INTERFACE APPARATUS FOR DIGITAL VCR EQUALLIZER AND DESIGN METHOD OF THERFOR

摘要

PURPOSE: A device for interfacing an equalizer of a digital VCR(Video Cassette Recorder) and a designing method thereof are provided to supply a digital signal to the equalizer through precisely digitizing and restoring timing of an analog signal from the digital VCR. CONSTITUTION: A low band filter and amplifier(2) eliminates noise in a VCR deck(1) while amplifying. An A/D(Analog/Digital) converter(3) converts a signal from the amplifier into digital. An equalizer and loop filter(4) compensates difference between wave times from the A/D converter. A D/A converter(5) converts the compensated signal into an analog signal. A level and scale change(6) converts a signal from the D/A converter according to an input condition of a voltage generator. A voltage control oscillator(7) converts an output frequency according to change in applied voltage from the scale change. Then, noise in a VCR deck is eliminated while compensating for frequency and phase difference between the input frequency and the voltage oscillator.