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.

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
 * $$\omega_o = \frac{1}{T}$$