LOG_ANTILOG_DIVIDER

Published:2009/7/14 4:16:00 Author:May | From:SeekIC

Can be used in applications where both numerator and denominator are restricted to single polarity (to onequadrant),Input variables X, Y andZ are applied to three indeρendent transd log amplifiers(A1- Q1A, A2- Q2A, and A3-Q2B ).Outputs of logamps are proportional to logarithms of input variables. R4, in feedback circuit of A4 converts collector current of Q1B to output voltage proportional to VZ VY / VX. Circuit performs multiplication and division simultaneously and with equal accuracy. Overall nonlinearity can be as low as 0.05%. Article gives design equations.-L.Counts and D. Sheingold, Analog Divider:WhatChoice Do You Have?, EDN Magazine, May 5, 1974, p 55-61.



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