Telecommunications – Transmitter and receiver at same station – With frequency stabilization
Patent
1993-11-09
1995-09-05
Urban, Edward F.
Telecommunications
Transmitter and receiver at same station
With frequency stabilization
455 77, 455260, 455343, 455266, 331 17, 331 25, H04B 140
Patent
active
054487633
ABSTRACT:
An apparatus and method for operating a phase locked loop frequency synthesizer responsive to radio frequency channel spacing. The phase locked loop (PLL) frequency synthesizer (300) tunes a radio frequency transceiver (100) to a radio frequency channel. A processor (110) in the transceiver (100) determines the channel spacing of the radio frequency channels in a portion of a radio frequency band including the radio frequency channel, and controls the PLL frequency synthesizer (300) responsive to the determined channel spacing. The present invention advantageously provides the PLL frequency synthesizer (300) with faster lock time and lower noise.
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Metroka, M. "An Introduction to Narrowband AMPS" IEEE, 1991; pp. 1463-1468.
Faile Andrew
Kaschke Kevin D.
Motorola
Urban Edward F.
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