I am working in 90nm technology in tanner.
I need to calculate width and Length values of each transistor in a circuit.
Pls do help me in doing dis.
Thnaks in advance
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Hi crutschow ,
I am great confusion of calculation those w and L values in a transistor .. could u pls help me....
I am working 90nm technology..
tools is Tanner V14.
Any other details pls let me know.
thanks in advance
1. Do a dc operating point simulation of a NMOS and PMOS with some Vgs and Vds values.
2. Find out Id and Vth of both transistors from the operating point
3. Use the equation Id = 0.5µnCox(W/L)(Vgs - Vth)2 and calculate µnCox
4. Try this out for different values of W/L, Vgs and Vds and take an average.
5. Once you have the values of all the parameters of the process, use the Drain Current equation given in step 3 to find out W/L for the current Id you need and the minimum Vds you want so as to keep the transistor in saturation.
Refer to The notes by Phillip Allen **broken link removed**