公开(公告)号：CA946518A

公开(公告)日：1974-04-30

申请号：CA99920

申请日：1970-12-07

Applicant: IBM

Inventor： FIORINO BENJAMIN C ,  RODRIGUEZ JUAN A

IPC: H03D13/00 ,  H03K5/26 ,  H04L7/00 ,  H04L7/033 ,  H03B3/04

Abstract: A digital time sampling phase comparator for use in a data receiving system to generate error correction pulses which are used to synchronize the generation of clock pulses with incoming data pulses. The phase comparator is time sampling because it generates error correction pulses whose time durations are equal to the time differences between transitions of input data pulses and reference transitions of generated clock pulses. In addition, the comparator has a noise rejection feature which removes from the correction pulses errors caused by random noise in the input data. Noise rejection is achieved by generating pulses for each positive and negative voltage transition of the input data pulses and ANDing these generated pulses with either a data or an inverted data pulse, depending upon whether the detected transition is positive or negative.

公开(公告)号：CA906623A

公开(公告)日：1972-08-01

申请号：CA906623D

Applicant: IBM

Inventor： FIORINO BENJAMIN C ,  RODRIGUEZ JUAN A

IPC: G01P3/58 ,  G11B15/46 ,  H03G3/34 ,  H03K5/13