Current mirror circuit with control means for establishing an in

Details Current mirror circuit with control means for establishing an in Current mirror circuit with control means for establishing an in

1984-05-22

1986-01-28

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330288, H03F 345

Patent

active

045674442

ABSTRACT:
A current mirror circuit is formed of input and output transistors of the same polarity having emitters commonly connected to a reference potential and bases connected in common, the collector of the input transistor is connected to ground through a constant current source which initially establishes the input current, a differential amplifier compares the collector current of the input transistor to a desired input current as determined by a bias voltage applied to one input of the differential amplifier and provides negative feedback to maintain the desired input current, thereby to maintain a desired output-to-input current ratio.

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