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Physixs
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Hello, I was reading over poles and filters, but I guess since I don't learn calculus, I don't learn transforms.
With that said, the definition of Poles in my text is a bit iffy... It talks about how the term poles means how many bypass capacitors are in a circuit.
I can't find ANY definitions even remotely close to that online.
However, if I google image filters, I can physically count capacitors to find out how many poles the filter is.
Can I always do that? Can I always look at a circuit, count the capacitors and know how many poles there are in that circuit? Is that legit?
For instance in the picture I provided, since I can see six bypass capacitors, does that mean it is a six-pole filter (I know the answer but wasnt sure if the method was ok)
Also, do you just ignore the low pass filter capacitor that is in the op amp itself (because it is not a bypass capacitor)?
Also, would it be safe to say that as a rule of thumb if you have 2 poles, your roll off will be double (-40dB/decade) and if you have 3 poles it will be triple (-60 dB/decade)?
Thanks so much
With that said, the definition of Poles in my text is a bit iffy... It talks about how the term poles means how many bypass capacitors are in a circuit.
I can't find ANY definitions even remotely close to that online.
However, if I google image filters, I can physically count capacitors to find out how many poles the filter is.
Can I always do that? Can I always look at a circuit, count the capacitors and know how many poles there are in that circuit? Is that legit?
For instance in the picture I provided, since I can see six bypass capacitors, does that mean it is a six-pole filter (I know the answer but wasnt sure if the method was ok)
Also, do you just ignore the low pass filter capacitor that is in the op amp itself (because it is not a bypass capacitor)?
Also, would it be safe to say that as a rule of thumb if you have 2 poles, your roll off will be double (-40dB/decade) and if you have 3 poles it will be triple (-60 dB/decade)?
Thanks so much