{
  "$type": "site.standard.document",
  "description": "A wireless-power-transmission-system includes a bridge (16) with a tank-capacitor (Ctank) coupled thereto, a sense-resistor (Rsense) coupled between the bridge (16) and an input of a regulator (17), a switching-circuit (32) having first and second inputs coupled across the sense-resistor (Rsense)…",
  "path": "/patents/1411942",
  "publishedAt": "2023-04-19T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01R19/0092",
    "ST MICROELECTRONICS ASIA PACIFIC PTE LTD [SG]"
  ],
  "textContent": "A wireless-power-transmission-system includes a bridge (16) with a tank-capacitor (Ctank) coupled thereto, a sense-resistor (Rsense) coupled between the bridge (16) and an input of a regulator (17), a switching-circuit (32) having first and second inputs coupled across the sense-resistor (Rsense), and a gain-stage (33) having first and second inputs capacitively coupled to first and second outputs of the switching-circuit (32). An ADC (38) digitizes output of the gain-stage (33) by comparing the output to a reference voltage, and a temperature-independent current source (36) is coupled to a reference-resistor (R2) to generate the reference voltage. In a reset-phase, the switching-circuit (32) shorts the inputs of the gain-stage (33) to one another, and the gain-stage (33) shorts its inputs to its output. The switching-circuit (32), in a first-chopping-phase, couples the sense-resistor (Rsense) between the first and second inputs of the gain-stage (33), and in a second-chopping-phase, couples the sense-resistor (Rsense) in reverse between the second and first inputs of the gain-stage (33). The resistance of the reference-resistor (R2) tracks the sense-resistor (Rsense) across temperature.",
  "title": "HIGH ACCURACY LOW TEMPERATURE DRIFT HIGH-SIDE CURRENT SENSING HARDWARE AND METHOD"
}