Register to reply

Value of Vout in PMOS Inverter?

by jean28
Tags: inverter, pmos, vout
Share this thread:
jean28
#1
Feb6-13, 08:54 PM
P: 86
Hey guys. I am simply trying to derive the equation for Vout in a PMOS inverter (attached). I know that in an NMOS inverter (which has the resistor in top of the transistor instead of the bottom) the equation for Vout is:

Vdd - id*rd.

But how does the resistor being in the bottom change this behavior? Is it now Vcc - ground? (which would equal Vcc).

Thanks.
Attached Thumbnails
PMOS_NOT.png  
Phys.Org News Partner Engineering news on Phys.org
Tiny UAVs and hummingbirds are put to test
Britain to trial driverless cars from 2015
NIST corrosion lab tests suggest need for underground gas tank retrofits
jean28
#2
Feb6-13, 08:55 PM
P: 86
It could also be Vout = id * Rd.
NascentOxygen
#3
Feb23-13, 05:42 AM
HW Helper
Thanks
P: 5,165
Quote Quote by jean28 View Post
It could also be Vout = id * Rd.
If by Rd you mean that external resistor, then that looks right for output logic HIGH.


Register to reply

Related Discussions
AC coupling using NMOS and PMOS Engineering, Comp Sci, & Technology Homework 5
Nmos Pmos circuits... Engineering, Comp Sci, & Technology Homework 1
NMOS and PMOS Introductory Physics Homework 1
PMOS Working Concept Electrical Engineering 3
Modify computer inverter to accept power from house inverter Electrical Engineering 0