The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 1981
Filed:
Nov. 30, 1979
Applicant:
Inventors:
Kazuo Ogawa, Tokyo, JP;
Eiji Suzuki, Kawasaki, JP;
Assignee:
Fujitsu Limited, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
371 49 ; 371 22 ;
Abstract
A system for monitoring bit errors in digital differential phase modulation communications, comprising a parity counter for counting '1' pulses among n succesive bits at intervals of n bits (n is a positive integer) in a pulse train and for producing a parity bit. The parity bit is located in each side of a transmitter and a receiver, whereby, the parity bit counted in the receiver and the parity bit transmitted from the transmitter to the receiver are compared with each other.