Patent ID: 7372359

Claim:
An electromagnetic transponder including: a parallel oscillating circuit adapted to extracting a supply signal from a radiated field; in parallel with the oscillating circuit, several branches each including a programmable polysilicon resistor and a switch, each programmable polysilicon resistor storing a portion of a code stored in the transponder, each programmable polysilicon resistor having a nominal resistance value or a programmed resistance value that establishes a code state of the code portion without utilizing a switch to establish the code state of the code portion; and a cyclic control element for successively turning on the switches to read the code state of the code portion stored in the programmable polysilicon resistor of each of the branches; and programming of the code portion in the programmable polysilicon resistor being controlled by forcing a current in the resistor which is greater than the current for which its value is maximum and causing an ineversible decrease in resistance of the programmable polysilicon resistor, for each programmable polysilicon resistor that is programmed.