| 摘要 |
<p>An active filter comprising a first operational amplifier (10) disposed in an inverting integral configuration through a feedback capacitor (14) and a main resistor (15), and a divider (20) connected through a first connecting terminal (22) thereof with a noninverting input (12) of the first operational amplifier (10). In a second embodiment filter 1 comprises a main operational amplifier (100) disposed in an inverting integral configuration through a capacitor (101) and a resistor (102), and a secondary operational amplifier (110) fed back through feedback means (120) and connected with the main operational amplifier (100) through a resistor (130). An inverting input (110a) of the secondary operational amplifier (110) is connected with a noninverting input (100b) of the main operational amplifier (100).</p> |
