Delete comment from: Ken Shirriff's blog
Toivo Henningsson said...
I imagine that a current source in the form of a current mirror could be smaller than a load resistor. But I don't know if that applies to the current source design used here.
Functionally, I would imagine that a current sink makes the circuit behave as intended over a wider range of Vin1, Vin2.
Apr 30, 2021, 2:27:46 AM

