Invention Grant
- Patent Title: Wide range charge balancing capacitive-to-digital converter
- Patent Title (中): 宽范围电荷平衡电容式数字转换器
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Application No.: US13144046Application Date: 2010-01-12
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Publication No.: US08410969B2Publication Date: 2013-04-02
- Inventor: Mathias Krauss , Maha Jaafar , Ke Wang , Eric Hoffman
- Applicant: Mathias Krauss , Maha Jaafar , Ke Wang , Eric Hoffman
- Applicant Address: DE Dresden
- Assignee: Zentrun Mikroelektronic Dresden AG
- Current Assignee: Zentrun Mikroelektronic Dresden AG
- Current Assignee Address: DE Dresden
- Agency: Heslin Rothenbeg Farley & Mesiti P.C.
- Agent Kevin P. Radigan, Esq.
- International Application: PCT/US2010/020741 WO 20100112
- International Announcement: WO2010/081136 WO 20100715
- Main IPC: H03M1/12
- IPC: H03M1/12

Abstract:
A capacitive-to-digital converter is provided which includes: sensor, offset and reference capacitors, an integrator circuit and a demodulation circuit. The sensor capacitor is switched according to a first clock and the offset capacitor according to a second clock, which has a higher switching frequency. The reference capacitor is switched according to a return signal from the converter's output. The integrator circuit includes an integrator capacitor, and has first and second nodes, with the sensor, offset and reference capacitors each being switched to the first and second nodes based on the respective first clock, second clock or return signal. The demodulation circuit receives and converts output of the integrator circuit into a digital output. The higher frequency clocking of the offset capacitor allows for a reduction in capacitance of the offset, reference or integrator capacitor, and the multiclocking of the converter allows for use of a multireferencing to the sensor capacitor.
Public/Granted literature
- US20120112947A1 WIDE RANGE CHARGE BALANCING CAPACITIVE-TO-DIGITAL CONVERTER Public/Granted day:2012-05-10
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