Design a high-pass filter and calculate its response at any frequency.
A high-pass filter blocks DC and low frequencies while passing high ones. Because a capacitor blocks DC completely, high-pass sections are also used as coupling capacitors between amplifier stages. The same RC pair forms a low-pass or high-pass filter depending only on where the output is taken, which is worth remembering when reading schematics.
High Pass Filter
Gain = (f/f_c) ÷ √(1 + (f/f_c)²) per order
Gain = (f/f_c) ÷ √(1 + (f/f_c)²) per order A high-pass filter blocks DC and low frequencies while passing high ones. Because a capacitor blocks DC completely, high-pass sections are also used as coupling capacitors between amplifier stages.
The same RC pair forms a low-pass or high-pass filter depending only on where the output is taken, which is worth remembering when reading schematics.
This calculator takes 4 inputs: Resistance, Capacitance, Signal frequency, Filter order. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.