Electronics Handbook/Devices/Filter/Low-pass

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

Network LR Low-pass Filter

 * $$\frac{V_o}{V_i} = \frac{Z_R}{Z_R + Z_L} = \frac{1}{1 + j\omega T}$$
 * $$T = \frac{L}{R}$$
 * $$\omega_o = \frac{1}{T}$$

Net Work RC Low-pass Filter

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