| 摘要 |
<p>A circuit arrangement for determining a capacitance of a number n of capacitive sensor elements (SE1˜SEn) comprises at least one collecting capacitor (CS1˜CSm), a reference voltage source (RQ), an evaluation device (AE) connected to the at least one collecting capacitor to evaluate a voltage present at the at least one collecting capacitor , a control unit (MC) for generating at least one control signal (SS1˜SSk), and at least one integrated circuit (IC1˜ICm) connected to the reference voltage source, the sensor elements, and the at least one collecting capacitor. The at least one integrated circuit comprises a number k of changeover switches (WS1˜WSk) responsive to the at least one control signal to connect the respectively associated sensor element to the reference voltage source in a first switching position, and to the at least one collecting capacitor in a second switching position.</p> |
