monglebest
Junior Member level 1
I have a low pass 5th order passive elliptic filter from another design. When I try to modify it, I was told that I must keep the input and output terminated properly.
I thought I just need to guarantee its AC response satisfy my requirement (BW and notch in elliptic filter). I don't understand why I must guarantee impedance matching at input and output, but from electronic design handbook, it mentioned that input/output should be matched but it didn't tell me why I should do that.
Can anyone tell me why should I have input/output impedance matching? I think this is not a transmission line as the circuit size is much less than 1/4 of the working frequency wavelength, so why do I bother to have impedance matching? For maximum power transfer?
Can anyone give me some insight?
I thought I just need to guarantee its AC response satisfy my requirement (BW and notch in elliptic filter). I don't understand why I must guarantee impedance matching at input and output, but from electronic design handbook, it mentioned that input/output should be matched but it didn't tell me why I should do that.
Can anyone tell me why should I have input/output impedance matching? I think this is not a transmission line as the circuit size is much less than 1/4 of the working frequency wavelength, so why do I bother to have impedance matching? For maximum power transfer?
Can anyone give me some insight?