ethan
Member level 3
Hi there,
It seems no so many people interested in
So, let's put it in a simple way. In the below figure, which is appropriate structure to test step response for slew rate measurement in Cadence spectre?
Note: the opamp is single stage to drive capacitive load.
Which is correct? or All correct? Why for each case?
For (a), I thought there is no DC biasing for Vin and Vip.
Then (b), adding a DC biasing through 10G ohms.
(c), similarly, to add a DC biasing by using switch.
(d) general structure.
However, I got different results through waveforms. I am confused.
with (d) I got correct results for all cases;
with (a), it seems correct, but I am confused with no correct DC biasing in the Vin and Vip, how it works correctly?
with (b) (c), not expected results. don't know why.
the reason needed with (C) is that I need to test OPAMP with different clock phases in close-loop.
Can someone help me to point out these four cases? Thank you so much.
It seems no so many people interested in
So, let's put it in a simple way. In the below figure, which is appropriate structure to test step response for slew rate measurement in Cadence spectre?
Note: the opamp is single stage to drive capacitive load.
Which is correct? or All correct? Why for each case?
For (a), I thought there is no DC biasing for Vin and Vip.
Then (b), adding a DC biasing through 10G ohms.
(c), similarly, to add a DC biasing by using switch.
(d) general structure.
However, I got different results through waveforms. I am confused.
with (d) I got correct results for all cases;
with (a), it seems correct, but I am confused with no correct DC biasing in the Vin and Vip, how it works correctly?
with (b) (c), not expected results. don't know why.
the reason needed with (C) is that I need to test OPAMP with different clock phases in close-loop.
Can someone help me to point out these four cases? Thank you so much.