Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1978-04-21
1980-03-25
Murray, Richard
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455204, H04N 544
Patent
active
041953142
ABSTRACT:
A tuning circuit for tuning a high frequency receiving apparatus with residual sideband modulation, especially a television receiver, with a counter for forming encoded values of tuning voltage, with a store for the digital storing of the encoded values of tuning voltage, with a D/A converter for generating the analog tuning voltages from the encoded values and with a circuit for automatic fine tuning to the required position of a received transmitter. In such tuning circuit means are provided which so alter the value of the tuning voltage before or during writing into the store or after or during reading out from the store that this value corresponds not to the required tuning position but to a tuning position shifted into the fully transmitted sideband. The exact tuning ot the transmitter to the required position is effected by the circuit for fine tuning.
REFERENCES:
patent: 4038689 (1977-07-01), Rzeszewski et al.
patent: 4127822 (1978-11-01), Mogi et al.
patent: 4128849 (1978-12-01), Rhee
Haraszti Ibolya
Minner Willy
Sieber Paul
LICENTIA Patent-Verwaltungs-G.m.b.H.
Murray Richard
LandOfFree
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