发明授权
- 专利标题: Analog to digital converters with extended dynamic range
- 专利标题(中): 具有扩展动态范围的模数转换器
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申请号: US980324申请日: 1997-11-28
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公开(公告)号: US5969659A公开(公告)日: 1999-10-19
- 发明人: Brent F. Balch , Stephen W. Embling , Fadi Ayoub , David Fallin
- 申请人: Brent F. Balch , Stephen W. Embling , Fadi Ayoub , David Fallin
- 申请人地址: FL Boca Raton
- 专利权人: Sensormatic Electronics Corporation
- 当前专利权人: Sensormatic Electronics Corporation
- 当前专利权人地址: FL Boca Raton
- 主分类号: H03M1/18
- IPC分类号: H03M1/18 ; H03M1/12
摘要:
An arrangement for improving the operation of an analog to digital converter (A/D), which can form part of an integrated circuit, the A/D converter being coupled to a reference voltage and having a plurality of input pins associated therewith comprises: a resistor divider having a plurality of resistors coupled in series, the resistor divider having an upper node coupled to a source of voltage to be converted, having a lower node coupled to a source of reference potential and having a plurality of intermediate nodes; and, each of the upper intermediate nodes being coupled to a respective one of the input pins of the A/D converter. The A/D converter can have enhanced resolution and/or an extended dynamic range when the voltage level being tested is divided arid the reference voltage is reduced. A corresponding method comprises the steps of: successively scaling down a voltage to be converted to a series of stepped down voltage levels; applying the successively stepped down voltage levels to respective ones of the input pins; and, sequentially scanning and acquiring a plurality of scaled A/D converter values from the input pins.
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