Transponder and corresponding operating method reducing emitted noise

摘要

In a system comprising a transmitter/receiver and a large number of transponders, interference from noise during transmitter/receiver reception may be reduced by supplying each transponder with an oscillator and means (35,36,38a,38b) to control clock extractor (31), oscillator (34), frequency divider (32) and sequencer (33). The means are applied during periods of transmitter/receiver reception to all except one selected transponder <??>An Independent claim is also included for: A transponder which has an internal oscillator and means of switching the synchronising unit during transmitter/receiver reception