Low Pass filter.pdf

Low pass filter.

1. Basics Circuits by Thomas L floyd PG 835

3. Output is taken across the capacitor.

4. We know
When input is 0Hz(DC)
is gradually decreases as frequency increases. All the voltage goes through
capacitor.
Critical frequency
Xc=
1
2πfcC
Why capacitive reactance is less at high frequency? This concept is essential in-
order for understanding Low pass and high pass filter.
Youtube video
Xc=∞
Vout
fc=R