AUTOMATIC MINUTE ADJUSTMENT APPARATUS OF DIGITAL TELEVISION

摘要

PURPOSE: An automatic minute adjustment apparatus is provided to perform the correct tuning through a minute adjustment by enabling the adjustment in a frequency range over a frequency range from minus 250KHz to 250KHz. CONSTITUTION: A tuner(402) has first and second local oscillators. A channel decoder(406) outputs an error value with respect to the distortion of an RF frequency tuned through the tuner(402). A microcomputer(422) inputs the error value outputted from the channel decoder(406) and controls the second local oscillator of the tuner(402) to reduce the error value. The tuned RF frequency signal is rectified through a SAW filter(403), converted into a baseband signal through an IF module(404), converted to a digital signal through an A/D converter(405) to be outputted to the channel decoder(406).