4 ms·
Thanks for letting me know! I've updated the diagram with the right version. Yes, the transistor is a current sink. Since the gate is wired to Vdd, the transis
by kens 6y ago
Thanks for letting me know! I've updated the diagram with the right version.
Yes, the transistor is a current sink. Since the gate is wired to Vdd, the transistor is stuck on so it provides a fixed current limited by its size. Transistors are much smaller than resistors on an IC so they used transistors instead of resistors.
- a1369209993 6y ago> Yes, the transistor is a current sink. Since the gate is wired to Vdd, the transistor is stuck on so it provides a fixed current limited by its size. That seems wrong? Q3 appears to be effectively acting as a diode with cathode fixed at -9V and a 5V threshold, such that Q2's gate (Q3's anode) can never be above -4V, but will be pulled lower by the capacitor if `out` drops. (At which point Q3 doesn't provide any current because its anode is down at -18V.)
- kens 6y agoI was answering the question about the load transistor in the earlier inverter diagram, not Q3. I mention Q3's diode action in footnote 5.
- a1369209993 6y agoAh. That makes sense, then.