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Title: Log amplifier with pole-zero compensation

Abstract

A logarithmic amplifier circuit provides pole-zero compensation for improved stability and response time over 6-8 decades of input signal frequency. The amplifier circuit includes a first operational amplifier with a first feedback loop which includes a second, inverting operational amplifier in a second feedback loop. The compensated output signal is provided by the second operational amplifier with the log elements, i.e., resistors, and the compensating capacitors in each of the feedback loops having equal values so that each break point or pole is offset by a compensating break point or zero.

Inventors:
 [1]
  1. Downers Grove, IL
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
OSTI Identifier:
866105
Patent Number(s):
4634986
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G06 - COMPUTING G06G - ANALOGUE COMPUTERS
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
log; amplifier; pole-zero; compensation; logarithmic; circuit; provides; improved; stability; response; time; 6-8; decades; input; signal; frequency; operational; feedback; loop; inverting; compensated; output; provided; elements; resistors; compensating; capacitors; loops; equal; values; break; pole; offset; zero; circuit provides; feedback loop; output signal; input signal; response time; amplifier circuit; improved stability; operational amplifier; signal frequency; feedback loops; pole-zero compensation; /327/

Citation Formats

Brookshier, William. Log amplifier with pole-zero compensation. United States: N. p., 1987. Web.
Brookshier, William. Log amplifier with pole-zero compensation. United States.
Brookshier, William. Thu . "Log amplifier with pole-zero compensation". United States. https://www.osti.gov/servlets/purl/866105.
@article{osti_866105,
title = {Log amplifier with pole-zero compensation},
author = {Brookshier, William},
abstractNote = {A logarithmic amplifier circuit provides pole-zero compensation for improved stability and response time over 6-8 decades of input signal frequency. The amplifier circuit includes a first operational amplifier with a first feedback loop which includes a second, inverting operational amplifier in a second feedback loop. The compensated output signal is provided by the second operational amplifier with the log elements, i.e., resistors, and the compensating capacitors in each of the feedback loops having equal values so that each break point or pole is offset by a compensating break point or zero.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Patent:

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