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Electronics Handbook/Circuits/Low-pass Filter
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Low-pass Filter
A low-pass filter has a stable voltage at low frequencies and increasing voltage at high frequencies.
Low-pass Filter , LR Configuration
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Frequency Response
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LR has a stable voltage at low frequencies and increasing voltage at high frequencies.
Low-pass Filter , RC Configuration
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Frequency Response
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RC has a stable voltage at low frequencies and increasing voltage at high frequencies.
Summary
Low-pass filters have a stable voltage at low frequencies and increasing voltage at high frequencies.
Low-pass filters can be constructed from RC or LR.
Low-pass filters have a general formula:
. T = RC =