公开(公告)号：DE3264622D1

公开(公告)日：1985-08-14

申请号：DE3264622

申请日：1982-03-18

Applicant: IBM

Inventor： TABER LOUIS ,  EAST DON GAYLORD

IPC: G11B20/16 ,  G11B20/14 ,  H04L7/00 ,  H04L7/033 ,  H04L7/02 ,  G11B5/09

Abstract: A clocking system is disclosed for a multichannel data transmission system which includes a temporary storage medium, such as magnetic tape. The system is an improvement over prior art systems which utilize a separate phase locked loop clock correction circuit for each channel. The described system utilizes a single clock for the multiple channels which operates at a frequency F that is an integral multiple of the channel baud rate. Means are provided to continually monitor the phase error of each channel and a composite correction signal is derived and applied to the clock signal which is proportional to the average of the phase errors of the individual channels.