Discuss Optimization of All Pass Filter Configurations with OTAS and VDVTAS in CMOS

Abstract

This research uses CMOS simulation to prove that all-pass filters designed using Operational Trans conductance Amplifiers (OTAs) and Voltage Differencing Voltage Trans conductance Amplifiers (VDVTAs) work together. In the recommended all pass filter arrangement, a VDVTA and OTAs form the basis of a first-order all pass filter. In the first configuration, a grounded capacitor and one VDVTA are used, in the second, two OTAs and one grounded capacitor. Among the many impressive features of the published designs are their low active and passive sensitivities, as well as their very low power consumption, bias voltage, and supply voltage (about 0.50 V). Because they allow for the manipulation of phase responses independently of signal amplitude, all-pass filters play an essential role in signal processing. In comparison to traditional amplifiers, OTAs and VDVTAs provide more flexible features and better performance indicators.