Circuit arrangement with frequency synthesis for the tuning of r

Details Circuit arrangement with frequency synthesis for the tuning of r Circuit arrangement with frequency synthesis for the tuning of r

1976-10-26

1981-08-11

Richardson, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455260, H04B 132

Patent

active

042837910

ABSTRACT:
A circuit arrangement for the selection and the tuning of a radio-electric signal in a signal receiving set is described.
The main feature of this set, which comprises a controllable local oscillator whose frequency is controlled by a control loop which maintains it in a fixed relationship with a number N, is the provision of means for calculating at least a substantial part of said number N, by starting from a plurality of signals representing a number K indicative of the signal to be tuned.
In particular the signal receiving set can be a television receiver, and said radio-electric signal to be tuned belongs to a television channel.

REFERENCES:
patent: 3665316 (1972-05-01), Jeffers
patent: 3883807 (1975-05-01), Alberkrack
patent: 3898566 (1975-08-01), Switzer et al.
patent: 3940702 (1976-02-01), Yoshimura et al.
patent: 3961261 (1976-06-01), Plfasterer
patent: 4088959 (1978-05-01), Sumi
CCTA Canadian Cable TV Association, Prize Papers 1974/75, Finlay et. al., pp. 18-26.
A Uniquely Simplified TV Tuning System, S. Hiliker, IEEE Transactions on Consumer Electronics, Feb. 1976, pp. 61-68.
A Modular Approach to Digital Tuning, G. Ledenbach, IEEE Transaction on Consumer Electronics, Aug. 1976, pp. 210-213.
Channels, Channels . . . and More Channels, No. 3/31/72-80, R. Powers, NCTA Convention, May 1972.

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