| 摘要 |
PURPOSE:To vary the Q from ''0'' by connecting sequentially the 2nd inverse amplifier and the 1st and 2nd integration circuits in cascade, applying an input signal to an input terminal of the 1st inverse amplifier and obtaining a band pass output from the output terminal of the 1st integration circuit. CONSTITUTION:The 2nd inverse amplifier 26, the 1st integration circuit 11 and the 2nd integration circuit 16 are connected sequentially in cascade. Then an input signal Vi is inputted to an input terminal 1 of the 1st inverse amplifier 23. Thus, a low pass output VL is obtained from an output terminal 18 of the 2nd integration circuit 16, a band pass output VB is obtained from an output terminal 19 of the 1st integration circuit 11 and a high pass output VH is obtained from an output terminal 20 of the 2nd inverse amplifier 26.
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