MOSFET Inverter look alike

Thread Starter


Joined Oct 23, 2004
Hey guys,
i'm trying to analyze a circuit which looks alot like a CMOS inverter, however, the NMOS and PMOS transistors are switched ( NMOS drain ocnnected to +2.5v , PMOS source connected to -2.5v)

My question is, if i have an input of 0 volts, how can i figure out what regions Qn and Qp are operating at ? I need the value of the output at the drain for both devices in order to know which regions... but i don't know how to figure it out ( there is a resistor connected in shunt to ground at the output Vout). We can assume that both transistors are matched.

I hope my question is clear.

Thanks guys


Joined Jan 28, 2005
I'm with kubeek on this one. We will need you to post a schematic of the circuit in question to be in a better position to help you.