[SOLVED] weatstone bridge with capacitance

[soudabeh]

Hello,
I want to simulate a weatstone bridge with capacitance in orcad. But ,it takes two errors & says that the nodes between two capacitance are floating.The power supply is vsin with frequency of 100MHz.
Please help if you have information about it.
thanks....

 

[LvW]

The simulator requires that each node has a dc path to ground (in some cases this may be a resistor of 1E12 ohms).
That's the reason a capacitor series connection is not accepted - if the capacitors are IDEAL!
In reality each C has losses - therefore this is not a problem in a real circuit. Spice only requires to be realistic in order to be able for a correct calculation.
Therefore put a large resistor that does not disturb the wanted behaviour in parallel to one C.

 

[soudabeh]

Thanks for your reply.My broblem was solved with it.