Title：Circuit, measuring device and signal measuring method for reducing chopping amplifier output ripple
Country：China
Patent No.：201210562798.X
Legal Status：Authorized
Inventor：Hui Jiang, Ziqiang Wang, Chun Zhang, Songping Mai, Hong Chen, Hanjun Jiang, Zhihua Wang
Assignee：Graduate School at Shenzhen, Tsinghua University
Address：Tsinghua Campus, Xili University Town, Nanshan District, Shenzhen City 518055, Guangdong Province
Filing Date：2012-12-21
Issue Date：2015-08-19
Abstract：
The invention discloses a circuit for reducing chopping amplifier output ripple. The circuit comprises a switching capacitor sampling summing circuit, wherein the switching capacitor sampling summing circuit comprises a first switching capacitor circuit, a second switching capacitor circuit and a summing circuit, the second switching capacitor circuit and the first switching capacitor circuit are connected in parallel and have the same structure, and output ends of the first switching capacitor circuit and the second switching capacitor circuit are connected to the input end of the summing circuit. The invention also discloses a measuring device and an amplifying signal measuring method. The circuit for reducing chopping amplifier output ripple is used. The chopping amplifier output ripple width is reduced, an analog low-pass filter is not required, the energy consumption and the area are saved and the design of the circuit is simplified.
Patent Certificate：
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