Patent ID: 7576616
Filing Date: 2009-08-18
Classification: G06F

Abstract:
1. A phase controlling apparatus which controls phases of signals which are output from a plurality of signal sources corresponding to first phase information which indicates a phase of a predetermined signal, the apparatus comprising: phase information storing means for storing second phase information which indicates a phase of a signal which is output from each of the plurality of signal sources; and phase controlling means for changing a phase of a signal which is output from at least one of the plurality of signal sources corresponding to the second phase information stored in the phase information storing means to control a difference of the phases of signals which are output from the plurality of signal sources, wherein when a value of a signal which is output from a signal source under control becomes zero, the phase controlling means controls the signal source to stop outputting the signal and after a predetermined period of time has elapsed, the phase controlling means controls the signal source to start outputting the signal.