This is the datasheet of AD8232 https://www.analog.com/media/en/technical-documentation/data-sheets/AD8232.pdf
On page 22 in the section "Additional High-Pass Filtering Options" is this diagram:
It is said that the cut off frequency is located at
I tried to find out where this formula came from.
I tried to make the equivalent circuit of this filter in hopes I could find the transfer function of this circuit.
What I get is not in accordance with the high pass filter circuit and looks like a low pass filter:
I would be happy if someone could explain to me how to get the cut off frequency and equivalent circuit of this high-pass filter.
On page 22 in the section "Additional High-Pass Filtering Options" is this diagram:
It is said that the cut off frequency is located at
I tried to find out where this formula came from.
I tried to make the equivalent circuit of this filter in hopes I could find the transfer function of this circuit.
What I get is not in accordance with the high pass filter circuit and looks like a low pass filter:
I would be happy if someone could explain to me how to get the cut off frequency and equivalent circuit of this high-pass filter.