Description

This is a three-part lab for undergraduate students to learn open source analog IC design. It is designed to accompany ECEN 4313: Linear Electronics Circuit Design at Oklahoma State University (Fall 2022)

Course Description

Overview of semiconductor device physics (MOSFETs and BJTs) and integrated-circuit design environment. Building blocks for analog systems (differential amplifiers, operational amplifiers, output stages, and voltage references). Understanding of frequency response (Bode plot, transfer function, pole-zero analysis, feedback, and stability). Extensive SPICE-based design for performance optimization and design tradeoffs.

Lab Description

This lab was modified from previous labs designed for Cadence Tools. The process was changed from UMC 130 nm to SkyWater 130 PDK.

Lab 1: CS Stage

Objective: Build and simulate a single-stage common source amplifier using an NMOS and a resistor. Students should learn to:

1. Select the appropriate device based on voltage ratings
2. Schematic capture using xschem
3. Run DC and transient simulation using ngspice.
4. Adjust transistor sizing and biasing conditions to meet specifications

Specifications: Try to meet as many specs as possible for the TT corner.

Lab 2: Single-Stage OTA Design

Objective: Build and simulate a single-stage common source amplifier using an NMOS and a resistor. Students should learn to:

1. Use hand calculations to guide the initial design
2. Fine-tune transistor sizing based on simulations
3. Run AC simulations (or other methods) to check frequency response

Specifications: Try to meet as many specs as possible for the TT corner.