DIGITAL SIGNAL PROCESSING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a digital signal processing system which can reduce the influence of a communication signal that is caused to an AD-converted signal. SOLUTION: A data communication circuit 2 and AD conversion circuit 3 operate on the basis of the system clocks which are generated by a system clock generation circuit 1. The frequency of communication signal S1 of the circuit 2 is N/2 times as high as the sampling frequency of the circuit 3. The circuit 2 functions to control the phase of the signal S1 so as to set the amplitude of the signal S1 to 0 in a sampling mode of the circuit 3. Thus, it is possible to reduce the influence of the signal S1 that is caused to an AD-converted signal.