Automatic channel selection apparatus

Details Automatic channel selection apparatus Automatic channel selection apparatus

1978-08-25

1980-11-04

Martin, John C.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455150, 455154, 455161, 3581931, H04B 132

Patent

active

042323975

ABSTRACT:
An automatic channel selection apparatus comprises an electronic tuner having a local oscillator an oscillation frequency of which is controlled by an applied voltage, a voltage sweep circuit for sweeping the voltage to be applied to the local oscillator, means for deriving from an output of the local oscillator, signals of different phases and combining those signals, a detector for envelope-detecting an output of the deriving means and means for counting the number of varying cycle periods in the output of the detector which changes periodically each time the oscillation frequency of the local oscillator changes by a given amount which is inversely proportional to the phase difference to change a tuning frequency of the electronic tuner by a specified amount.

REFERENCES:
patent: 3818353 (1974-06-01), Sakamoto
patent: 3936753 (1976-02-01), Clark
patent: 4037181 (1977-07-01), Ieki et al.
patent: 4077009 (1978-02-01), Klank et al.
patent: 4126836 (1978-11-01), McCusker

Affiliated with

Also associated with

Rating

Automatic channel selection apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic channel selection apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic channel selection apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1648679