Digital channel selection apparatus

Details Digital channel selection apparatus Digital channel selection apparatus

1979-04-16

1981-02-03

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455192, H04B 106

Patent

active

042492599

ABSTRACT:
A digital channel selection apparatus comprising a memory, a digital-to-analog converter for converting digital information read out of the memory to an analog tuning voltage, a voltage-controlled tuner which is tuned to an incoming RF carrier frequency on a selected channel in response to the analog tuning voltage, an automatic fine tuning discriminator connected to the tuner and a digital automatic fine tuning circuit responsive to the automatic fine tuning discriminator to vary the analog tuning voltage to effect an automatic fine tuning control, in which in addition to the digital automatic fine tuning control an analog automatic fine tuning control is effected to carry out reliable automatic fine tuning control. To this end, a small fraction of an analog output voltage, from the automatic fine tuning discriminator, which has a magnitude dependent upon an output intermediate carrier frequency of the tuner is superposed onto the output voltage of the digital-to-analog converter.

REFERENCES:
patent: 4085371 (1978-04-01), Mogi et al.
patent: 4100578 (1978-07-01), Arneson
patent: 4123716 (1978-10-01), Borg

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-554154