| 摘要 |
<p>A multi-purpose filter includes a first integration circuit including a first differential amplifier having first input terminals and a first output, a first capacitor connected with the first output, and a first output circuit; a second integration circuit connected in series with the first integration circuit and including a second differential amplifier having second input terminals and a second output, a second capacitor connected with the second output, and a second output circuit; a feedback circuit connected between the first and second output circuits and the first input terminals; and a plurality of capacitor terminals connected with both ends of the first and second capacitors such that different filter characteristics are obtained by selecting different ones of the first input terminals, the second input terminals and the plurality of capacitor terminals as an input and an output of the filter.</p> |
