Electronics Handbook/Devices/Filter/High-pass

A high-pass filter is an electronic device that has stable voltage that does not change over a certain range of high frequencies.

Configurations

High-pass RL Filter

$\frac{V_o}{V_i}=\frac{Z_L}{Z_R+Z_L}=\frac{j\omega T}{1+j\omega T}$

$T=\frac{L}{R}$

${\omega }_o=\frac{1}{T}$

High-pass CR Filter

$\frac{V_o}{V_i}=\frac{Z_R}{Z_R+Z_C}=\frac{j\omega T}{1+j\omega T}$

T = RC

${\omega }_o=\frac{1}{T}$