A standard field-effect transistor has four connections: gate, base, source, and drain. In MOSFET logic circuits, two of those connections are wired together, depending on whether it is NPN or PNP, and which side of the circuit it is on.
Applying voltage between gate and base affects the size of the conductive channel between source and drain, like pinching off the flow from one garden hose by wrapping another hose around it.
If you slap two diodes together, you still need to send current through it "sideways" to see a transistor effect.
Applying voltage between gate and base affects the size of the conductive channel between source and drain, like pinching off the flow from one garden hose by wrapping another hose around it.
If you slap two diodes together, you still need to send current through it "sideways" to see a transistor effect.