A baseband signal phase-compensation technique offsets undesirable phase shifts,
or changes in phase shift, introduced in a transmit signal when changing transmit
amplifier operating modes. Such mode changes may, for example, entail switching
amplifier stages in and out of an amplification signal path. A phase compensator
selectively operates on the baseband signal or signals to subtract out an amount
of phase shift equal to the amount of phase shift added by switching one or more
additional amplifier stages into the amplification signal path. Compensating baseband
signals is this manner may be particularly valuable for the reverse link signal
of a mobile terminal operating in a wireless communication environment such as
CDMA2000. In such environments, abrupt phase shift changes in the transmit signal
associated with transmit signal power control are undesirable.
