Clamping circuit

Details Clamping circuit Clamping circuit

1988-07-29

1990-04-03

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307555, 307562, 307359, H03K 508

Patent

active

049143247

ABSTRACT:
A clamping circuit suitable for an image processing is disclosed. This clamping circuit includes a differential output circuit to which an input signal is applied, series-connected two MOS type gates circuits respectively having gate electrodes to which an output signal from the differential output circuit to be clamped and a reference voltage of a target value are applied, and reset circuit including a holding capacitor connected to the drain electrode side of either of the MOS type gate circuits to discharge charge in the holding capacitor at the time of beginning of clamping operation. The clamping circuit further includes a current source connected to the junction between the MOS type gate circuits, charge current flow control circuit for accumulating charge in the holding capacitor, and feedback circuit for feeding back a potential of the holding capacitor to the differential output circuit.

REFERENCES:
patent: 3543169 (1970-11-01), Hill
patent: 4255715 (1981-03-01), Cooperman
patent: 4328434 (1982-05-01), Geller
patent: 4513321 (1985-04-01), Olson
patent: 4742392 (1988-05-01), Hashimoto

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