Patent ID: 8253467

Claim:
A phase signal generating apparatus, comprising: a phase signal generator configured to receive a plurality of first phase signals and a plurality of second phase signals, adjust a phase difference between the plurality of first phase signals and the plurality of second phase signals and generate a plurality of adjusted first phase signals and a plurality of adjusted second phase signals, based on a switch control signal and a phase control signal, a phase difference between the plurality of adjusted first phase signals and the plurality of adjusted second phase signals being the adjusted phase difference; and a phase controller configured to generate the switch control signal and the phase control signal based on phase information for the plurality of first phase signals and the plurality of second phase signals, wherein the phase signal generator includes, a switch unit configured to selectively apply the plurality of phase signals to a phase control unit in response to the switch control signal, the phase control unit configured to receive the selectively applied plurality of second phase signals, control magnitudes of the selectively applied plurality of second phase signals and generate a plurality of third phase signals in response to the phase control signal and the selectively applied plurality of second phase signals, and a phase buffer configured to mix the plurality of first phase signals with the plurality of third phase signals and output the plurality of adjusted first phase signals based on the mixed plurality of first phase signals and plurality of third phase signals.