Television tuning apparatus

Details Television tuning apparatus Television tuning apparatus

1995-11-16

1997-10-14

Faile, Andrew

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

4551933, 4551972, 341152, H04B 116

Patent

active

056782110

ABSTRACT:
The invention concerns an arrangement including a microprocessor controller, PROM memory, and a digital to analog converter (DAC) arrangement for generating a plurality of control voltages for trimming respective ones of a plurality of varactor controlled tunable filters. The controller couples digital control signals to the respective DACs which generate respective analog control voltages which are applied to the respective tunable filters. A tuning voltage generated by a closed control loop, such as phased locked loop also under the control of the controller, is combined with the output control voltages generated by the respective DAC's in a resistance divider arrangement.

REFERENCES:
patent: 4334323 (1982-06-01), Moore
patent: 4364026 (1982-12-01), Steckler et al.
patent: 4402089 (1983-08-01), Knight et al.
patent: 4472685 (1984-09-01), Dutasta
patent: 4595910 (1986-06-01), Wine
patent: 4685150 (1987-08-01), Maier
patent: 4736456 (1988-04-01), Maier
patent: 5059979 (1991-10-01), Micic et al.
patent: 5263187 (1993-11-01), Sugawa et al.
patent: 5280638 (1994-01-01), Porambo et al.
Patent Abstracts of Japan, vol. 10, No. 39, 15 Feb., 1986 and Japanese Pat. 60-194818 (Onkyo K.K.), 3 Oct., 1985.

Affiliated with

Also associated with

Rating

Television tuning 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 Television tuning apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Television tuning apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1563242