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Why does the passive highpass filter give such results in spice analysis?

Electronx

I am designing a passive high pass filter, here are the values: 2 MΩ and 1 uF cut-off frequency is 0.07 Hz +-20 V and when I apply a 1 kHz sine signal, I get such a result. What is the reason for this? The voltage level looks like this. I'm using Pspice. When I keep the cutoff frequency constant and normalize the resistance value to smaller values, the filter response seems to return to normal.

  • retiredEE
    +1

    Somehow your sinewave frequency was set to 1Hz.  The Probe plot indicates that and is a correct waveform for R3 set to 2 milliohms.  Change R3 to 2MEG, the value that you want.  You can look at the output file to see what the sine frequency is set to.

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