| 摘要 |
A method for determining a vector component of an oscillation such as an oscillatory signal comprises applying the measured analog oscillatory signal to the calibration voltage input of a multiplying digital-to-analog (D/A) converter, and simultaneously applying a digital reference signal to the digital input of the digital-to-analog converter. The reference signal includes sine or cosine values of an oscillation suitable for the vector component determination and having a frequency corresponding to the frequency of the oscillatory signal to be determined. The analog output of the D/A converter is then further processed to ascertain the desired vector component. The circuit arrangement for practicing this method comprises a multiplying digital-to-analog converter and a binary counter which sequentially addresses a digital memory used to provide the digital reference signals. The binary counter is controlled by a reference signal generator.
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