Rotary switch type television tuner

Details Rotary switch type television tuner Rotary switch type television tuner

1979-12-17

1981-12-08

Orsino, Jr., Joseph A.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455175, 334 49, 334 85, H03J 502

Patent

active

043051561

ABSTRACT:
A television tuner comprises a rotary switching shaft, switching plates associated with the rotary switching shaft, and an input tuning portion, an interstage tuning portion and a frequency converting portion coupled to the switching plates and adapted for channel selection by means of the rotary switching shaft. An additional plate is provided between one switching plate associated with the interstage tuning portion and another switching plate associated with the frequency converting portion. The additional plate is provided with a surface acoustic wave device performing the function of a video intermediate frequency filter and with an integrated circuit including a video intermediate frequency amplifier and a video detector.

REFERENCES:
patent: 3309613 (1967-03-01), Bell
patent: 3328700 (1967-06-01), Chipman
patent: 4157504 (1979-06-01), Ito et al.

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