Switching circuit of low power consumption

Details Switching circuit of low power consumption Switching circuit of low power consumption

1993-03-03

1994-11-01

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Utilizing three or more electrode solid-state device

327 77, 327309, H03K 1710

Patent

active

053610083

ABSTRACT:
In a switching circuit comprising an output field effect transistor having an output drain electrode connected to a power supply through a load resistor and an output gate electrode supplied with an input voltage, a reference field effect transistor has a reference drain electrode connected to the power supply through a reference resistor and a reference gate electrode supplied with the input voltage. Each of the output and the reference field effect transistors is made of a metal oxide semiconductor. A comparator has a load input terminal connected to a load node of the output drain electrode and the load resistor and a reference input terminal connected to a reference node of the reference drain electrode and the reference resistor. The comparator compares a load sensing voltage from the load node with a reference voltage from the reference node to produce a compare output voltage when the load sensing voltage is higher than the reference voltage. A bias power circuit supplies a bias voltage to the output gate electrode and the reference gate electrode. A limiting circuit supplies a limiting voltage to the output gate electrode and the reference gate electrode when the limiting circuit is supplied with the compare output voltage. The limiting voltage is lower than the bias voltage.

REFERENCES:
patent: 4540893 (1985-09-01), Bloomer
patent: 4672246 (1987-06-01), Donovan
patent: 5113089 (1992-05-01), Osawa

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