Non-proportionate afc system

H - Electricity – 04 – N

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

365/9, 350/92

H04N 5/50 (2006.01) H03J 7/26 (2006.01)

Patent

CA 1044361

ABSTRACT A Television tuning system has a ramp voltage source including an electrical current source and an electrical current sink coupled through selectively operable transmission gates for varying the voltage of a tuning capacitor to control a local oscillator for tuning independent of received signal. The local oscillator signal is mixed with a received signal to produce an intermediate frequency signal which is amplified in an IF amplifier. A frequency detector is coupled to the IF amplifier and produces an error signal dependent upon the frequency difference between a reference frequency and the IF signal. An additional current source and sink are coupled to the tuning capacitor through transmission gates controlled by the error signals. Differences greater than a predetermined amount selectively activate the latter transmission gates to provide substantially constant magnitude tuning voltage corrections irrespective of the amount of the difference.

242445

LandOfFree

Say what you really think

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

Rating

Non-proportionate afc system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Non-proportionate afc system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-proportionate afc system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-429138

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