H - Electricity – 03 – L
Patent
H - Electricity
03
L
365/5
H03L 7/16 (2006.01) H03J 5/00 (2006.01) H03J 5/02 (2006.01) H03J 7/24 (2006.01) H03J 7/28 (2006.01) H03L 7/20 (2006.01)
Patent
CA 1040331
Abstract of the Disclosure A channel selection system for TV receiver set comprises a harmonic generator for simultaneously producing a spectrum of frequencies with a frequency separation equal to that of a plurality of channels, and a local oscillator in the form of a sweep oscillator which initiates a sweep upon receipt of start-of-sweep signal to vary its oscillation frequency and which ends its sweep upon end-of-sweep signal to hold the frequency at the time the sweep was terminated. A band pass filter is provided for deriving a beat signal when a predetermined frequency difference has appeared between one of the harmonics generator frequencies and the sweep oscillator frequency. Means are provided for deriving marker signals corresponding to respective channel positions from the output of the band pass filter. By count- ing the marker signals or by determining the coincidence of a marker signal with a tuning signal from a TV receiver set, a desired channel or channel on which a signal is being transmitted may be selected and at the same time the frequency of the sweep oscillator way be held constant by means of an automatic frequency control (AFC) circuit.
167245
Fukuda Takeo
Nishibayashi Kazuo
Torii Kenichi
LandOfFree
Channel selection system for tv receiver set does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Channel selection system for tv receiver set, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Channel selection system for tv receiver set will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-531281