| 摘要 |
A sensor (100, 200) for measuring a variable generates a sensor signal (S), oscillates at a drive frequency (fx), and includes: a rate demodulator (135), which demodulates the sensor signal (S) by multiplying it by a first demodulation signal, in order to generate a rate signal (R1), which contains information about the measured variable to be measured; a quadrature demodulator (140), which demodulates the sensor signal (S) by multiplying it by a second demodulation signal shifted by 90° with respect to the first demodulation signal, to generate a quadrature signal (Q1); and an analysis circuit (170), which determines whether the quadrature signal (Q1) or a signal (Q2) derived therefrom is subject to a periodic oscillation and, if a periodic oscillation is present, outputs a status signal (Xst) having a value which indicates that the instantaneous rate signal (R1) is influenced by an external interference acting on the sensor (100, 200). |
