Power amplifier for a cellular telephone
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United States of America Patent
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-
Dec 29, 1992
Grant Date -
N/A
app pub date -
Aug 8, 1991
filing date -
Aug 8, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
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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Family
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