Dekodierender Entzerrer.

摘要

Disclosed is a decoding equalizer of high definition television signal transmission mode, such as MUSE, and a subrange-type A/D converter suitable for the equalizer. The decoding equalizer samples input data in equalization at a frequency twice the sampling frequency of the trunk system, with the equalizing A/D conveter (1, 9) operating at a lower reduction and higher speed than the A/D converter (1,8) for the trunk system. The subrange-type A/D converter includes A/D converters in multiple stages (204, 212), with their driving clock frequencies being in certain relationship so that they are used commonly for the A/D conversion of the high definition television signal and the A/D conversion of a test signal for detecting the transmission characteristics.