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How to determine the stability of complex band pass filter

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hunduanic

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hi,everyone:
I'm doing a Complex BPF,but I don't know whether it is stable?How to determine its stability?
I have done the transient simulation with a input of step signal,there is a ringing at the output, but I think the reason is large capacitances' charging in the circuit.
Meanwhile, I have done the stb simulation with the cmdmprobe,,
the schematic diagram:
原理图.png
the result(from left to right):
The first cmdmprobe result:
me cmd1.jpg
The second cmdmprobe result:
me cmd2.jpg
The third cmdmprobe result:
me cmd3.jpg
The fourth cmdmprobe result:
me cmd4.jpg
 
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