applications
Summary
Tsukutani, Sumi and Fukui [1] presented two current-mode OTA-C sinusoidal oscillators each of which employs three MO-OTAs and three grounded capacitors (GC) and provides three explicit current outputs. Whereas one of the circuits of [1] does not have independent controllability of the condition of oscillation (CO) and the frequency of oscillation (FO) through different transconductances (which is a desirable and an expected property which one likes to see in any OTA-C oscillator), on the other hand, both the circuits employ three GCs and are not canonic. The main objective of this paper is to present five new current-mode electronically-controllable second order sinusoidal oscillators which use only three MO-OTAs like the circuits of [1] but in contrast to the circuits of [1], the proposed circuits use no more than two GCs and are capable of providing a non-interacting and independent control of both CO and FO and in addition provide quadrature outputs which find numerous applications (for instance, in communications for quadrature mixers and single-sideband generators and in instrumentation for vector generator or selective voltmeters [2] etc.).
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