3 ms·
> 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 se
by 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.