Lecture 2: 12-11-2020

Location: www (zoom)

Time: 13:45 - 15:30

color coded resistors

Topics

Discussion results Quiz Biasing Techniques

The results of the quiz will be shared with the attendees.

Presentation

The presentation “Quiz Biasing Techniques” briefly summarizes the related topics.

Downloads

LTspice example circuits of biased CS stages using different techniques: CSstageBiasingTechniquesLTspice.zip

Video

EE4109 2020 2_1 Discussion Results Quiz Biasing Techniques

EE4109 2020 2_2 Discussion BrightSPace Quiz Biasing Techniques

Study

Chapter 3, 9: introduction to biasing (homologation program).

MOS modeling

Poll

There will be a poll “MOS modeling”.

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

  1. “SLiCAP_matlab_mosEKVplots.zip”
  2. “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)

Homework

Jupyter notebook

  1. Create the following plots for the CMOS N channel device (default geometry)
    1. \(I_{DS}(V_{GS})\) with \(V_{DS}\) as parameter
    2. \(I_{DS}(V_{DS})\) with \(V_{GS}\) as parameter
    3. \(F_T(I_{DS})\) with \(V_{DS}\) as parameter
    4. \(g_m(I_{DS})\) with \(V_{DS}\) as parameter
  2. Study the influence of the geometry parameters \(W\) and \(L\) on these curves.