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How to simulate the CTIA readout circuir?

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colinwang

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Whatever kind of analysis I perform in hspice, it always shows that "no dc path to ground from node A". Would anyone can tell me what's the reason and how to simulat the circuit ?
Regards!
 

you must reset your CTIA first.
 

If the current source has dc current, think about how should it be flowing. The current path should be closed loop and KCL should obey at all time.
 

Thanks very much! I know how to do it now!
 

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