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