Diagram 300 WOW! US Patent No 4,562,400 Line 22f1fa19c3k38 Electro Nanotubes Anode Cathode Formula Zener Diode 5g WOW SETI

Diagram 300 WOW! US Patent No 4,562,400 Line 22f1fa19c3k38 Electro Nanotubes Anode Cathode Formula Zener Diode 5g WOW SETI

Temperature-compensated zener voltage reference

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.

source: http://www.patentbuddy.com/Patent/4562400

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