Electronics Fundamentals/Electronic Filter/High Pass Filter

CR High Pass Filter

Configuration

Characteristics

$\frac{V_o}{V_i}=\frac{R}{R+\frac{1}{j\omega C}}=\frac{j\omega T}{1+j\omega T}$

$T=RC$

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

RL High Pass Filter

Characteristics

$\frac{V_o}{V_i}=\frac{R}{R+\frac{1}{j\omega C}}=\frac{j\omega T}{1+j\omega T}$

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

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

Summary

High Pass Filter has stable voltage which does not change with frequency over a range of high frequency . High Pass Filter can be constructed from CR or RL network