The request
“Draw an RLC notch filter with a 1 V AC input, 1 kΩ series resistor, a 10 mH and 100 nF series shunt branch, a 50 Ω loss resistor, and a 10 kΩ output load.”
Then tryChange the tank capacitor to 47 nF.Add a test point at the output.
What is in this drawing
Read the decisions behind it.
01Notch branch
Put a series L-C path from signal to ground.
02Isolation
Use a series resistor ahead of the output.
03Load
Include the next-stage input resistance.
Use to illustrate a tuned branch that attenuates one narrow frequency region.
More like this
Other examples in this family.
FAQ
Common questions
What does a notch filter remove?
It attenuates a selected narrow frequency band while passing frequencies on either side.
Why is the L-C branch in series?
A series L-C branch has low impedance at resonance and can shunt that frequency to ground.
What limits notch depth?
Component losses, source resistance, and load impedance keep a practical notch from being ideal.