Hi folks,
Taking my first look at op amps, many questions spring to mind.
But let's start with the basics.
Below is an GIF for your inspection.
I'm trying to get my head around the signal flow in this simplest of all op amp circuits.
Ok, so in the real world, the op amp has power leads coming in and out of it, which are not shown on the diagram.
In this circuit, because the difference in voltage across the signal pins is great, the op amp is setting it's output voltage as high as possible, because that's what it's designed to do.
What i don't understand is: the circuit actually shows current flowing from the output down to ground.
But how do I / we know where that ground is connected to with regard to the invisible power source that is supplying the op amps power?
That ground must be connected somewhere to the invisible power source, otherwise no current would flow, right?
But maybe it's connected to the op amp power source's positive terminal, in which case no current would flow??!!