Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1995-02-09
1996-07-09
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
4551972, 455260, 455316, 455318, H04B 126
Patent
active
055354432
ABSTRACT:
A television receiver having an electronically controlled tuner is presented. A controlled local oscillator provides a local oscillator signal for the mixer. The controlled local oscillator includes an first input terminal for receiving a control signal for controlling its frequency and a first output terminal for providing an output local oscillator signal. A phase-locked loop includes a second input terminal for receiving the local oscillator signal and a second output terminal for providing a signal back to the first input terminal of the controlled local oscillator for controlling its frequency. At least a portion of the coupling between the first output terminal and the second input terminal, and the second output terminal and the first input terminal, have a common line.
REFERENCES:
patent: 3959728 (1976-05-01), Yamazaki et al.
patent: 4142158 (1979-02-01), Belisomi
patent: 4837852 (1989-06-01), Takada et al.
Hitachi VCR Model VT-F361A Schematic, Jun., 1992.
Hitachi VCR Model VT F551, AW VCR, Jul. 1991.
Sony Integrated Circuit CXA 1594L Data Sheets.
Eisenzopf Reinhard J.
Emanuel Peter M.
Le Thanh
Tripoli Joseph S.
Wein Frederick A.
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