AMPLITUDE LIMITING CIRCUIT CAPABLE OF CONTINUOUSLY ADJUSTING RECTIFYING SIGNAL AMPLITUDE, AND PASSIVE RADIO FREQUENCY LABEL

摘要

Dynamic continuous control on a conductive voltage of a threshold unit is implemented by connecting a bandgap reference voltage module unit in the threshold unit of an amplitude limiting circuit, and an output voltage value of the bandgap reference voltage module unit can be freely set according to work requirement of a circuit; when the voltage of an antenna end is higher than a sum of a bandgap reverence output voltage value and a threshold voltage of a serially connected MOS transistor, the threshold unit is conducted to open a grounding access, so that charges of the antenna end are output to the ground, a quantity of charges of the antenna end is reduced, and a rectified direct current voltage is reduced; when the voltage of the antenna end is lower than the sum of the bandgap reference output voltage value and the threshold voltage of the serially connected MOS transistor, the threshold unit is cut off to enable the grounding access to be in a cut off state, and the rectifying circuit rectifies all charges of the antenna end into a direct current power supply used by a load circuit, so that the continuous adjusting function on the amplitude limiting voltage is implemented, the amplitude-limited voltage values have continuity, and the precision and the stability of work voltage values of the circuits are ensured.