Abrupt junction varactor diode television tuner

Details Abrupt junction varactor diode television tuner Abrupt junction varactor diode television tuner

1974-08-05

1976-06-08

Libman, George H.

325459, 325462, H04B 106

Patent

active

039626431

ABSTRACT:
A VHF television tuner has four tunable circuits each including an abrupt junction varacto diode having a predictable capacitance tuning voltage characteristic. The VHF frequency spectrum is divided into Lo and Hi bands encompassing television channels 2-14 6 and 7-14 13, respectively. A pair of voltage divider networks comprising precisely trimmed resistive material on a ceramic substrate provide tuning voltage terminals corresponding to the VHF television channels. The end terminals of each divider network are coupled to adjustable potentiometers for setting the tuning voltage at each extreme of the voltage divider. A substrate mounted switch accesses the tuning voltage poins, supplies bandswitching voltages and provides AFC defeat between channels.

REFERENCES:
patent: 3204207 (1965-08-01), Denker
patent: 3626352, McCoig
patent: 3628152 (1971-12-01), Carlson
patent: 3646450 (1972-02-01), Ma
patent: 3662271 (1972-05-01), Nakanishi
patent: 3685141 (1972-08-01), Sandera
patent: 3715671 (1973-02-01), Worchester
patent: 3767112 (1973-10-01), Tonari
patent: 3794924 (1974-02-01), Furuya et al.
patent: 3878466 (1975-04-01), Henrickson

Affiliated with

Also associated with

Rating

Abrupt junction varactor diode television 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 Abrupt junction varactor diode television tuner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abrupt junction varactor diode television tuner will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1102644