Patent ID: 8811556
Filing Date: 2014-08-19
Classification: H04B,H04L

Abstract:
1. A receiving circuit which receives, via a transmission path formed by magnetic coupling of inductors at a transmission side and a receiving side, a signal corresponding to transmission data having a data rate equal to or higher than a self-resonant frequency of the inductors, the receiving circuit comprising: a received data acquisition circuit which performs a decision-feedback equalization process on the received signal to obtain a shaped signal and, according to a sampling clock, performs sampling of the shaped signal with a same sampling rate as the data rate to obtain data samples; and a clock recovery circuit which corrects the sampling clock so that the received data acquisition circuit performs sampling at a correct sampling timing, wherein the clock recovery circuit includes: a midpoint sample acquisition circuit which performs sampling of the received signal at an intermediate timing of the sampling timing of the received data acquisition circuit to obtain a midpoint sample; and a phase adjustment circuit which adjusts a phase of the sampling clock, based on the data samples and the midpoint sample.