Spice simulation: probing between two nodes

[kicadmit]

How do I probe across two nodes of a circuit, i.e., measuring voltage between two nodes.

For example, I want to see AC waveform between two nodes.

Thanks!

[venkatas]

I do not know if that is possible…Even as I keep trying and waiting for others to suggest something useful, how about adding an opamp with -ve feedback to give just the difference at the output?

[holger]

Add differential signals Ngspice

Hi everybody. This is my first thread so please be patient. Right now I’m designing a single-ended to full-differential OPA filter. [imagen] But I don’t know how to measure or add the differential output from the filter in the spice simulator. I want to see the transfer function from the single-ended input to the differential output. You think you can help me? Thanks

[kicadmit]

Will it work for Transient analysis?

Following simple circuit does not work:

I get the “Singular Matrix” error when simulating.

[holger]

Please post the “exact” error message.

What about adding two 1GOhm resistors inside of the subcircuit between in+ in- and GND?

[venkatas]

Please try using a negative feedback

Regards
Rahul

[kicadmit]

Yep, adding the two 1Gohm resistors as you suggested seems to do the trick! Thanks!