Electronics Handbook/Devices/Filter/Low Pass Filter

RC

Configuration

Characteristics

{\frac {V_{o}}{V_{i}}}={\frac {\frac {1}{j\omega C}}{R+{\frac {1}{j\omega C}}}}={\frac {1}{1+j\omega T}}

T=RC

\omega _{o}={\frac {1}{T}}={\frac {1}{RC}}

LR

Configuration

Characteristics

{\frac {V_{o}}{V_{i}}}={\frac {R}{R+j\omega L}}={\frac {1}{1+j\omega T}}

T=RC

\omega _{o}={\frac {j\omega L}{R+j\omega L}}={\frac {1}{1+j\omega T}}

Summary

The two configurations above can be used for Low Pass Filter which has stable voltage which does not change with frequency over low range of frequencies

This article is issued from Wikibooks. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.