Current mirror circuit

Details Current mirror circuit Current mirror circuit

1988-06-02

1989-08-15

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including current mirror amplifier

323315, H03F 304

Patent

active

048578649

ABSTRACT:
A current mirror circuit which comprises a current input terminal, a current output terminal, an input-current supplying section, a first transistor, and a second transistor. The input-current supplying section supplies an input current to the current input terminal. The first transistor has a collector coupled to the current input terminal, an emitter coupled to a first power-supply potential terminal, and a base. The second transistor has a collector connected to the current output terminal, an emitter coupled to the first power-potential terminal, and a base connected to the base of the first transistor. The current mirror circuit further comprises a third transistor and a current mirror section. The third transistor a collector, a base coupled to the collector of the first transistor, and an emitter coupled to the first power-supply potential terminal. The current mirror section supplies a current proportionate to the collector current of the third transistor, to the bases of the first and second transistors.

REFERENCES:
patent: 3566289 (1971-02-01), Cope
patent: 4528496 (1985-07-01), Naokawa et al.

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