Lecture 3: 17-11-2020

Location: www (zoom)

Time: 15:45 - 17:30

color coded resistors

Topics

Introduction to the CS stage

The common-source stage is considered the basic amplifier stage in CMOS technology.

Presentation

The presentation “CS stage introduction” motivates the use of the CS stage as basic amplifier stage and summerizes the relevant performance aspects and design parameters of this stage.

Video

EE4109 2020 3_1: CS stage introduction.

Design of the static and dynamic performance of a CS stage between source and load

Demonstration

The design and analysis of the static and the dynamic behavior of the CS stage will be demonstrated with the LTspice and SLiCAP simulation tools.

Download “SLiCAP-CSstage.zip” and “LTspice-CSstage.zip” for running the analysis yourself.

Please upgrade to the latest version of SLiCAP_python: Version 1.0.1 before running the CS stage script.

Videos

  1. EE4109 2020 3_7: Jupyter Notebook demo displaying device characteristics of CMOS18 transistors.
  2. EE4109 2020 3_8: Static and the dynamic behavior of CS stage demonstrated with LTspice.
  3. EE4109 2020 3_9: Static and the dynamic behavior of CS stage demonstrated with SLiCAP.

Homework

  1. Download the CMOS18 library file for LTspice: CMOS18TT.lib.
  2. Design and bias an NMOS CS stage that can deliver a current of \(\pm5\) mA to a load of \(100\Omega\) when operating on a power supply of 1.8V. The stage should operate in strong inversion, but below critical inversion.
  3. Estimate the bandwidth of the source-to-load transimpedance of this stage and verify this estimation with SLiCAP and LTspice.