Patent ID: 8270225
Filing Date: 2012-09-18
Classification: G01R

Abstract:
1. A data receiving circuit that receives bit stream data subjected to bit stream transmission by using a strobe signal, the data receiving circuit comprising: a variable delay circuit that provides a delay to the strobe signal; a latch circuit that latches each bit data included in the bit stream data by using the strobe signal delayed by the variable delay circuit; and a delay control unit for adjusting the delay amount provided to the strobe signal by the variable delay circuit, which statistically acquires, while a calibration operation is being executed in which a known calibration pattern is inputted as the data, output latch data of the latch circuit, and which adjusts the delay amount such that probability of occurrence of one of 1 and 0 in the output latch data approaches a predetermined value, wherein the variable delay circuit adjusts the delay amount such that the data is latched by the strobe signal thus delayed, at a timing of transition defined by either one of a positive edge and a negative edge of each bit data included in the bit stream data, and the probability of occurrence of one of 1 and 0 falls within a predetermined range, the center of which is 50%.