Analog OpAmp Multiply and Divide

172

01:54:01

WARNING! Set all voltages to ZERO when starting. 2 left voltage multiplied together then divided by top right voltage (must not = 0).  Answer in bottom right. The simulator has a problem with feedback systems and steady state analysis. If there was an option to start supplies = 0V then rise quickly it would work. This circuit was borrowed from a member on EEvBlog.com constant current load. 

published 9 years ago

hurz

9 years ago

Nice circuit. As workaround you can use relais. That doesn't make it looking better but it makes startup easy. Keep it up! http://everycircuit.com/circuit/5231677961404416

EE4Life

9 years ago

Nice suggestion! I hadn't considered that it would evaluate the circuit first before switching the relays. I just wish that there was a setting to say (start sim with zeroed voltage sources).

hurz

9 years ago

Yes, a single pulse source like in other sim tools provided would help here for this problem. Also could be used as reset/initialization signal at srartup for many other circuits. Anyway, i got news from Igor and we have a good chance the next coming updates will include a better simengine which might solve this issue. Lets see. BTW, you can send your wishes from the app directly by use of the right most button on top of component list. Keep it up!

lphiew

2 years ago

Nice circuit.

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