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ULF high-pass filter - better

@eekee
5 years ago
https://everycircuit.com/circuit/6660018248876032
It's only 1st-order, but its cut-off frequency of just 161 mHz is extremely low for such ordinary filter components. The frequency can be set much lower by increasing the resistor alone. This one doesn't go quite as low as my last one, but it's much better: it's not dependent on the op-amp's open-loop gain. Circuits should never depend on that.
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