When is pmos in saturation

Figure 2: Basic Voltage Transfer Characteristic. Figure 3 shows a more detailed VTC. Before we begin our analysis it is important to mention three items. First we focus our attention on region I. In this case when we apply an input voltage between 0 and VTN.

The PMOS device on since a low voltage is being applied to it. The NMOS is already negative enough and has no use for more free electrons so it refuses to conduct and turns into a large resistor.

Since the NMOS device is on vacation, there is no current flow through either device. Here we raise the input voltage above VTN. We find that the PMOS device remains in the linear region since it still has adequate forward bias. The maximum allowable input voltage at the low logic state VIL occurs in this region.

We label this point VM and identify it as the gate threshold voltage. For a very short time, both devices see enough forward bias voltage to drive them to saturation. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Asked 3 months ago. Active 3 months ago. Viewed times. Please correct me if I am wrong. Hari Hari 2 2 silver badges 9 9 bronze badges. I hope that you agree that that does make a difference, in one case the PMOS will conduct, in the other case it will not.

JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter lookforjob Start date May 5, Status Not open for further replies. But how about pmos?

I am very confused. Yahia Muhammad Member level 5. Vt shd be negative etc. Similar threads M. Transistor issues-saturation mode Started by mukundh Nov 17, Replies: Analog Circuit Design.