| 摘要 |
<p>The circuit is used to eliminating alternating voltage superimpositions and other, non-periodical interference from direct voltages in measuring, control and communication systems. The input signal, consisting of direct and interference signals, is inverted by a first operational amplifier (V1). Further operational amplifiers (V2-V4) are used for summating the input signal and inverted interference signal. The inverted signal is typically supplied to the summation amplifier (V4) via a separating amplifier (V2) which separates the direct voltage from the interference voltage. The remaining amplifier (V3) provides inversion and amplitude equalisation and supplies the summation amplifier (V4).</p> |
