Hello everyone,
I'm a bit confused about the behaviour of the transistor Q1 in the NOT circuit showed in one of the textbooks. It says that it behaves as a back-to-back pair of diodes. I always try to understand at a low level so I would like to know what's going on beetwen the PN junctions.
So it behaves as a back-to-back pair of diodes. Why there isn't a current flow beetwen Emitter and Collector ? Is it because:
- The collector is linked to the Base of a NPN transistor Q2. If Q2 was a PNP transistor, there would be a flow.
- Q1 is a different transistor. The P doped area is bigger, so that there can't be any flow beetwen Emitter and Collector.
I hope I have been clear.
Thanks.
I'm a bit confused about the behaviour of the transistor Q1 in the NOT circuit showed in one of the textbooks. It says that it behaves as a back-to-back pair of diodes. I always try to understand at a low level so I would like to know what's going on beetwen the PN junctions.
So it behaves as a back-to-back pair of diodes. Why there isn't a current flow beetwen Emitter and Collector ? Is it because:
- The collector is linked to the Base of a NPN transistor Q2. If Q2 was a PNP transistor, there would be a flow.
- Q1 is a different transistor. The P doped area is bigger, so that there can't be any flow beetwen Emitter and Collector.
I hope I have been clear.
Thanks.