Dear members of AllAboutCircuits, for an Electronics lab report, I need to cascade a high pass filter and a low pass filter, both with the same components:
- 2 x 100 nF capacitor
- 2 x 1kΩ resistor.
I need to answer the question: "Why the effect is not purely the sum of the two previous filters?".
Shall I say that we need a buffer amplifier?
Attached there is the bode plot for these two cascaded filters.
The cutoff frequency is 1592 Hz, and, as expected, the gain is the maximum and the phase shift is the minimum at this frequency.
How can I explain this?
Thank you so much
All the best
- 2 x 100 nF capacitor
- 2 x 1kΩ resistor.
I need to answer the question: "Why the effect is not purely the sum of the two previous filters?".
Shall I say that we need a buffer amplifier?
Attached there is the bode plot for these two cascaded filters.
The cutoff frequency is 1592 Hz, and, as expected, the gain is the maximum and the phase shift is the minimum at this frequency.
How can I explain this?
Thank you so much
All the best
Attachments
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