Low noise ccd input circuit

G - Physics – 11 – C

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352/82.22

G11C 11/08 (2006.01) G11C 19/28 (2006.01) H01L 29/768 (2006.01)

Patent

CA 1101122

RCA 70,945 LOW NOISE CCD INPUT CIRCUIT Abstract of the Disclosure A "fill and spill" charge coupled device (CCD) input circuit in which the source electrode is clamped to a voltage level (VT+.DELTA.V) lower than that of the input gate electrode during the fill operation, where (VT+.DELTA.V) is the gate-to-source voltage of a field effect transistor during conduction. The field effect transistor and input gate electrode are integrated onto the same semiconductor substrate and therefore exhibit the same threshold voltage VT so that the difference between the surface potential at the source electrode and the surface potential beneath the input gate electrode is independent of VT.

282503

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