Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1985-04-15
1986-06-24
Groody, James J.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455170, 334 48, 74 1041, H04B 116
Patent
active
045971064
ABSTRACT:
A pair of stator contacts, which are positioned inside the tuner housing and are internally connected to the AFT circuit within the tuner housing, are positioned so that unused tuning coils carried by the station selector shaft of the tuner are momentarily connected to this pair of stator contacts as the station selector shaft is moved from one detented channel position to the next. Each time a tuning coil is connected to the AFT circuit it defeats the AFT operation thereof and prevents the AFT circuit from controlling the local oscillator until the next detented channel position is reached. When the station selector shaft reaches a detented channel position at least one of the pair of stator contacts is not connected to any of the tuning coils of the tuner so that the AFT circuit is free to control the local oscillator in a conventional manner.
REFERENCES:
patent: 3489029 (1970-01-01), Cappelle et al.
patent: 3757227 (1973-09-01), Weigel
patent: 3798579 (1974-03-01), Tap
patent: 3842683 (1974-10-01), Valdettaro
patent: 3906805 (1975-09-01), Badger et al.
patent: 3924209 (1975-12-01), Valdettaro
Groody James J.
Sarkes Tarzian Licensing Laboratory
Toth E. Anne
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