Current mirror circuit

Details Current mirror circuit Current mirror circuit

1992-07-24

1994-02-01

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including current mirror amplifier

315315, H03F 304

Patent

active

052835375

ABSTRACT:
A current mirror circuit has first through fourth transistors. The first and second transistors are of a first conductivity type and have their emitters connected to a power source and their bases commonly connected. The third transistor is of the first conductivity type and has its collector connected to a reference potential, its emitter connected to the bases of the first and second transistors, and its base connected to a collector of the first transistor. The fourth transistor is of the first conductivity type and has its emitter connected to a collector of the second transistor. A control device controls a base of the fourth transistor by an output current which changes in accordance with a current flowing in the collector of the first transistor.

REFERENCES:
patent: 3936725 (1976-02-01), Schneider
patent: 4166971 (1979-09-01), Schneider
patent: 4412186 (1983-10-01), Nagano
patent: 4503381 (1985-03-01), Bowers
patent: 4716305 (1987-12-01), Sakuragi et al.
patent: 4758820 (1988-07-01), Tateno
patent: 4801892 (1989-01-01), Yamakoshi et al.
patent: 4807009 (1989-02-01), Fushimi et al.
patent: 5126689 (1992-06-01), Nakamura

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