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:
Oct. 18, 1983
Filed:
Oct. 13, 1981
Martin H Graham, Berkeley, CA (US);
Rolm Corporation, Santa Clara, CA (US);
Abstract
An inductively coupled sensing circuit for use on a common cable communications system is disclosed. When used in conjunction with transceivers on a common cable system, the circuit is capable of both detecting signals and determining the direction of any colliding signals while the transceiver is operating. An inherently balanced bridge is created by coupling the transmitter lead between two elements of the sensing circuit. Each receiver is provided with means for determining the polarity of the sensing circuit, thereby determining the direction of any incoming signal. The use of this sensing circuit in a common cable system allows a hierarchy among cable users to be created thereby optimizing cable use. A left or right priority is determined by the polarity of an end signal transmitted at the end of each transmission.