rmanalo
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Hello everyone,
I'd like your opinion on the parameter extraction of the threshold voltage used for hand calculation, please see the snipped image from the book and simulated graph (L=5um for a 0.18um technology) below.
![k-parameter.JPG k-parameter.JPG](https://www.edaboard.com/data/attachments/82/82914-2894091d2614a081af09d9852e4fabb8.jpg)
![plot.JPG plot.JPG](https://www.edaboard.com/data/attachments/82/82913-211290ebffa4f39a74e1c9a4e0ae3c34.jpg)
The threshold voltage is extrapolated following the procedure in appendix C in the book. From the data points in the simulated graph, I obtained a Vth of 0.33V. However, when I performed operating point analysis the Vth is showed to be 0.45V. I'd like your opinion on this and it's implication for hand calculation for first-cut design.
I'd like your opinion on the parameter extraction of the threshold voltage used for hand calculation, please see the snipped image from the book and simulated graph (L=5um for a 0.18um technology) below.
![k-parameter.JPG k-parameter.JPG](https://www.edaboard.com/data/attachments/82/82914-2894091d2614a081af09d9852e4fabb8.jpg)
![plot.JPG plot.JPG](https://www.edaboard.com/data/attachments/82/82913-211290ebffa4f39a74e1c9a4e0ae3c34.jpg)
The threshold voltage is extrapolated following the procedure in appendix C in the book. From the data points in the simulated graph, I obtained a Vth of 0.33V. However, when I performed operating point analysis the Vth is showed to be 0.45V. I'd like your opinion on this and it's implication for hand calculation for first-cut design.