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Integrated implementation of a collector boost scheme and method therefor

Image Number 6 for United States Patent #7348847.

A collector boost circuit is disclosed for providing a first voltage in a first mode of operation to a power amplifier, and a second voltage in a second mode of operation to the power amplifier. The collector boost circuit uses a switch and an indicator signal for triggering the switch between the first and the second mode of operation. The second voltage is a boosted voltage greater than the first voltage and is provided during peak excursions through a boost capacitor.

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