Square-law clamping circuit

Details Square-law clamping circuit Square-law clamping circuit

1993-06-14

2000-02-29

Cunningham, Terry D.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Exponential

327313, 327327, 327328, 327543, 327350, G06F 7552, G06F 7556

Patent

active

060314087

ABSTRACT:
A square-law clamping circuit (99, 120) sinks a current from an input/output terminal proportional to a square of a difference between a voltage thereon and a reference voltage. A first MOS transistor (130) has a source for receiving the reference voltage, a gate, and a drain coupled to its gate. A current source (134) coupled to the drain of the first MOS transistor (130) sources a predetermined current therefrom. A second MOS transistor (132) has a source providing the input/output terminal (100, 121), a gate coupled to the drain of the first MOS transistor (130), and a drain. A current sink (135) coupled to the drain of the second MOS transistor (132) sinks a current therefrom.

REFERENCES:
patent: 3813595 (1974-05-01), Sheng
patent: 4314167 (1982-02-01), Groves et al.
patent: 4375038 (1983-02-01), Crosby
patent: 4453091 (1984-06-01), Katakura et al.
patent: 4507577 (1985-03-01), Kwan
patent: 4524292 (1985-06-01), Nagano
patent: 4855618 (1989-08-01), Brokaw
patent: 4914316 (1990-04-01), Rossi et al.
patent: 5029281 (1991-07-01), Armstrong
patent: 5177374 (1993-01-01), Carpenter et al.
patent: 5187396 (1993-02-01), Armstrong, II et al.

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