Tuning circuit for a multiband tuner

Details Tuning circuit for a multiband tuner Tuning circuit for a multiband tuner

1985-02-28

1986-07-01

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455196, 334 15, 331179, H04B 116, H03J 500

Patent

active

045984239

ABSTRACT:
A multiband local oscillator of a television tuner comprises a common collector transistor amplifier, a feedback circuit for conditioning the amplifier to oscillate in the wide range of frequencies for VHF broadcast and cable channels and a tuning circuit coupled to the base electrode of the transistor. Bandswitching signals are applied to switching diodes in the multiband tuning circuit to produce tuned circuit configurations for the various frequency bands. When one band is selected, the corresponding bandswitching signal is coupled to the switching diode associated with a lower band to turn it on as well as the switching diode for the selected band to inhibit out-of-band oscillators due to parasitic elements of the tuning circuit.

REFERENCES:
patent: 3264566 (1966-08-01), Kaufman et al.
patent: 4363135 (1982-12-01), Moon
patent: 4380827 (1983-04-01), Moon
patent: 4404686 (1983-09-01), Moon
patent: 4418427 (1983-11-01), Muterspaugh

Affiliated with

Also associated with

Rating

Tuning circuit for a multiband tuner 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 circuit for a multiband tuner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tuning circuit for a multiband tuner will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1086353