Title：Front-end circuit of analog-digital converter
Country：China
Patent No.：201310217847.0
Legal Status：Authorized
Inventor：Fule Li, Lili Xu, Chun Zhang, Zhihua Wang
Assignee：Tsinghua University
Address：Mailbox No. 82, Beijing 100084
Filing Date：2013-06-03
Issue Date：2016-06-01
Abstract：
The invention provides a front-end circuit of an analog-digital converter, comprising an MDAC (Multiple Digital-to-Analog Converter) branch circuit and an ADC (Analog-to-Digital Converter) branch circuit, wherein the MDAC branch circuit is used for receiving input voltage Vin and outputting residual voltage Vout; the ADC branch circuit is used for receiving the input voltage Vin and outputting an A/D (Analog/Digital) conversion result Dout. The aperture error of the circuit can be reduced on the basis of not increasing a clock phase, a dynamic comparator is adopted, a direct current through circuit does not exist in the circuit during working, and the power consumption of the system is reduced.
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