Wave transmission lines and networks – Coupling networks – Frequency or time domain filters and delay lines utilizing...
Patent
1981-03-05
1983-03-22
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Frequency or time domain filters and delay lines utilizing...
307221D, 357 24, 358 31, H04N 9535, H03H 1106, H03H 1706, G11C 1928
Patent
active
043777945
ABSTRACT:
A CCD comb filter includes long and short CCD delay lines connected to receive a common input signal and is arranged to combine output signals of the long and short CCD delay lines. In order to realize a CCD comb filter very close to an optimum comb filter the product of the number of stages of the long CCD delay line and the transfer inefficiency of each stage thereof is set substantially equal to the product of the number of stages of the short CCD delay line and the transfer inefficiency of each stage thereof. In order that the transfer inefficiency of the short CCD delay line may be made greater to satisfy the above-mentioned requirement, transfer electrodes of the short CCD delay line are designed such that their length as viewed in charge transfer direction is made larger than the length of transfer electrodes of the long CCD delay line.
REFERENCES:
D. J. Sauer et al., A CCD Comb Filter IC for TV Receivers, 1980 IEEE International Solid-State Circuits Conference, p. 32, (Feb. 13, 1980).
Sakaue Tatsuo
Sato Chikara
Nussbaum Marvin L.
Tokyo Shibaura Denki Kabushiki Kaisha
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