Design a low-pass or high-pass RC filter and explore its frequency response.
The response assumes an unloaded, first-order RC filter. Input and output voltages are peak amplitudes. At the cutoff, amplitude is about 70.7% of the input, not half. The simulator also shows the transient response.
How to use
- Choose low-pass or high-pass and select the unknown value.
- Enter R in ohms and C in microfarads, or the desired cutoff frequency.
- Compare gain and phase, then open the circuit and probe G1 and V1.
Circuit model
fc = 1/(2πRC); τ = RC; |HLP| = 1/√(1 + (f/fc)²); |HHP| = (f/fc)/√(1 + (f/fc)²).