发明授权
- 专利标题: Methods and apparatus for calibrating pipeline analog-to-digital converters
- 专利标题(中): 用于校准管道模数转换器的方法和装置
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申请号: US13558136申请日: 2012-07-25
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公开(公告)号: US08754794B1公开(公告)日: 2014-06-17
- 发明人: Wei Li , Weiqi Ding , Wilson Wong
- 申请人: Wei Li , Weiqi Ding , Wilson Wong
- 申请人地址: US CA San Jose
- 专利权人: Altera Corporation
- 当前专利权人: Altera Corporation
- 当前专利权人地址: US CA San Jose
- 代理机构: Treyz Law Group
- 代理商 Jason Tsai
- 主分类号: H03M1/10
- IPC分类号: H03M1/10
摘要:
An integrated circuit with a pipeline analog-to-digital (A/D) converter and associated calibration circuitry is provided. The A/D converter may include multiple series-connected pipeline stages at least some of which are implemented using a switched capacitor configuration. The calibration circuitry may include an analog error correction circuit, a digital error correction circuit, and a calibration control circuit for coordinating the operation of the analog and digital error correction circuits. During calibration operations, the analog error correction circuit may be used to suitably adjust a gain setting for each pipeline stage, whereas the digital error correction circuit may be used to compute a code offset value for each pipeline stage. Calibration may proceed from a least-significant-bit pipeline stage towards a most-significant-bit pipeline stage, one stage at a time.
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