नॉच फिल्टर कैलकुलेटर — सूत्र

## RC Filter Cutoff

**f_c = 1 / (2 x pi x R x C)**

At the cutoff frequency, output is -3 dB (70.7%) of the input. The time constant tau = RC.

हल किया गया उदाहरण

R = 1k, C = 100 nF.

  1. C = 100 nF = 1e-7 F
  2. f_c = 1 / (2pi x 1000 x 1e-7) = 1591.5 Hz
  3. tau = 1000 x 1e-7 = 0.1 ms