Patent ID: 7869764

Claim:
An electronic circuit for a high-frequency switch for opening an antenna resonance circuit of an RFID system, wherein the high-frequency switch, which is composed of at least two PIN diodes, can be opened and closed by d.c. voltages, comprises: a rectifier circuit, which is disposed outside the antenna resonance circuit, generates the blocking voltage for opening the high-frequency switch from the high-frequency supply voltage, the tapping operation, which takes place via at least one connecting line (b), being decoupled with respect to direct current from the rectifier circuit, and the rectifier circuit is designed such that it generates a blocking voltage whose value corresponds at least to the peak-to-peak value of the high-frequency voltage to be switched, and the blocking voltage is conducted via the same electric connecting line (a) via which the high-frequency supply voltage and a closing voltage are also conducted to the antenna of the RFID system, injection of the blocking voltage taking place with an high impedance, and resistors are connected in parallel with the respective PIN diodes which are series-connected with respect to direct current.