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. 11, 1983
Filed:
Apr. 20, 1981
V Bruce Hunt, Menlo Park, CA (US);
Other;
Abstract
In a data communications systems having a communications channel (3) for interconnecting a plurality of transceivers (1) and (2), each of said transceivers (1) and (2) including means (80) for transmitting a signal having transitions, there is provided a means (20) responsive to the presence and absence of a signal on said communications channel (3) during a transition of a signal transmitted by said transmitting means (80) for providing a collision detected (CD) signal if there is destructive interference with the transmitted signal on said communication channel (3) during a transition of said transmitted signal and means (48) responsive to said CD signal for terminating said transmitting of said signal. In the event the channel (3) is busy prior to a transmission from the transmitter (80) there is provided a carrier sense circuit (14) for indicating the channel is busy and a non-persistent control circuit (45) and a random number generator (90a) and a delay circuit (90b) responsive to the carrier sense circuit (14) and the collision detector circuit (20) for interrupting and delaying the transmitting of each of the transceivers (1) and (2) for a random period of time.