NONLINEAR DISTORTION IN FEEDBACK AMPLIFIERS
Abstract
Consider a feedback amplifier F with a nonlinear output device T sub o and an open loop amplifier A having the same gain and the same output device T sub o. If the gain of the forward amplifier Mu and feedback network Beta are independent of frequency, it is well known that under the usual conditions, the nonlinear distortion Zeta of F due to T sub o is related to the nonlinear distortion Zeta of A by Zeta = Zeta/(1+Mu Beta). In this paper we determine conditions under which a similar formula, namely Zeta = (1+Mu Beta) times Zeta, applies when Mu and Beta are strictly stable linear time invariant amplifiers. The interpretation o the formula is the following: Zeta is the function of time which is output of an amplifier whose gain is 1/ 91+Mu Beta) when Zeta is its inp t, and Zeta is the nonlinear distortion of the open loop amplifier A. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 14, 1961
- Accession Number
- AD0264679
Entities
People
- C.a. Desoer
Organizations
- University of California, Berkeley