Invention Grant
US07889816B2 Clock and data recovery circuit and communications apparatus including the clock and data recovery circuit 失效
时钟和数据恢复电路和通信设备包括时钟和数据恢复电路

Clock and data recovery circuit and communications apparatus including the clock and data recovery circuit
Abstract:
A clock and data recovery circuit that includes a unit to output N-phase clocks each of which has a phase shifted from the others by a time T2 obtained by dividing a clock period P1 by N, a unit to obtain sampling data serially transferred every time T2, a unit to convert the sampling data into first N-bit parallel data every period P1, a unit to convert the first N-bit parallel data into second N-bit parallel data indicating a change point in the sampling data, and a unit to use the second N-bit parallel data as input of phase information and output third N-bit parallel data indicating substantially a center position of the change point. N is an integer greater than 2 and data of the first N-bit parallel data at a position equal to the position indicated by the third N-bit parallel data is determined to be recovered data.
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