METHOD FOR REDUCTION OF SPURIOUS SIGNAL GENERATED BY DIGITAL SIGNAL PROCESSOR

摘要

PURPOSE: To reduce spurious signals which are produced by changes of power consumption due to the cyclic operation of a processor. CONSTITUTION: A digital signal processor that depends on a command code to be executed carries out a circulatively repeated program routine BP which is initialized by an interrupt INT. A 1st mean power consumption Im is produced for an operation time, and the operating time, which is shorter than a time between two continuous interrupts, of the routine BP is produced by power consumption of the digital signal processor. The processor performs a waiting routine AWAIT that produces mean power consumption of the processor which corresponds to the consumption Im in the program routine period between continuous program routines BP.