When do you using a PNP switch for sinking? when the output of an Op amp or Logic Gate is Negative voltage?Normally the PNP using in the high side and NPN using in the low side, why they used PNP in the low side
When do you use a PNP switch for sourcing? when the output of an Op amp or Logic Gate is + positive voltage?
When do you use Transistors switches for sourcing or sinking? I'm not sure when to use them for the right function
Because some circuits use transistor as switches to do sourcing and other circuits use transistors as switches to do sinking
So how do you know when to use it for sourcing or sinking?