How should the non inverting pin be grounded in a typical opamp feedback regulator circuit? So far i star grounded it to the output cap and threw ground plane on most other nodes. But i wonder if the non inverting pin should be joining them instead.
Heres the circuit im using btw. Rjm audio's x-reg
Heres the circuit im using btw. Rjm audio's x-reg
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The opamp 'measures' the difference between Vout and it's reference. The ground should be connected at the very end where the wires leave the power supply board for the load circuit.
At that same point you should connect the ground of the reference and the ground of the feedback divider.
Any other point will not be 'ground' as all the wires and tracks in the grounding carry current and therefor error signals.
Check out the layout of the superreg at the diyaudio store.
Jan
At that same point you should connect the ground of the reference and the ground of the feedback divider.
Any other point will not be 'ground' as all the wires and tracks in the grounding carry current and therefor error signals.
Check out the layout of the superreg at the diyaudio store.
Jan
