Electronics Handbook/Circuits/Low-pass Filter
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Low-pass Filter[edit | edit source]
A low-pass filter has a stable voltage at low frequencies and increasing voltage at high frequencies.
Low-pass Filter , LR Configuration[edit | edit source]
Picture
Vo/Vi[edit | edit source]
Frequency Response[edit | edit source]
- ω = 0 .
- ω = .
- ω = 00 .
LR has a stable voltage at low frequencies and increasing voltage at high frequencies.
Low-pass Filter , RC Configuration[edit | edit source]
Vo/Vi[edit | edit source]
- với
Frequency Response[edit | edit source]
RC has a stable voltage at low frequencies and increasing voltage at high frequencies.
Summary[edit | edit source]
- 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 =