| 摘要 |
PURPOSE: An analog-digital converter of a successive approximation register(SAR) type capable of error correction and an error correction method are provided, which can detect an error of an upper bit and can correct the error of the upper bit. CONSTITUTION: The analog-digital converter includes a comparator, a SAR register(200), a control part and a DAC(Digital-Analog Converter). And it further includes a correction control part(220) which determines the correction as to the first conversion result in response to the other bits(SAR£1:N-1|) excepting an MSB(Most Significant Bit) of the SAR register after the first conversion operation, and outputs a correction enable signal(CORRECTION ENABLE) and the fist and the second correction control signal(INC,DEC) to the SAR register according as whether to correct. The SAR register can subtract or add a weighted value of an LSB(Least Significant Bit) to the value of the SAR register in response to the first and the second correction control signal.
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