METHOD AND APPARATUS FOR POWER SUPPLY CONTROL

摘要

When reception of a data signal is detected, a power supply control start signal is generated. After a predetermined period of time, the data signal is output to a signal processing unit. A power supply control signal for suppressing a fluctuation in power supply output voltage of the signal processing unit is generated until a processing completion signal output from the signal processing unit is received after the generation of the power supply control start signal. Alternatively, the received data signals are classified into some groups and the groups of signals are output to respective signal processing units. When an active set signal related to any group is received and a plurality of the active set signals simultaneously become active, a power supply control start signal is generated. A power supply control signal for suppressing a fluctuation in power supply voltage of the signal processing unit is generated until any one of the active set signals becomes inactive after the generation of the power supply control start signal.