专利名称：System and method for initiating
communications between a controller and aselected subset of multiple transponders ina common RF field
发明人：Gregory M. Smith申请号：US08/255088申请日：19940607公开号：US05434572A公开日：19950718
摘要：A system and method for initiating communication between a controller and aselected one or other subset of multiple transponders in a common RF field in whicheach transponder has a unique, (or commonly unique) preprogrammed ID number. Thecontroller transmits a series of commands/questions to the transponders and they eitherrespond, or do not respond, to the controller based on their ID number, with the non-responding transponders entering a reset state. The transponders respond to thecontroller in such a way that, if multiple transponders respond, the controller canrecognize that at least one transponder has responded and, for individual responses, thecontroller is not required to determine how many transponders have responded.Through use of the communications system and method disclosed, a sequence ofcontroller commands and transponder responses single out a selected individualtransponder or group of transponders based upon its particular ID number.
申请人：RAMTRON INTERNATIONAL CORPORATION
代理人：William J. Kubida
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