METHOD OF DETERMINING SUPPLY VOLTAGE TO DIGITAL CIRCUIT, METHOD OF SETTING SUPPLY VOLTAGE TO DIGITAL CIRCUIT, ELECTRONIC APPARATUS, AND SUPPLY VOLTAGE DETERMINATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a novel method for reducing the power consumption of a general digital circuit.;SOLUTION: A host CPU 130 as a processor of a mobile phone 100 applies a predetermined input test signal to a GPS reception portion 110 as a digital circuit, and inspects the operation of the GPS reception portion 110 on the basis of an output signal from the GPS reception portion 110 responding to the input test signal. Furthermore, a voltage indication signal is outputted to a GPS variable voltage portion 190 to change an inspection voltage supplied to the GPS reception portion 110. Then the inspection of the GPS reception portion 110 and the change of the inspection voltage are repeated to determine a supply voltage to the GPS reception portion 110.;COPYRIGHT: (C)2011,JPO&INPIT