Counter arrangement useful in a frequency locked loop tuning sys

Details Counter arrangement useful in a frequency locked loop tuning sys Counter arrangement useful in a frequency locked loop tuning sys

1982-09-01

1984-04-10

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455183, 3581911, H04B 116, H04N 544

Patent

active

044425473

ABSTRACT:
A counter arrangement for measuring the frequency of a local oscillator signal produced in a television tuning system includes a main down counter and an auxiliary down counter. Prior to a measurement interval, the channel number of the selected channel is loaded into the main down counter and a number which is related to the frequency separation, S, in mHz, between the channels by the relationship:

REFERENCES:
patent: 3961266 (1976-06-01), Tanaka
patent: 4088959 (1978-05-01), Sumi
patent: 4109283 (1978-08-01), Rast
patent: 4121162 (1978-10-01), Alberkrack et al.
patent: 4305157 (1981-12-01), Mogi

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