modified 10 years ago

CurrentMonitor

00:27:41

Is this issue with EC ever going to be fixed ?
- that closed regulation-loops involving opamps cannot be solved :-(

published 11 years ago

faceblast

11 years ago

yeah put a cap to ground on the noninverted input

HamSjelw

11 years ago

Thank your for your suggestion faceblast. Unfortunately it doesn't seem to remedy the issue :-/ I dont quite see the point either. This issue pervades all such circuits, where an op-amp is controlling a transistor (at the regulating component) in a feedback-loop. This is very common in linear PSU's etc. When ever the loop i closed, it cannot be solved :-(

HamSjelw

10 years ago

Recently I was advised to incorporate a switch in such circuits, so the simulation can be started with open loop. That worked fine elsewhere. Here the simulator just crashes with an error-message, when the switch i closed :-/

HamSjelw

10 years ago

The crash-condition is apparently solved by lowering the op-amp gain to 1K (as a work-around)..

HamSjelw

10 years ago

But ajusting other values (resistors etc.) will still induce crashes :-/

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.