Lecture 2: 11-11-2021

Location: D@ta

Time: 13:45 - 15:30

color coded resistors

Goal of this lecture

At the end of this lecture the student should:

  1. Understand the operation of modern short-channel MOS transistors

  2. Know the meaning of the inversion coefficient as defined in the EKV model

  3. Know the way in which the most important small-signal properties of a biased MOS stage depend on the geometry and the inversion coefficient

  4. Be able to design (and verify) a biased (CS) MOS stage with a sufficiently large load drive capability

Poll


Topics

MOS EKV model

IC manyfacturers often provide BSIM model parameters for CMOS devices. BSIM models are optimized for simulation speed and stability. Many parameters of these models have no direct relation to underlying physical mechanisms.

The EKV model shows a strong relation with the physical operation of the device. With the aid of this model it is possible to relate the small-signal parameters of the hybrid-pi model to the device geometry parameters, a small number of technology parameters and the inversion coefficient. This makes it a design-friendly model.

SLiCAP uses the EKV model to relate the small-signal device parameters to the device geometry, the technology and the operating conditions.

Presentation

The presentation EKV model briefly introduces this model.

Downloads

“SLiCAP_python_mosEKVplots.zip

Video

EE4109 2020 2_3 MOS EKV Model

Study

Chapter 4.4.7, 4.5 (except 4.5.3)

Jupyter Notebook MOS characteristics

A virtual machine with a Jupyter notebook for displaying device characteristics of CMOS18 transistors. The characteristics are determined with LTspice and plotted with python.

Presentation

The presentation “Discover CMOS characteristics with jupyter notebook” discusses the installation and applicatipn of the Jupyter Notebook Tool.

Downloads

  1. Install VirtualBox 6 on your computer

  2. Download the Virtual Machine Structured_Electronic_Design_VM_0_3.ova

  3. Install the virtual maching as described in VM_Startup.pdf

  4. Download the manual

Video

EE4109 2020 2_4 Discover CMOS characteristics with jupyter notebook

Study

Chapter 4.4.1 - 4.4.6 (prerequisite knowledge BSc Electrical Engineering)

MOS EKV model

The inversion coefficient is an important measure for the operating conditions of a modern short channel MOS. Many important performance measures show a strong relation with the inversion coefficient.

Presentation

The presentation Application of the EKV model illustrates the use of the inversion coefficient as design parameter.

Video

EE4109 2020 2_5 Application of MOS EKV Model

Study

Chapter 4.4.7, 4.5 (except 4.5.3)

SLiCAP and LTspice files

Download Chapter4.zip

Quiz

Design biased (Class A) NMOS CS stage with sufficiently large drive capability to drive the load of the active antenna.