Title: Charge transfer circuit with threshold voltage compensating means

Abstract: A charge transfer circuit of the type including first and second capacitors and a charge transfer transistor for transferring discrete packets of charge from the first to the second capacitor is disclosed. The charge transfer circuit includes a feedback circuit which recharges the first capacitor to a value which varies as a function of the threshold voltage of the charge transfer transistor. As a result, the magnitude of the charge packets transferred by the charge transfer remain at a predetermined value irrespective of variations in the threshold voltage of the transistor.

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Inventors: Eichelberger, Charles W. (Schenectady, NY, US)
Butler, Walter J. (Scotia, NY, US)

Application Number: 852233
Filing Date: 1977-11-17
Publication_date: 1979-02-06
Assignee: General Electric Company (Schenectady, NY)
Primary Class(es): 341/118 257/238, 341/172, 377/58
Other Classes:
US Patent Ref:

3414807	Dec, 1968	Evans	340/347.
3737683	Jun, 1973	Sangster	307/221.
3986176	Oct, 1976	Weimer	307/221.
4070667	Jan, 1978	Eichelberger	340/347.
4074260	Feb, 1978	Butler	340/347.

Other Refs:
Primary Examiner: Miller, Charles D.
Assistant Examiner:
Attorney: Krauss; Geoffrey H., Cohen; Joseph T., Snyder; Marvin