Jenifer_gao
Member level 1
class ab site:edaboard.com
Hi All:
I am listening to the Berkeley lecture of EECS140 about the stability. There is a circuit about Class AB Input Stage Cross Coupled Differential Pair, which is attached. I don't quite understand how this circuit works. Because on the schematic, node A and node C has the same voltage Vi+, and node B and node D has the same voltage of Vi-. But I think from node A to node C, it has a voltage drop about 2Vdsat+2Vt, and the same thing from node B to D. And I don't quite understand the function of the level shift here.
Can anybody explain it? Thanks.
J
Hi All:
I am listening to the Berkeley lecture of EECS140 about the stability. There is a circuit about Class AB Input Stage Cross Coupled Differential Pair, which is attached. I don't quite understand how this circuit works. Because on the schematic, node A and node C has the same voltage Vi+, and node B and node D has the same voltage of Vi-. But I think from node A to node C, it has a voltage drop about 2Vdsat+2Vt, and the same thing from node B to D. And I don't quite understand the function of the level shift here.
Can anybody explain it? Thanks.
J