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:
May. 17, 1988
Filed:
Oct. 27, 1982
Applicant:
Inventors:
Masahiko Ise, Kashihara, JP;
Katsuyuki Machino, Nara, JP;
Hidehiko Tanaka, Tenri, JP;
Takaaki Okamoto, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
3403 / ; 375 99 ;
Abstract
A signal transmission system over building or house wiring includes noise reduction circuit to reduce noise including asynchronous noise and synchronous noise. Received pulses are sampled in a given interval and the number of continous pulses in question during the sampling interval is counted. The pulses in question are ignored as noise if the number of pulse counting is less than a predetermined reference count and the pulses are treated as true signals if the number is more than said reference count.