| 摘要 |
<p>This invention relates to adjusting a filter (110; 112) of a time-continuous Sigma-Delta converter (100) arranged to convert an analog input signal (S<SUB>in</SUB>) to a digital output signal (S<SUB>out</SUB>). A control signal (S<SUB>det</SUB>) indicative of a gain of the filter is provided, and the gain of the filter is adjusted in dependence of the control signal. The control signal (S<SUB>det</SUB>) is provided from the digital output signal of the Sigma-Delta converter. In this way the performance of the Sigma-Delta converter can be improved in a simple way that requires no or few additional analog components, and the Sigma-Delta converter itself is used to adjust its performance. Using a signal from the digital domain of the Sigma-Delta converter is advantageous in that it is typically easier, faster and more precise to process signals in the digital domain.</p> |
