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PIPELINED ANALOG-TO-DIGITAL CONVERTER HAVING INPUT SIGNAL PRE-COMPARISON AND CHARGE REDISTRIBUTION
PIPELINED ANALOG-TO-DIGITAL CONVERTER HAVING INPUT SIGNAL PRE-COMPARISON AND CHARGE REDISTRIBUTION
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机译：具有输入信号预比较和电荷重新分配功能的流水线模拟到数字转换器
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摘要
A pipelined analog-to-digital converter having input signal pre-comparison and charge redistribution, comprising : one or more stages of pipelined structure units (1), each stage of pipelined structure unit (1) being used for quantifying an input signal; a first flash analog-to-digital converter (2) used for quantifying an allowance signal output by the last stage of pipelined structure unit and outputting a corresponding quantized value; and an adjustment output unit (3) used for combining the quantized values according to a connection order and outputting a complete quantization result. Pre-comparison and charge redistribution technologies are used for the input signal, and an integrated design is made using a pipelined structure. By using the input signal pre-comparison technology to perform most significant coarse quantization on different stages of pipelines, the number of comparators of different stages of pipelined sub-analog-to-digital converters is reduced and the low power consumption design is achieved. By using the charge redistribution technology, a sampling capacitance is separated from capacitances in a negative feedback amplifying circuit to simultaneously carry out signal sampling maintenance and allowance signal amplifying establishment, thus improving the conversion rate.
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