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.