Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent
1997-10-20
2000-12-19
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
455 77, 4551803, 4551921, 455259, H04B 138, H04B 140, H04B 118
Patent
active
061637106
ABSTRACT:
A mobile radio for use in multiple different frequency plans is disclosed. The multiple different frequency plans, such as land-based plans (cellular, land mobile radio, etc.) and satellite-based plans may employ different frequency bands and, within those different bands, different frequency channel step sizes. The mobile radio employs only a single loop synthesizer to accommodate all of the different plans, including all of the different channel step sizes. It does so by employing a dynamically programmable divider circuit within the single loop synthesizer for macro-adjustment of the local oscillator frequency and a dynamically adjustable reference oscillator within the single loop synthesizer for micro-adjustment of the local oscillator frequency depending upon a recovered carrier signal.
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Blaser Robert J.
Przelomiec Thomas A.
Appiah Charles N.
Eisenzopf Reinhard J.
Ericsson Inc.
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