Title :
A low-frequency selective amplifier
Author_Institution :
University of Illinois, Urbana, Illinois
Abstract :
A selective feedback amplifier which is useful. at sub-audio frequencies is described .It is shown that has the Same characteristic as a simple resonant circuit and that the selectivity is improved by an increase in gain. The measurements on an actual amplifier are presented; they show close agreement with the theory.
Keywords :
Bridge circuits; Feedback amplifiers; Feedback circuits; Filters; Gain measurement; Impedance; RLC circuits; Resonance; Resonant frequency; Stability;
Journal_Title :
Audio, Transactions of the IRE Professional Group on
DOI :
10.1109/T-SP.1953.28161
