Solid state current sensing circuit and protection circuit

Details Solid state current sensing circuit and protection circuit Solid state current sensing circuit and protection circuit

1989-01-27

1991-04-16

Beha, Jr., William H.

Electricity: power supply or regulation systems

Self-regulating

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

323316, 361 93, G05F 156, G05F 326

Patent

active

050085867

ABSTRACT:
A current sensing circuit for sensing a main current flowing through a power semiconductor element or elements, by utilizing a second current which is small in magnitude compared to the main current and varies depending on the main current, and sensing the second current through a current mirror circuit as a bias current of a differential circuit, and a function of sensing the temperature of the semiconductor element being afforded to the current sensing circuit through selection of a bias voltage.

REFERENCES:
patent: 4435678 (1984-03-01), Joseph et al.
patent: 4567537 (1986-01-01), Kalkhof
patent: 4739246 (1988-04-01), Thompson
patent: 4792750 (1988-12-01), Yan
patent: 4820968 (1989-04-01), Wrathall
Taub, "Current Threshold Circuit," IBM Tech. Discl. Bul., vol. 17, No. 3, p. 750, Aug. 1974.

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