Wireless transmitter having multiple power amplifier drivers...

Details Wireless transmitter having multiple power amplifier drivers... Wireless transmitter having multiple power amplifier drivers...

2005-03-31

2009-06-16

Le, Lana N (Department: 2618)

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

C455S114200, C330S12400D

Reexamination Certificate

active

07548733

ABSTRACT:
A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second power amplifier drivers (PADs) having respective first and second non-linear phase responses. The first non-linear phase response is based on a first bias applied to the first PAD, and the second non-linear phase response is based on a second bias applied to the second PAD. The first and second PADs are coupled in parallel to provide a combined substantially linear phase response. According to an embodiment, the first and second PADs have respective first and second average input capacitances. Signal swings about the first and second biases vary the respective first and second average input capacitances, which may be combined to provide a combined average input capacitance that is substantially insensitive to the signal swings about the first and second biases.

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