I notice for some current mirror implementation includes a series resistor that is connected to the gate of the diode-connected transistor of the current mirror.
May I know the the purpose of the series resistor?
hi, i've seen this circuit in a book talking about current-mode design longtime ago
if i'm right, the R here is to increase the bandwidth, the pole will change and it also add a zero.
you can calculate the small signal transfer func from the input current to the voltage of the M2 gate