公开(公告)号：JP2003264454A

公开(公告)日：2003-09-19

申请号：JP2002372307

申请日：2002-12-24

Applicant: ST MICROELECTRONICS INC

Inventor： CHOW JAMES ,  LAY KHIN ,  WEN KENNY D

IPC: H03K17/00 ,  G11C11/409 ,  G11C27/02 ,  H03F3/45 ,  H03K3/356 ,  H03K17/687 ,  H04L25/02

Abstract: PROBLEM TO BE SOLVED: To provide an electric signal sampling circuit with enhanced accuracy. SOLUTION: A differential data sampling circuit is provided for sampling an input signal line with precise timing so as to provide reduced sensitivity to noise. The differential data sampling circuit includes a latch circuit for initially sampling a differential data signal in response to a first strobe signal. The latch circuit operates to rapidly capture the signal level present on the input signal line. The output of the latch circuit is sampled by a strobe circuit in order to sample and hold the output of the latch circuit based on a second strobe signal. In preferred embodiments, the latch circuit has a high input impedance. A digital data receiver including such a differential data sampling circuit is also provided. COPYRIGHT: (C)2003,JPO