Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1988-12-05
1992-08-04
Crosland, Donnie L.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455121, 455134, 4551541, 4551691, 4551951, 455260, 3403111, 34082544, H04B 118
Patent
active
051367190
ABSTRACT:
A wristwatch paging receiver is provided with an antenna matching network that automatically retunes the network at the beginning of a listening interval. During the retuning operation, a control signal is applied to a variable tuning element in the matching network, such as a varactor diode, and is swept from a minimum value to a maximum value. This sweeping is desirably performed in discrete voltage steps that correspond to unit increments of varactor capacitance. A feedback signal from the receiver, such as an AGC signal, is monitored during this operation to note which varactor bias signal yields the maximum AGC signal. After the sweep is concluded, the apparatus applies to the varactor the bias voltage that yielded the maximum AGC signal during the sweeping operation. This bias voltage is maintained through the end of the listening interval. At the beginning of the next listening interval, the process may be repeated.
REFERENCES:
patent: 3519939 (1970-07-01), Tashima
patent: 3600684 (1971-08-01), Cherry
patent: 4381566 (1983-04-01), Kane
patent: 4450588 (1984-05-01), Rohrich et al.
patent: 4710973 (1987-12-01), Suzuki
patent: 4713631 (1987-12-01), Enderby et al.
patent: 4789866 (1988-12-01), Ohe et al.
patent: 4817196 (1989-03-01), Macnak et al.
patent: 4837852 (1989-06-01), Takada et al.
patent: 4862516 (1989-08-01), Macnak et al.
patent: 4885802 (1989-12-01), Ragan
patent: 4921465 (1990-05-01), Hietala et al.
Gaskill Garold B.
Mukai Larry H.
Crosland Donnie L.
Galbi Elmer
Seiko Corp.
Seiko Epson Corp.
LandOfFree
Automatic antenna tubing method and 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 Automatic antenna tubing method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic antenna tubing method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-786377