Power management in an electromagnetic transponder

摘要

An electromagnetic transponder includes an oscillatory circuit, a battery and a first rectifier bridge. Alternating current input terminals of the rectifier bridge are connected to the terminals of the oscillatory circuit, and at least two rectifier elements of the rectifier bridge are controllable on the basis of the voltage supplied by the battery.

主权项

1. An electromagnetic transponder comprising:
an oscillating circuit; a first rectifying bridge having first and second alternating current (AC) input terminals connected across the oscillating circuit and having at least two controllable rectifying elements; a battery configured to provide an output voltage that controls the at least two controllable rectifying elements; a second rectifying bridge having first and second inputs and an output, the inputs being coupled across the oscillating circuit and an amplitude demodulator having an input coupled to the output of the second rectifying bridge.