Telecommunications – Transmitter and receiver at separate stations – With control signal
Patent
1991-08-08
1992-12-29
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
With control signal
455 93, 455127, 330 51, 379 58, 379 63, H04B 100, H04B 700
Patent
active
051758717
ABSTRACT:
In a cellular telephone of the type capable of operating in both analog and digital modes, a power amplifier is provided which can operate efficiently in both the analog and digital modes of operation. The power amplifier includes a non-linear power amplifier stage and a linear power amplifier stage which are controlled by a switching means. During the analog mode of operation, the switching means causes the non-linear amplifier stage to amplify the RF signals. During the digital mode of operation, the non-linear amplifier amplifies the RF signal when there is a requirement for a relatively low power output. During the digital mode when there is a requirement for a relatively high level output, the switching means causes the non-linear power stage and the linear power stage to amplify the RF signals.
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Eisenzopf Reinhard J.
Ericsson GE Mobile Communication Holding, Inc.
Keough Timothy H.
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