| 摘要 |
A method and apparatus for calibrating a sigma-delta analogue-to-digital converter (ADC) which comprises an n-bit feedback digital-to-analogue converter as part of its feedback loop, the digital-to-analogue converter (DAC) having a plurality of cells and including at least one calibration digital-to-analogue converter. The calibration DAC may comprise a single global calibration digital-to-analogue converter associated with a plurality of cells. The apparatus may further comprise a state machine which receives a portion of the digital output of the ADC in accordance with a sequence of values measured during a calibration process. The sequence of values may be associated with a cell of the feedback converter. |
