{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "Provide are a power reception device, a wearable device, and a non-contact power feeding system that can improve the transmission efficiency while suppressing upsizing of the circuit thereof. A power reception device () includes a variable capacitance circuit () and a power reception coil ()…",
  "path": "/patents/1281885",
  "publishedAt": "2021-01-21T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J50/12",
    "Daihen Corporation"
  ],
  "textContent": "Provide are a power reception device, a wearable device, and a non-contact power feeding system that can improve the transmission efficiency while suppressing upsizing of the circuit thereof. A power reception device () includes a variable capacitance circuit () and a power reception coil () constituting a resonance circuit together with the variable capacitance circuit (), in which the variable capacitance circuit () includes a first capacitor (C) and a second capacitor (C) connected in parallel to each other, a first switch (Tr) connected in series to one end side of the first capacitor (C), and a switch control circuit () that controls turning on and off of the first switch (Tr) and includes a first comparator (OP) that supplies a first control voltage to the first switch (Tr) according to a comparison result between a reference voltage and an AC voltage applied to the second capacitor (C).",
  "title": "Power Reception Device, Wearable Device, and Non-Contact Power Feeding System"
}