nelly1
Junior Member level 3
Please help!!!! nmos pmos stacked driver
Hallo everyone!
I have a problem which can't be solved about the driver.The schematic is showed as follow:
When I change the W/L of Mnp5,the Ron change,but the Vd_Mnp5 doesn't change with W/L(I used paramatic analysis),which leads to the problem that when Mn5 on, it can't provide the Vg_Mp3 to 1.2V(almost 850mV). As a result, the Mp3 is actually on cuz Vs>Vg (should be off).Mp5 and Mn3 have the same problem.
I choose Rnp1=85k, Rnp2=100k. And i try to reduce them to 8.5K and 10K to increase the current,but didn't work.
The result about paramatic analysis is:
net50:Vd_Mn5=Vg_Mp3
blue one: Vs_Mp3
Seem that Vs should be Vg-Vth(failed Vth)!
THX a lot !!!
Hallo everyone!
I have a problem which can't be solved about the driver.The schematic is showed as follow:
When I change the W/L of Mnp5,the Ron change,but the Vd_Mnp5 doesn't change with W/L(I used paramatic analysis),which leads to the problem that when Mn5 on, it can't provide the Vg_Mp3 to 1.2V(almost 850mV). As a result, the Mp3 is actually on cuz Vs>Vg (should be off).Mp5 and Mn3 have the same problem.
I choose Rnp1=85k, Rnp2=100k. And i try to reduce them to 8.5K and 10K to increase the current,but didn't work.
The result about paramatic analysis is:
net50:Vd_Mn5=Vg_Mp3
blue one: Vs_Mp3
Seem that Vs should be Vg-Vth(failed Vth)!
THX a lot !!!
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