Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1990-07-13
1991-10-15
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455186, 455260, 455265, 455266, H04B 1702, H04B 106
Patent
active
050582046
ABSTRACT:
A paging receiver has a synthesizer for governing the receive frequency. The paging receiving further has characteristics which are varied in response to the receive frequency. These characteristics include varying the bandwidth of a loop filter within a phase lock loop within the synthesizer as well as varying the time in which a detector circuit used to extract a DC level from a recovered audio signal is disabled. Furthermore, the bandwidth of the loop filter is varied in response to switching from a first receive frequency to a second receive frequency in order to provide for either a uniform frequency lock time or for a rapid frequency lock time. Furthermore, the time in which the detector circuit is disabled is correspondingly changed.
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Davis Walter L.
Herold Barry W.
Tahernia Omid
Collopy Daniel R.
Eisenzopf Reinhard J.
Faile Andrew
Ingrassia Vincent B.
Koch William E.
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