{
  "$type": "site.standard.document",
  "description": "Systems and methods for a front-end circuit receiving a current from a photodiode receiving a signal light and ambient light have been disclosed. In a preferred embodiment the front-end circuit accommodates a photo diode current, generated by a signal light from an infrared LED diode in presence of…",
  "path": "/patents/1012841",
  "publishedAt": "2011-05-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01S7/4868",
    "DIALOG SEMICONDUCTOR GMBH [DE]"
  ],
  "textContent": "Systems and methods for a front-end circuit receiving a current from a photodiode receiving a signal light and ambient light have been disclosed. In a preferred embodiment the front-end circuit accommodates a photo diode current, generated by a signal light from an infrared LED diode in presence of a current generated by ambient light for a rain-sensing system. The circuit invented has a high dynamic range comprising a programmable transresistance amplifier, a switched capacitor programmable gain amplifier and a switched capacitor fourth- order oversampled sigma-delta A/D converter including an optimized digital filter. Furthermore coarse and fine IDACs are used to successively subtract a current generated by ambient light.",
  "title": "Infrared photocurrent front-end ADC for rain-sensing system with ambient light compensation"
}