Electronic Circuits and Projects Forum

Originally Posted by bountyhunter

There are two different and distinct negative feedback loops: one for voltage control and one for current control or current limiting. THe CV (constant voltage) loop senses the output terminals. The CC (constant current) loop senses across the current shunt. The shunt could be in either lead but putting it in the negative line simplifies the design,

Yes, it's a standard method in regulated PSU's, and as you say it's often more convenient (for current limiting) to have the shunt in the negative lead.

Here is another sketch of a voltmeter and a current meter:

Originally Posted by Reloadron

Note the drawing in post #2 of this thread. It shows the current meter in series and the voltmeter in parallel with the load.

Ron

but how to measure the output current of a powersupply if nothing is connected as load?

Originally Posted by Ziddik

but how to measure the output current of a powersupply if nothing is connected as load?

There's nothing to measure, current is what something (the load) consumes, with no load nothing is consumed.

Originally Posted by Nigel Goodwin

There's nothing to measure, current is what something (the load) consumes, with no load nothing is consumed.

Oh.. my! Thank u