Finding the Cutoff Frequency for RL High-Pass/Low-Pass Filters

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The formula for finding the cutoff frequency of an RL high-pass or low-pass filter is Fc = R / (2πL). This differs from the RC filter formula, which is 1 / (2ΩRC). A user noted an issue with the pi symbol displaying as an omega, but provided a solution for proper formatting. The discussion highlights the importance of understanding the distinct formulas for different types of filters. Accurate representation of mathematical symbols is also emphasized for clarity in communication.
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Does anyone know the formula to find the cutoff frequency for an RL High-Pass/ Low-Pass Filter?

I know with RC filters it's 1/ (2ΩRC) ,but this does not work for RL filters.
 
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I figured it out, but if anyone is ever looking for it it's:

Fc (Cutoff frequency) = R/ ( 2π L)
 
Last edited:
Petrucciowns said:
I figured it out, but if anyone is ever looking for it it's:

Fc (Cutoff frequency) = R/ ( 2ΩL)

Your PI symbol is coming out as an Omega...
 
FYI, if you copy-and-paste the text on the right below, you'll get a nice looking pi symbol:

π . ← . [noparse]π[/noparse]
 
That's wierd, but it's all fixed. Thanks for pointing it out.
 

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