Gove me day or so and I should be able to bring one into the spice library for you. If you don't need any specific model and just want a behavioural multiplier function you can use a B source. For more, see (3) in (2) in: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)

Hi, Thank you for your answer, I don't know what you mean by B source... I already searched on EasyEDA and internet, but I did'nt find... An AD633 would be perfect, it's exactly what I use at the school. What's more is that, despite of advises I might find on easyEDA forum, I can't succeed to make mathematical operations with probes maybe it's due to the new version ? Actually, I would like to multiply a signal coming from a phase shifter and another which come from a voltage-to-current converter, after that I want to filter the signal before visualize tdifferent voltage probes in the circuit. Thanks, Bye.

Please see the latest version of the Simulation Tutorial, (3), in (2) in: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)

I have uploaded models and created spice symbols for the AD633 (typical values) and AD633J (worst case) models. Search for AD633 and look for my name as owner. Good luck finding them because the Shift+F Search libraries tool seems to still be very confused about spice symbols.

Thanks a lot, it's very cool !