HIGH- LINEAR DC AMPLIFIERS WITH SYMMETRIC STRUCTURE FOR MEASUREMENTS CONTROL SYSTEM

Abstract

Determining component of analog circuit engineering, is amplifier, separate niche among these devices is occupied by DC amplifiers(DCA), being the basic component of operational amplifiers, for analog and hybrid computers and measuring information systems [1]. Historically, first DCA were constructed on vacuum tubes [2]. As a results of application of approaches and principles of vacuum tube amplifiers on transistor- based amplifiers integrated transistor-based circuits of DCA, appeared in 60`s and 70`s resembled vacuum tube circuits.This considerably limited the achievements of potential possibilities within the limits of dynamic and static characteristics, since it did not allow to use frequency properties of transistors up to limiting frequency , and restricted the linearity of transfer characteristic and a number of other parameters.