Constant voltage output device

Details Constant voltage output device Constant voltage output device

1997-12-10

2000-07-18

Zweizig, Jeffrey

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327546, G06F 302

Patent

active

060912855

ABSTRACT:
A constant voltage output device has a field-effect transistor and a comparator. Between the output electrode of the field-effect transistor and ground, a first resistor, a second resistor, and a first diode are connected in series. Moreover, between the output electrode of the field-effect transistor and ground, a third resistor and a second diode are connected in series. The comparator compares the voltage at the node between the first and second resistors with the voltage at the node between the third resistor and the second diode, and feeds the comparison result to the gate of the field-effect transistor. At an output terminal appears a desired voltage that is determined by the ratio between the current capacities of the first and second diodes and by the ratio between the resistances of the first and second resistors.

REFERENCES:
patent: 4287439 (1981-09-01), Leuschner
patent: 4380706 (1983-04-01), Wrathall
patent: 4795961 (1989-01-01), Neidirf
patent: 4857823 (1989-08-01), Bitting
patent: 5061862 (1991-10-01), Tamagawa
patent: 5610506 (1997-03-01), McIntyre
patent: 5629611 (1997-05-01), McIntyre
patent: 5867013 (1999-02-01), Yu
patent: 5867056 (1999-02-01), Zoellick

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