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    • 6. 发明授权
    • Method and apparatus for digital calibration of an analog-to-digital converter
    • 一种模数转换器的数字校准方法和装置
    • US07378999B1
    • 2008-05-27
    • US11714361
    • 2007-03-06
    • John McGrathAnthony J. Collins
    • John McGrathAnthony J. Collins
    • H03M1/10
    • H03M1/1028H03M1/14H03M1/46
    • Method and apparatus for digital calibration of an analog-to-digital converter (ADC). One example relates to calibrating an analog-to-digital (A/D) conversion system having an N-bit resolution. The A/D conversion system includes an ADC that generates an output having N most significant bits (MSBs) and M least significant bits (LSBs) (i.e., an N+M bit resolution). An offset calibration circuit is configured to determine an offset in the ADC and to compensate the N+M bit output using the offset to provide an N+M bit offset corrected output. A gain calibration circuit is configured to determine a gain correction factor for the ADC and to compensate the N+M bit offset corrected output using the gain correction factor to provide an N bit offset and gain corrected output.
    • 用于模数转换器(ADC)数字校准的方法和装置。 一个例子涉及校准具有N位分辨率的模数(A / D)转换系统。 A / D转换系统包括产生具有N个最高有效位(MSB)和M个最低有效位(LSB)(即N + M位分辨率)的输出的ADC。 偏移校准电路配置为确定ADC中的偏移量,并使用偏移来补偿N + M位输出,以提供N + M位偏移校正输出。 增益校准电路被配置为确定ADC的增益校正因子,并且使用增益校正因子来补偿N + M位偏移校正输出,以提供N位偏移和增益校正输出。