Circuit arrangement for discharging a capacity
AssigneeU.S. Philips Corporation
InventorsMarino G. Carasso, Bernardus H. J. Cornelissen, Johannes G. van Santen
Life of this patent
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Abstract
MOS switch is provided, in particular for a camera, with which within the line flyback time the whole optically generated signal can be transferred by periodically transferring back a fixed quantity of charge from the drain to the source.
Claims17
A semiconductor device comprising a semiconductor body having a switching device for transferring a quantity of charge Q.sub.s from a first capacitor C.sub.s to a second capacitor Cd within a time interval T having a definite duration, characterized in that means are provided for periodically transferring during said time interval a fixed quantity of charge Q.sub.t back to C.sub.s at a frequency n/T, where n and Q.sub.t are chosen so that for a period of t<T, where t is measured from charge transport, charge transferred from C.sub.s per unit of time is approximately equal to charge transferred back into C.sub.s in the same unit of time, and the potential of C.sub.s is substantially independent of Q.sub.s.
Dependencies are inferred from the claim text.