1
\$\begingroup\$

Is there any way to split 2 different grounds in LTSpice? What my aim is to observe the optocoupler input side called "GND-D" and collector output side that called "GND-A"; I want to add the noise on the input side (GND-D) so that I can observe the impact on "GND-A" signals.

\$\endgroup\$
1
  • 1
    \$\begingroup\$ what is the part number that you want to use? \$\endgroup\$
    – sai
    Apr 18, 2023 at 11:48

1 Answer 1

1
\$\begingroup\$

In LTSpice, the ground is simply the reference point for the voltage probe function. Since the program has the ability to measure differential voltage, you can simply not connect directly to the ground symbol for your ground "A". You can't let it completely float; you'll need to tie it to ground "D" through a very high impedance (maybe 100 Megaohm) to make the program happy, but this should be high enough to have a negligible effect on your result.

\$\endgroup\$
1
  • \$\begingroup\$ Thanks, it's work! \$\endgroup\$
    – Andy Chen
    Apr 19, 2023 at 12:52

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.