Eletronic circuit of low power consumption, and power consumption reducing method

摘要

An electronic circuit of low power consumption and a power consumption reducing method are devised to attain the power consumption reduction without using the scheme of anticipation which incurs the limitation in the effect of power consumption reduction. The electronic circuit includes at least one of a power supply voltage control circuit which varies the power supply voltage in response to a voltage control signal or a clock frequency control circuit which varies the frequency of a clock signal in response to a frequency control signal, a control circuit which produces at least one of the voltage control signal or the frequency control signal, and a data processing circuit which processes an input data signal by being supplied with at least one of the power supply voltage or the clock signal. The control circuit produces the voltage control signal or the frequency control signal based on information of process amount corresponding to the input data signal and indicative of the amount of data processing executed by the data processing circuit.