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What is baseline wander ? The severity of the baseline wander is dependent on the HPF cut-on frequency and the PSD of the signal around DC.

The output of the high-pass filter will have equal areas (a=b) above and below zero volts.

If the pulse repetition frequency is low compared with the time constant of the input circuit, we'll see some "droop" in the waveform, indicating the discharging of the input capacitor

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