Current mirror circuits with field effect transistor feedback

Details Current mirror circuits with field effect transistor feedback Current mirror circuits with field effect transistor feedback

1982-03-12

1983-08-09

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including current mirror amplifier

323316, 330257, H03F 304

Patent

active

043981607

ABSTRACT:
Two current mirror circuits employing a combination of JFET's and bipolar transistors and a high gain amplifier including one of the mirrors are disclosed. The mirrors each include input and output bipolar transistor with a JFET variable current sink circuit connected across the collector-to-base electrodes of one of the bipolar transistors and a JFET constant current supply is connected to the variable current sink. One of the mirrors further includes a bipolar turn-around circuit connected between the constant current supply and the variable current sink to compensate for otherwise possibly undesirable effects of the base currents of the input and output bipolar transistors.

REFERENCES:
Motorola Linear Integrated Circuits, Series C, 1979, MC1403A 1 MC1503A, pp. 4-42-4-47.

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