Tuning apparatus for the VHF band of a television receiver

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

455180, 455191, H04N 5455, H04B 118

Patent

active

047713321

ABSTRACT:
A channel selection circuit selects signals of a desired frequency from television signals. A channel interpretation circuit determines whether or not the signals thus selected are low-band or high-band. When the signals are low-band, a movable contact is coupled to a D.C. power source. When the signals are high-band, the movable contact is coupled to the ground. A first trap circuit traps the intermediate-frequency components of the selected signals. A second trap circuit connected to the first trap circuit, and a third trap circuit coupled between the output of the second trap circuit and the group and also connected to the movable contact of a switch section, cooperate, thereby trapping predetermined signals. More specifically, when the movable contact is coupled to the D.C. power source, a semiconductor switching device is turned on, thus causing the second and third trap circuits to trap high-band signals and intermediate-frequency signals. When the movable contact is coupled to the ground, the switching device is turned off, thereby causing to the second and third trap circuits to perform the image-trapping of high-band signals and to trap low-band signals.

REFERENCES:
patent: 3962643 (1976-06-01), Ma
patent: 4298290 (1981-09-01), Ijichi
patent: 4379269 (1983-04-01), Ijichi
patent: 4612571 (1986-09-01), Moon

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Tuning apparatus for the VHF band of a television receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tuning apparatus for the VHF band of a television receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tuning apparatus for the VHF band of a television receiver will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-809471

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.