Tuners – Tuner unit with electromagnetic operator – Predetermined center frequency selector
Patent
1978-08-17
1980-02-19
Griffin, Robert L.
Tuners
Tuner unit with electromagnetic operator
Predetermined center frequency selector
325462, 325490, 334 15, H04B 116
Patent
active
041896785
ABSTRACT:
A combination VHF-UHF tuner includes a VHF tuner and a UHF tuner in which the VHF tuner has at least three tuning networks connected in a stage preceding a mixer and each constituted by first and second coils and a variable capacitance diode. The first coil in each of the tuning network is coupled to a switching diode for shortcircuiting the first coil for establishing a network operable to a high band VHF signal and for opening the first coil connected to the second coil for establishing a tuning network operable to a low band VHF signal. A band selecting circuit is provided for controlling the three tuning networks in such a manner that the three tuning networks are all operable to the high or low band VHF signal when the VHF channel is tuned in and that at least one of the three tuning networks is operable to the high band VHF signal while the remaining is operable to the low band VHF signal when the UHF channel is tuned in.
REFERENCES:
patent: 3723882 (1973-03-01), Carlson
patent: 3727140 (1973-04-01), Rodrigalvarz Nieto et al.
patent: 3903487 (1975-09-01), Maier
Sakamoto Shuji
Wada Shuichi
Gerasimow Alexander
Griffin Robert L.
Sanyo Electric Co,. Ltd.
LandOfFree
Combination VHF-UHF tuner for use in a television receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Combination VHF-UHF tuner for use in a television receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combination VHF-UHF tuner for use in a television receiver will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-655037