Comb filter

Details Comb filter Comb filter

1987-02-02

1988-03-29

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333141, 333188, H03H 701, H03H 905

Patent

active

047346620

ABSTRACT:
A comb filter for a television receiver set for separating a video signal into a color signal and an intensity signal has a single support with fixed holders for keeping a solid delay line circuit and a related process circuit in place. The holders have grooves or slits for accepting said solid delay line circuit and said process circuit. The process circuit has some adjustable electronic components which are adjusted by using a laser beam or sandblast so that dip frequency of the filter is adjusted. The adjustment is carried out before the filter is mounted on a television set so that no adjustment is necessary after the filter is mounted on the television set.

REFERENCES:
patent: 3992686 (1976-11-01), Canning
patent: 4035695 (1977-07-01), Knutson et al.
patent: 4408170 (1983-10-01), Rapeli et al.
patent: 4492928 (1985-01-01), Hayakawa et al.
Yanagida et al-"Glass Delay Lines for PAL Color TV Receiver Systems (Part 2)", Review of Showa Cables Co. Ltd., vol. 24, No. 1, published 1974; pp. 22-29.

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