APPARATUS FOR TESTING SIGNAL PROCESSING DEVICE AND TESTING METHOD THEREOF, PARTICULARLY FOR SHORTENING TESTING TIME BY ELIMINATING STANDBY TIME FOR DISCHARGING CAPACITOR

摘要

PURPOSE: An apparatus of testing a signal processing system and a testing method thereof are provided to shorten a test period by performing a test from a point of time when an analog signal for the test passes through an analog ground by eliminating a standby time for discharging a capacitor. CONSTITUTION: A demodulator(600) includes a plurality of switches operated by a clock having a predetermined period and a plurality of capacitors connected to the switches in order to integrate analog audio signals and output digital audio signal corresponding to the integrated signals. A filter(610) is used for filtering the digital audio signals. A test controller is used for outputting a control signal for discharging a capacitor to the modulator according to a test mode signal.