High swing CMOS cascode current mirror

Details High swing CMOS cascode current mirror High swing CMOS cascode current mirror

1984-08-23

1986-04-15

Beha, Jr., William H.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

330277, 330288, G05F 326

Patent

active

045830371

ABSTRACT:
A CMOS cascode current mirror exhibits an input side voltage swing equal to V.sub.T +2V.sub.ON and provides virtually no mismatch between the input and output currents. A negative feedback loop (52) comprising a plurality of MOS transistors is utilized to provide the voltages necessary for good current matching (V.sub.T +2V.sub.ON, V.sub.T +V.sub.ON) and to maintain the transistors of the input circuit branch in their saturation region of operation. By maintaining the input transistors in saturation, the output current will track the input current, regardless of increases in ambient temperature or the value of threshold voltage V.sub.T.

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patent: 4461991 (1984-07-01), Smith
patent: 4471292 (1984-09-01), Schenck

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