q0w1e2r3
Junior Member level 1
who can tell me why the simulation result is that as follows? It's closed loop opamp,with the ratio of cap being 2:1.I used two common mode feedback,cuz the opamp is two-stage.I use Ahjua compensation.The schemetic is as follows.
The simulation is run several periods to make CM voltage stable .But the result wave is lousy,it has a lot of spurs bones,and the DM voltage is higher than the stable one that i want,is it reasonable or does it constrain dynamic range?in addition,how i can do to get a better performance.Who can give me some ideas?
I appreciate it ,Thanks!
The simulation is run several periods to make CM voltage stable .But the result wave is lousy,it has a lot of spurs bones,and the DM voltage is higher than the stable one that i want,is it reasonable or does it constrain dynamic range?in addition,how i can do to get a better performance.Who can give me some ideas?
I appreciate it ,Thanks!