Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Yes, basically when you use 1st order equation, the ideal one is gm/Id = 2/Veff. However, if you use realistic model to simulate, it is far from ideal. Basically you can use SPICE to sweep the Vgs and calculate gmoverId. Then plot gmoverId vs different Vgs values and you can see that it's far from ideal cases.
For SPICE there is a parameter called gmoverId that you can use immediately. If you use SPECTRE, it will be more tricky as you need to set up .scs files in order to capture different .op points.
About this problem, I have a question:
For a given Id, you can got a lot of possible operating points with different Vgs and Vds.
For different operating points, the gm is not constant.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
