Power amplifier for a cellular telephone

Details Power amplifier for a cellular telephone Power amplifier for a cellular telephone

H - Electricity

04

B

H04B 1/04 (2006.01) H03F 1/02 (2006.01) H04B 1/40 (2006.01)

Patent

CA 2075588

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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