Semiconductor integrated circuit

Details Semiconductor integrated circuit Semiconductor integrated circuit

1996-07-01

1997-10-07

Berhane, Adolf

Electricity: power supply or regulation systems

Self-regulating

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

323315, 307 101, 280734, G05F 308, G05F 326, B60R 2132

Patent

active

056752423

ABSTRACT:
A semiconductor integrated circuit is disclosed in which a power MOSFET supplies a squib of automobile air bag systems with load current. The power MOSFET Q.sub.1 provides squib Z.sub.L with the load current, and load current signal which outputs from shunt resistor R.sub.s is provided an operational amplifier consisting of transistors Q.sub.4 -Q.sub.10 with a negative feedback signal, so that the load current to be supplied to the squib Z.sub.L is restricted. The negative feedback operation is interrupted by load current function interruption signal which inputs to terminal T.sub.6. A circuit which consists of two current mirror circuits composed of transistors Q.sub.4 -Q.sub.10 and constant current source I.sub.4 supplies the operational amplifier with constant current to interrupt the feedback operation.

REFERENCES:
patent: 4914317 (1990-04-01), Agiman
patent: 5158323 (1992-10-01), Yamamoto et al.
patent: 5262713 (1993-11-01), Agiman
patent: 5311065 (1994-05-01), Kondo
patent: 5339019 (1994-08-01), Benz
patent: 5442244 (1995-08-01), Furui
patent: 5465041 (1995-11-01), Sanders et al.

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