Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1994-02-15
1996-08-27
Faile, Andrew
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
4551662, 4551861, H04B 118
Patent
active
055510710
ABSTRACT:
A scan receiving system comprising an antenna circuit, a radio-frequency reception circuit connected to the antenna circuit and for converting a received radio-frequency signal into an audio-frequency signal, an audio-frequency circuit connected to the radio-frequency reception circuit and for amplifying the audio-frequency signal supplied from the radio-frequency reception circuit, an input circuit for inputting a desired reception frequency, and a controller connected to the radio-frequency reception circuit, the audio-frequency circuit and the input circuit, the controller including a plurality of channel memories which are provided in one-to-one correspondence with a plurality of carrier frequency channels so that a plurality of desired reception frequencies inputted through the input circuit are programmed in the plurality of channel memories, the frequencies programmed in the plurality of channel memories being scanned in the order of frequency ascending or descending in accordance with a scan instruction inputted through the input circuit to perform tuning to a reception signal in the radio-frequency reception circuit by successively using the programmed frequencies as reference values to thereby perform reception of a signal from a desired station.
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Harada Seiji
Nakano Yasuyoshi
Brown Daniel R.
Faile Andrew
Le Thanh
Uniden America Corporation
Uniden Corp.
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