Current mirror circuit

Details Current mirror circuit Current mirror circuit

1986-07-07

1987-09-08

Wan, Gene

Amplifiers

With semiconductor amplifying device

Including differential amplifier

H03F 345

Patent

active

046927115

ABSTRACT:
This invention is described a current mirror circuit. In a current mirror circuit wherein there are provided first and second transistors which have their emitters in common and constitute a differential amplification circuit, third and fourth transistors which have their bases in common, emitters of the first and second transistors are coupled with a constant current source, a collector of the second transistor is coupled with bases of the third and fourth transistors, a collector of the third transistor is coupled with a base of the first transistor and an input current source, a base of the second transistor is coupled with a bias node, emitters of the third and fourth transistors are coupled with a reference power source, a collector of the fourth transistor is coupled with an output node, a collector of the first transistor is coupled with the reference power source through a load resistance, and a capacitor for coupling the base and the collector of the first transistor each other.

REFERENCES:
patent: 4437023 (1984-03-01), Gill

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