Amateur Extra › E7 Practical Circuits › E7C01
E7C01
How are the capacitors and inductors of a low-pass filter Pi-network arranged between the network's input and output?
Pick an answer to check it.
Answer: D. A capacitor is connected between the input and ground, another capacitor is connected between the output and ground, and an inductor is connected between the input and output
A low-pass Pi-network has capacitors from input and output to ground and an inductor in series between them. Shunt capacitors short high frequencies to ground while the series inductor blocks them.
Tip: Pi low-pass: C to ground, L across the top.