Calculadora de Frequência de Corte do Filtro RL
Calcule a frequência de corte de filtros passa-baixa e passa-alta RL.
Ω
mH
Cutoff Frequency
15,915.5 Hz
Time Constant (L/R)0.0100 ms
Cutoff Frequency vs Resistance
Formula
## RL Filter Cutoff **f_c = R / (2 x pi x L)** Time constant tau = L/R. An RL low-pass passes DC and attenuates high frequencies.
Exemplo Resolvido
R = 1k, L = 10 mH.
- 01L = 0.01 H
- 02f_c = 1000 / (2pi x 0.01) = 15,915.5 Hz
- 03tau = 0.01 / 1000 = 0.01 ms
Perguntas Frequentes
RL vs RC filter?
Same rolloff rate (-20 dB/decade), but RL uses an inductor where RC uses a capacitor.
Why use RL over RC?
RL filters handle DC current better. Useful in power supply filtering.
Inductor disadvantages?
Inductors are larger, heavier, and more expensive than capacitors for most filter applications.
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