{
  "$type": "site.standard.document",
  "description": "A data transmission-reception unit which operates by means of energy of a received electromagnetic wave and serves as a main circuit, is provided with a sensor circuit (130) as an additional circuit, and a transponder (100) having a sensor power circuit (150) only to the sensor circuit is…",
  "path": "/patents/1103110",
  "publishedAt": "2002-07-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C23/041",
    "YOKOHAMA RUBBER CO LTD [JP]"
  ],
  "textContent": "A data transmission-reception unit which operates by means of energy of a received electromagnetic wave and serves as a main circuit, is provided with a sensor circuit (130) as an additional circuit, and a transponder (100) having a sensor power circuit (150) only to the sensor circuit is constituted. From a sensor charging circuit of an interrogator (230), an electromagnetic wave of a lower frequency different from a frequency of electromagnetic wave for data communication is radiated, or loop coil-shaped charging antennas (102,202) are electromagnetic-coupled to thereby charge a capacitor for the sensor power circuit. Thereby, a secondary battery and the capacitor such as a large scale capacitor can be easily charged from an outside, and further, a power consumption for the capacitor can be restrained.",
  "title": "Transponder, interrogator and system thereof"
}