DocumentCode :
1473997
Title :
A silicon diode analogue multiplier
Author :
Deep, G.S. ; Viswanathan, T.R.
Volume :
34
Issue :
4
fYear :
1967
fDate :
10/1/1967 12:00:00 AM
Firstpage :
241
Lastpage :
246
Abstract :
The logarithmic nature of the voltage-current characteristics of silicon junction diodes is exploited to design an analogue multiplier. Four silicon junction diodes are used in conjunction with a differential operational amplifier in the multiplier circuit. The principle of operation, design considerations and techniques to compensate for temperature effects and unequal diode parameters are discussed. Methods of performing division and generation of special types of functions are outlined. Measurements on an experimental single quadrant multiplier show that an accuracy of multiplication of the order of 1% can be achieved. Long term temperature drift at the output is measured to be 2% per 10 degC change in ambient temperature. The bandwidth of the multiplier is directly dependent on the operational amplifier employed. With a Donner (Model 3400) amplifier, the bandwidth is measured to be about 200 Hz. An attractive feature of the circuit is that it lends itself for miniaturization with the advent of differential operational amplifiers in the integrated circuit form.
Keywords :
analogue computers; integrated circuits; logic and computing circuits; semiconductor diodes;
fLanguage :
English
Journal_Title :
Radio and Electronic Engineer
Publisher :
iet
ISSN :
0033-7722
Type :
jour
DOI :
10.1049/ree.1967.0090
Filename :
5267074
Link To Document :
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