Unit using IC device having constant-current circuitry

Details Unit using IC device having constant-current circuitry Unit using IC device having constant-current circuitry

1996-07-31

1998-03-17

Berhane, Adolf

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

057291225

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 current to the drive circuits, but also a bias circuit for supplying a 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 (1991-07-01), Beunett et al.
patent: 5570009 (1996-10-01), Nakamura

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