Patent ID: 6380881
Filing Date: 2002-04-30
Classification: H03M

Abstract:
A successive approximation A/D converter comprising:an analog input terminal; a conversion result output terminal; voltage holding means connected to said analog input terminal and holding an analog input voltage input via said analog input terminal; voltage generating means for generating one or a plurality of voltages that serve as sources for producing comparison reference voltages subject to comparison with said analog input voltage; comparison reference voltage outputting means connected to said voltage generating means and outputting one or a plurality of comparison reference voltages in accordance with a control signal; comparing means comprising one or a plurality of comparators and comparing said analog input voltage with the one or the plurality of voltages output by said comparison reference voltage outputting means, so as to output a conversion result comprising at least 2 bits; and control means effecting error correction based on the conversion result output by said comparing means so as to output a final conversion result to said conversion result output terminal.