Temperature-compensated zener voltage reference

Details Temperature-compensated zener voltage reference Temperature-compensated zener voltage reference

1983-08-30

1985-12-31

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323907, 323231, G05F 500

Patent

active

045624003

ABSTRACT:
A precision voltage reference comprising an IC chip having a Zener diode connected to the input of an operational amplifier. Variations in output with temperature are minimized by selectively controlling the Zener current in accordance with temperature. The current is controlled by a resistive circuit including a thermistor connected in parallel with the Zener. A method of trimming the voltage reference is provided wherein an optimum quiescent operating current is determined based on voltage and current measurements at two different temperatures.

REFERENCES:
patent: 3916508 (1975-11-01), Conzelmann et al.
patent: 4352053 (1982-09-01), Oguchi et al.
patent: 4398142 (1983-08-01), Beasom

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