OPERATIONAL TRANSRESISTANCE AMPLIFIER AND ITS APPLICATIONS

Abstract

Sinusoidal oscillators are crucial part of any electrical and electronic applications like AC machine control systems, measurement meters, medical equipment, communication modules, control & instrumentation systems etc. A single OTRA based sinusoidal oscillator having independent control on condition of oscillation and frequency of oscillation is realized. A quadrature phase oscillator is also presented. In any communication system oscillator is an inevitable block. Different modulation schemes namely DSB-SC, DSB-FC, PAM and one demodulation scheme (DSB-SC) have been realized using OTRA. All the circuits are implemented using OTRA and their workability is verified through PSPICE using 180nm process parameters. The supply voltages used are ±1.5V. All simulation results are found to be in closed agreement with the theoretical results.