DIGITAL FILTER AND DIGITAL SIGNAL FILTERING METHOD

摘要

PURPOSE: A digital filter and a digital signal filtering method are provided to be capable of removing voltage peak from a digital input signal at any time. CONSTITUTION: A digital filter comprises a rising edge detector, a falling edge detector, and a delay line(T) for delaying a digital input signal. The rising edge detector generates a rising edge display signal(P) by using the delayed digital input signal. The falling edge detector generates a falling edge display signal(N) by using the delayed digital input signal. The digital filter further includes the first mixing part(M1) for generating a rising edge filter display signal(P') by using the digital input signal and the rising edge display signal, the second mixing part(M2) for generating a falling edge filter display signal(N') by using the digital input signal and the falling edge display signal, and the third mixing part(M3) for generating a digital output signal by using the rising and falling edge filter display signal.