SENSOR TAG, SENSOR TAG DEVICE, POWER RECEIVING CIRCUIT, SENSOR TAG DEVICE POWER SUPPLY METHOD

摘要

It is possible to provide a sensor tag device capable of detecting event data by a sensor tag all the time even when no radio wave is received, saving power supply for a microprocessor, and enlarging the radio communication distance. The sensor tag device includes generation means (6, 7) using one or more environment changes, power supply voltage rise control means (8), and power supply synthesis means (9). When an event, i.e., an environment change has occurred, power is supplied to the microprocessor (12) and event data is stored in the microprocessor (12). A power reception circuit having a transmission/reception antenna, a built-in power reception circuit and a microprocessor and capable of bidirectional communication by radio waves is combined with a stab resonance RF boost circuit and a ladder boost rectification circuit.