Junus2012
Advanced Member level 5
Dear friends,
I understand for the wide swing mirror we need cascode diode biasing voltage like the one seen below, no doubt about it
However, for the following fully differential circuit shown below, the common mode feedback circuit as you see is using cascoding diode to bias single transistor (M3&M31 gate) of the main amplifier,
this scheme I don't understand why ? is it that necessary ?
thank you
I understand for the wide swing mirror we need cascode diode biasing voltage like the one seen below, no doubt about it
However, for the following fully differential circuit shown below, the common mode feedback circuit as you see is using cascoding diode to bias single transistor (M3&M31 gate) of the main amplifier,
this scheme I don't understand why ? is it that necessary ?
thank you