Apparatus and method for a temperature compensated reference vol

Details Apparatus and method for a temperature compensated reference vol Apparatus and method for a temperature compensated reference vol

1985-08-15

1987-05-26

Wong, Peter S.

Electricity: power supply or regulation systems

In shunt with source or load

Using diode

323354, 323369, 323907, G05F 318, G05F 1613

Patent

active

046689036

ABSTRACT:
A voltage reference supply circuit is described that provides temperature compensation over a wide range of temperatures. The circuit includes a plurality of thermistor temperature dependent elements and these thermistor elements are utilized to compensate for the variation in the reference potential voltage of the Zener diode. The compensation is provided by determining the output voltage as a function of the circuit parameters and by varying pre-established resistive values in known ranges until the variations in the output voltage with temperature have been reduced below a predetermined value over the entire prescribed temperature range. Using this procedure, a variation in output voltage over the temperature range of -55.degree. C. to +125.degree. C. can be held within 50 parts per million.

REFERENCES:
patent: 4313083 (1982-01-01), Gilbert et al.
patent: 4315209 (1982-02-01), Schmoock
patent: 4562400 (1985-12-01), Narasimhan

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