Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1980-03-26
1982-06-08
Ng, Jin F.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455170, 455196, H04B 116
Patent
active
043343180
ABSTRACT:
In a tuning circuit for tuning a receiver to a desired broadcast frequency, which tuning circuit includes a source of counting pulses indicating the magnitude of the change in the frequency value to which the circuit is to be tuned, a counter connected to receive the counting pulses and to assume a count state representative of the broadcast frequency to which the circuit is to be tuned, and a timing member for producing a tuning signal having a value determinative of the frequency to which the circuit is tuned during a tuning operation, the timing member is provided with a unit connected to the source of counting pulses for deriving a control signal representative of the frequency of the pulses, and a unit connected for varying the tuning signal in accordance with the control signal in such a manner that as the frequency of the counting pulses increases, the rate of change of the frequency to which the circuit is tuned is increased.
REFERENCES:
patent: 3803494 (1974-04-01), Howell et al.
patent: 3922609 (1975-11-01), Grohmann
patent: 4110695 (1978-08-01), Klank et al.
patent: 4161698 (1979-07-01), Klank
patent: 4201943 (1980-05-01), Klank
patent: 4263581 (1981-04-01), Okatani et al.
patent: 4267601 (1981-05-01), Umeda et al.
patent: 4271528 (1981-06-01), Brown
patent: 4281415 (1981-07-01), Rock, Jr.
Klank Otto
Wahling Wilfried
LICENTIA Patent-Verwaltungs-G.m.b.H.
Ng Jin F.
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