Constant-Current circuitry, IC device driver using same, and uni

Details Constant-Current circuitry, IC device driver using same, and uni Constant-Current circuitry, IC device driver using same, and uni

1995-06-07

1996-10-29

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323316, 323267, 323272, G05F 322, G05F 326

Patent

active

055700098

ABSTRACT:
Constant-current circuitry supplying constant current so as to drive a plurality of circuit blocks using a plurality of drive circuits. The constant-current circuitry includes not only a plurality of transistors for supplying a current to the drive circuits, but also a bias circuit for supplying predetermined voltage to the bases of the transistors. The bases of the transistors are commonly connected, and the emitters of the transistors are connected to the drive circuits. Such constant-current circuitry prevents the circuit blocks from interfering with each other.

REFERENCES:
patent: 3679963 (1972-07-01), Free et al.
patent: 3743850 (1973-07-01), Davis
patent: 4118712 (1978-10-01), Kawasaki
patent: 4509156 (1985-04-01), Ohara et al.
patent: 4716305 (1987-12-01), Sakuragi et al.
patent: 4758820 (1988-07-01), Tateno
patent: 4947103 (1990-08-01), Abdi et al.
patent: 5029295 (1991-06-01), Bennett et al.

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