US 11,973,510 B2
Capacitance-to-digital conversion circuit, a capacitance-to-digital conversion method and an electronic chip
Le Ye, Hangzhou (CN); Heyi Li, Hangzhou (CN); Ru Huang, Hangzhou (CN); Hao Zhang, Hangzhou (CN); and Yuanxin Bao, Hangzhou (CN)
Assigned to HANG ZHOU NANO CORE CHIP ELECTRONIC TECHNOLOGY CO., LTD, Zhejiang (CN)
Filed by HANG ZHOU NANO CORE CHIP ELECTRONIC TECHNOLOGY CO., LTD, Hangzhou (CN)
Filed on May 24, 2022, as Appl. No. 17/751,900.
Claims priority of application No. 202110571568.9 (CN), filed on May 25, 2021.
Prior Publication US 2022/0385296 A1, Dec. 1, 2022
Int. Cl. H03M 1/06 (2006.01)
CPC H03M 1/0604 (2013.01) 10 Claims
OG exemplary drawing
 
1. A capacitance-to-digital conversion circuit, comprising a first module, a comparator and an adaptive range-shift module, in which
the first module comprises a successive approximation unit, a first adder, a first digital-to-analog converter, a second adder, a third adder, and a first integrating unit connected in series, and the first module further includes a second digital-to-analog converter connected to the third adder,
the comparator, the adaptive range-shift module and the first adder are connected in series; and
the comparator is connected to the second digital-to-analog converter.