Method and apparatus for correcting asymmetric waveform level in consideration of asymmetric error after the decimal point

摘要

A method and an apparatus for correcting an asymmetric waveform level in consideration of an asymmetric error after the decimal point are disclosed. A zero-crossing detector for correcting an asymmetry signal detects a zero-crossing point and a decimal-point asymmetry detector calculates a jitter value required for correcting the asymmetry waveform level. A counted value decider decides a counted value using the zero-crossing point detected by the zero-crossing detector, the jitter value and sign bits of sample signals according to a system clock period. Values after the decimal point are reflected to a counter, and thus the asymmetry can be detected more accurately to improve the performance.