Feb 20, 2007 #1 Y yonzzan Junior Member level 3 Joined Dec 12, 2006 Messages 26 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,522 vds vgs Vds, Vgs, Vdsat of PMOS are negative. If I convert it into positive, do I have to subtract them from 1.8V( PMOS2V) or can I just use the absolute number of them?
vds vgs Vds, Vgs, Vdsat of PMOS are negative. If I convert it into positive, do I have to subtract them from 1.8V( PMOS2V) or can I just use the absolute number of them?
Feb 20, 2007 #2 C chemaphy Junior Member level 2 Joined Oct 13, 2005 Messages 22 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,281 Activity points 1,440 vdsat negative Hello, You will not have to subtract all of them by 1.8V, but you will have to be careful with the conditions for different operation mode of the PMOS. For triode region: Vds > Vgs - |Vt| where Vds and Vgs are +ve For saturation region: Vds < Vgs - |Vt| where Vds and Vgs are +ve Regards, chemaphy
vdsat negative Hello, You will not have to subtract all of them by 1.8V, but you will have to be careful with the conditions for different operation mode of the PMOS. For triode region: Vds > Vgs - |Vt| where Vds and Vgs are +ve For saturation region: Vds < Vgs - |Vt| where Vds and Vgs are +ve Regards, chemaphy
Feb 21, 2007 #3 S shockie Advanced Member level 4 Joined Jul 10, 2002 Messages 100 Helped 6 Reputation 12 Reaction score 4 Trophy points 1,298 Activity points 500 vds,vgs, little bit confued here. For triode region. |Vds|<|Vgs|-|Vt| For saturation region. |Vds|>|Vgs|-|Vt|.
vds,vgs, little bit confued here. For triode region. |Vds|<|Vgs|-|Vt| For saturation region. |Vds|>|Vgs|-|Vt|.
Feb 21, 2007 #4 A analog_guru Member level 1 Joined Dec 9, 2006 Messages 34 Helped 19 Reputation 38 Reaction score 9 Trophy points 1,288 Activity points 1,541 pmos vt versus vds You are right shockie in all both of your assumptions. i.e., subtract the abs. value of those from Vdd.
pmos vt versus vds You are right shockie in all both of your assumptions. i.e., subtract the abs. value of those from Vdd.