Monitoring system for programmable implanted transponder

摘要

The monitoring system uses an interrogator transmitting an energising signal which is received by the transponder and used to provide a data signal incorporating temp. data and an identification code. The data signal is combined via phase shift keying with a carrier frequency which is higher than the frequency of the energising signal provided by the interrogator. Pref. the transponder has a programmable memory with a number of memory locations used to store data provided after mfr. of the transponder and accessed to provide the data signal.