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模拟子样电压在A/D转换器中的数字化转换,简单地说就是:在跟踪采样期间,保持积分器按一定的比例保持输入子样值,且予以反相;在比较期间,比较器将T网数模转换输出电压与保持积分器输出电压进行比较,先确定符号位,然后逐位试码判定其它位的取舍;在转换结束的瞬间,T网中符号位和其它数模转换保留位的码值即为模拟子样电压数字化的数码(正子样时为原码,负子样时为反码或补码)。可见,T网数模转换输出电压的精度是决定A/D转换的主要因素,而T网数模转换输出电压的精度和
The digital conversion of the analog sub-sample voltage in the A / D converter simply means that during the tracking sample, the integrator is kept at a certain ratio and the input sub-samples are inverted and inverted; during the comparison, the comparator T net digital-analog conversion output voltage and maintain the integrator output voltage comparison, first determine the sign bit, and then try to judge the other bit by bit bit selection; at the end of the conversion, T net sign bit and other digital-analog conversion reserved bits The code value is the analog digital voltage digital sample (positive sample when the original code, negative samples for the anti-code or complement). Can be seen, T net digital-analog conversion output voltage accuracy is the main factor in determining A / D conversion, and T net digital-analog conversion output voltage accuracy and