DocumentCode
796468
Title
A New Temperature Compensating Method for Logarithmic Amplifier
Author
Kawashima, Katsuhiko
Author_Institution
Applied Physics Department Central Research Laboratory, Mitsubishi Electric Corporation Amagasaki, Japan
Volume
17
Issue
5
fYear
1970
Firstpage
25
Lastpage
32
Abstract
A new method of temperature compensation for a dc logarithmic amplifier is presented. By this method temperature effect on both parallel shift and slope variance of log I vs. VBE curve can be compensated easily by using only one compensating resistor of copper wire wound type. (hereafter called parallel and slope compensations.) An absolute compensation condition can be determined for each type of logarithmic transistors, like silicon NPN, germanium PNP irrespective of current measuring range. The temperature dependence of the logarithmic amplifier is reduced to 0.01 decade for the temperature range from 0°C to 50°C and the current range from 10-11 to 10-3A.
Keywords
Circuits; Copper; Current measurement; Equations; Optical amplifiers; Resistors; Temperature dependence; Voltage; Wire; Wounds;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/TNS.1970.4325747
Filename
4325747
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