Filter circuit having a charge transfer device

Details Filter circuit having a charge transfer device Filter circuit having a charge transfer device

1981-04-17

1983-09-20

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Frequency or time domain filters and delay lines utilizing...

333173, 333166, 377 61, H03H 1502, G11C 2700, G11C 2702

Patent

active

044059086

ABSTRACT:
A filter circuit comprising a charge transfer device of the type which includes first and second sets of charge storage devices, such as capacitors, the first and second sets of charge storage devices being supplied with first and second clock signals, respectively, and further including first and second sets of switches which are actuated in response to the first and second clock signals, respectively, each switch being operable, when actuated, to transfer charge between a charge storage device in one set and a charge storage device in the other set, thereby transferring a charge through succeeding switches to be temporarily stored in succeeding charge storage devices. A semiconductor element, such as a transistor, is actuated in response either to the first or to the second clock signals for transferring the charge stored in a first predetermined charge storage device to a second predetermined charge storage device. An output circuit is coupled to a preselected charge storage device for deriving an output signal from the filter circuit.

REFERENCES:
patent: 3474260 (1969-10-01), Frohbach
patent: 3740577 (1973-06-01), Sangster
patent: 3916219 (1975-10-01), Wilmsmeyer

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