For a long time, I didn’t think it was possible to convert certain OTA A-device to Qspice equivalent circuit. It is actually very challenging to convert various LTspice devices into Qspice, not only OTA but also a diode with Ilimit, a switch with Vser/Ilimit/oneway, a G-source with dir/vto, etc…
However, recently, I worked out the equivalent circuit between LTspice and Qspice and was able to convert a number of circuit models into Qspice with a matlab code for this work. This is a case I couldn’t find a solution two years ago for a model containing A-devices. Use notepad++ with compare plugin, you can compare and review what need to be done for such a complex model conversion.
example.LT1677.qsch (6.2 KB)
LT1677-LTspice.txt (2.3 KB)
LT1677-Qspice-251120.txt (6.6 KB)
