Highly linear power amplifier and radio applications thereof

Details Highly linear power amplifier and radio applications thereof Highly linear power amplifier and radio applications thereof

2006-08-08

2006-08-08

Nguyen, Duc M. (Department: 2618)

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

C455S127300, C455S126000, C330S310000, C330S311000, C330S252000

Reexamination Certificate

active

07088969

ABSTRACT:
A single ended highly linear power amplifier includes a component, a 1sttransistor pair, and a 2ndtransistor pair. The 1stand 2ndtransistor pairs are coupled in series with the component, which may be a resistor, inductor and/or linearly loaded transistor, where the node coupling the component to the 1stand 2ndtransistor pairs provides the output of the single-ended highly linear power amplifier. The 1sttransistors of the 1stand 2ndtransistor pairs are coupled to receive an input signal. The 2ndtransistors of the 1stand 2ndtransistor pairs are each coupled to receive a separate enable signal. The transistor pairs are enabled via their corresponding enable signal to change the gain of the power amplifier with negligible effects on the linearity of the power amplifier. A differential power amplifier includes the single ended power amplifier and a complimentary mirror image of the single ended power amplifier.

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patent: 6804500 (2004-10-01), Yamaguchi

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