Title:
正弦波電圧信号を用いて容量を測定する容量測定回路、容量測定センサーシステム及び容量測定方法
Document Type and Number:
Japanese Patent JP5722443
Kind Code:
B2
Abstract:
A capacity measuring circuit includes a measuring voltage source configured to feed a sinusoidal voltage signal to a first terminal of a capacity to be measured so as to cause a temporal change in a charge stored on the capacity to be measured. The capacity measuring circuit additionally includes a delta-sigma modulator. The delta-sigma modulator is configured to receive a charge from a second terminal of the capacity to be measured and to provide a digital output signal which is dependent on a quantity of the charge received from the capacity to be measured. The capacity measuring circuit may be employed in a sensor system.
Inventors:
Medel, Stephan
Hower, Johann
Sauer, Joseph
Hower, Johann
Sauer, Joseph
Application Number:
JP2013523576A
Publication Date:
May 20, 2015
Filing Date:
August 05, 2011
Export Citation:
Assignee:
Fraunhofer-Gesellschaft Tool Felderung del Angewanten Forsung Eingetler Genel Fehlein
International Classes:
G01R27/26; H03M3/02
Domestic Patent References:
| JP2008542696A | ||||
| JP2011107086A | ||||
| JP11132787A | ||||
| JP2009524997A |
Foreign References:
| WO2009042692A2 | ||||
| WO2010036545A2 |
Attorney, Agent or Firm:
Patent business corporation Profic patent office