CMOS soft clipper

Details CMOS soft clipper CMOS soft clipper

1997-04-08

1999-07-13

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

327103, 327404, 327322, H03K 508, H03L 500

Patent

active

059232030

ABSTRACT:
A soft clipper circuit in CMOS technology not only allows the knee to be programmed, but also the slope of the curve after the knee to be programmed. This is accomplished by putting a second transconductance in parallel with the first transconductance, and using a switching circuit to connect the output of the second transconductance to that of the first transconductance when the knee level is reached. This is determined by a comparator which has an input coupled to the second transconductance and controls a control node of the switching circuit.

REFERENCES:
patent: 4506113 (1985-03-01), Blomley
patent: 4877981 (1989-10-01), Gomes
patent: 5350956 (1994-09-01), Gronroos
patent: 5525928 (1996-06-01), Asakawa
patent: 5530399 (1996-06-01), Chambers et al.
patent: 5701099 (1997-12-01), Shafir

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