An efficient method to improve amplifier accuracy

Abstract

The gain and phase error of amplifiers can be measured precisely and consequently reduced with at least one order of magnitude in the frequency range of 0...100 kHz. Better performance can be achieved in the 0...1 kHz range, where gain error can be reduced below 10 ppm. No precision component or instrument is needed. Implementation of the method is simple, inexpensive and suitable for industrial applications.