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:
Aug. 11, 1998
Filed:
Mar. 29, 1996
John Houldsworth, Fairfax County, VA (US);
Joseph Ingram Field, Jr, Fairfax County, VA (US);
Geoffrey Bollinger Cox, Loudoun County, VA (US);
Eurotherm Controls, Inc., Reston, VA (US);
Abstract
A pulse density signaling input/output (PDSIO) scheme is implemented to provide a two-way, two-wire hybrid analog/digital communications system. PDSIO signals are sent as logic pulses from a 'master' port to one or more 'slave' ports over a twisted pair. From one to a predetermined maximum number of logic pulses are transmitted over two wires at baseband by a master port during a defined period. The modulation used by the master port is pulse density modulation at base band so that the transmitted signal appears to be a d.c. logic signal. The pulses transmitted to the slave port are also used to power the slave port. The slave port communicates with the master port over the same two wires using a pulsed current modulation that multiplexes data on the pulse signals from the master port.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile