modified 2 years ago

Bandstop filter

01:53:22

Passes low frequency , filters out mid range and passes high frequency , gradually increase the frequency to 500k hz to see the filtering , heavy filtering begins at about 20k hz to 50k hz, and then starts passing higher frequencies after 60k hz

published 6 years ago

kiani

6 years ago

Chek this. Redrew your cct. http://everycircuit.com/circuit/6473605417009152

kiani

6 years ago

It is just low pass. And not bandpass, chech cct. For errors.

westelaudio

6 years ago

The filter on top is a low pass of q = .5 and f6 of 23.4 kHz, and inly this filter has an effect, that on the botton has no effect

westelaudio

6 years ago

1÷(2π×6800×(1÷1000000000))

westelaudio

6 years ago

Bottom one:

westelaudio

6 years ago

1÷(2π×2230×(0.5÷1000000000))

westelaudio

6 years ago

Thats an f3 of around 143kHz

westelaudio

6 years ago

So why doesn't it work? I mean, a band stop (notch) is basically a high pass and low pass in parallel

westelaudio

6 years ago

It works now that I changed the two 1n to one 500p, maybe EC has a problem with series capacitance?

westelaudio

6 years ago

http://everycircuit.com/circuit/5738762886447104

hurz

6 years ago

@westelaudio, yes and there are more thing which do not work within bodeplots.

BrianTronics

6 years ago

I don’t have any issues with the circuit when I run it ? , it filters just fine

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