Voltage regulator for generating a constant reference voltage wh

Details Voltage regulator for generating a constant reference voltage wh Voltage regulator for generating a constant reference voltage wh

1991-05-30

1993-02-02

Beha, Jr., William H.

Electricity: power supply or regulation systems

Output level responsive

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

323313, 323907, 257300, 257316, G05F 146, G05F 1567

Patent

active

051840618

ABSTRACT:
An improved voltage reference circuit is shown for use in analog integrated circuits including A/D and D/A converters. The voltage reference circuit comprises an operational amplifier having an non-inverting terminal connected to a capacitor. The inverting terminal of the op amp is connected to the op amp output terminal. The output terminal provides a constant reference voltage which is a function of the voltage charged in the capacitor. The capacitor includes a floating gate, an isolating layer, and a controlling gate which is used to charge (program) the capacitor to a fixed voltage. The capacitor structure is such that its charge is maintained constant over time independent of any temperature change. As a result, the voltage reference circuit prevents fluctuations in the output reference voltage throughout its operating period.

REFERENCES:
patent: 3390347 (1968-06-01), Jones et al.
patent: 4250445 (1981-02-01), Brokaw
patent: 4849684 (1989-07-01), Soantag et al.
patent: 5030848 (1991-07-01), Wyatt
Lee et al, Hardware Annealing in Analog VLSI Neurocomputing, Kluwer Academic Publishers, 1991, pp. 104-112.

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