Input stage for a CTD low-pass filter

Details Input stage for a CTD low-pass filter Input stage for a CTD low-pass filter

1977-04-19

1979-03-20

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

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

307221C, 307221D, H03H 728, H01L 2710, G11C 1928, H01L 2978

Patent

active

041456769

ABSTRACT:
An input stage for a transversal charge transfer filter, which suppresses parasitic image frequencies. It comprises two parallel channels to which the input signal is applied simultaneously. Sampling of the signal is performed in each channel with a periodicity Te, and a relative phase-shift of Te/2. The two samples are then added in order to eliminate components having periodicities in the neighborhood of Te.

REFERENCES:
patent: 3819953 (1974-06-01), Puckette et al.
patent: 3940602 (1976-02-01), Lagnado et al.
patent: 4032867 (1977-06-01), Engeler et al.
Smith et al--"Programmable Bandpass Filter and Tone Generator Using Bucket Brigade Delay Lines", in IEEE Transactions on Communications, vol. COM-22, No. 7, Jul. 1974, pp. 921-925.

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