公开(公告)号：DE2404259A1

公开(公告)日：1974-08-08

申请号：DE2404259

申请日：1974-01-30

Applicant: IBM

Inventor： CORDI VINCENT ANTHONY ,  GURSKI CHESTER STANLEY

IPC: G06K17/00 ,  G06F7/06 ,  G06F13/00

公开(公告)号：DE2454745A1

公开(公告)日：1975-07-10

申请号：DE2454745

申请日：1974-11-19

Applicant: IBM

Inventor： CORDI VINCENT ANTHONY ,  GURSKI CHESTER STANLEY

IPC: G06F11/16 ,  H03K21/40 ,  H03K21/34

Abstract: This specification discloses a binary counter with two channels each consisting of a binary counter with ripple carry. Both channels store the same binary number, and to advance the count, a pulse is first applied to the input to one counter and thereafter applied to the input of the other counter. The output of each stage in one counter is Exclusive Ored with the output of the same stage in the other counter. The results of this Exclusive ORing is analyzed with additional logic circuitry to determine if the counts in the two channels are or are not equal. If they are not equal the analysis determines which of the counters contains the higher count, and if the difference in the counts is greater than one. This information is then used to find which of the channels is in error and whether the error is a transient error or an error resulting from a hard failure in one of the channels.