Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1983-10-27
1985-06-25
Bookbinder, Marc E.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455161, 455179, H03J 720, H04B 116
Patent
active
045258643
ABSTRACT:
A device for generating a tuning frequency set command signal for a tuner system having a manual tuning mode and an automatic channel scanning mode, including a manually operable means for generating an up control signal for raising the tuning frequency and a manually operable means for generating a down control signal for lowering the tuning frequency, and timing means for measuring the duration of the up or down control signal, and control means for automatically selecting the automatic channel scanning mode when the duration of the up or down control signal becomes longer than a predetermined time period, is characterized by a reset means for resetting the timing means each time when the up or down control signal disappears, thereby alleviating the fear that the automatic channel scanning mode is erroneously selected when the means for generating up or down control signal is operated more than one time within the predetermined time period.
REFERENCES:
patent: 4041535 (1977-08-01), Rzeszewski et al.
patent: 4220973 (1980-09-01), Macchetta
patent: 4353131 (1982-10-01), Yueh
Bookbinder Marc E.
Pioneer Electronic Corporation
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