Voltage limiting batteryless transponder circuit

摘要: A battery-less transponder (12) for transmitting stored measurement data to an interrogation device (10) is described. The transmits HF pulse calling up the data. includes a resonant circuit (14) tuned frequency of pulse, energy storage element (C3) which chargeable by rectification and in charged state furnishes supply voltage (12), limiting means (Z, R) at predetermined value. For detuning resonance thereof, component (C4) frequency-dependent impedance can be connected via switching (T) establishes connection dependence upon starting action R).