Some of My Projects and Work Done at Ryerson University...

ELE800 Thesis Design Project - "A World Class Audio Operational Amplifier"

The circuit designed by my partner Ka Kit Cheng and I for our fourth year, electrical engineering project at Ryerson University is presented below. This circuit was the result of about six hard months of research and design. The complete design and operation of this amplifier is explained in our thesis report. The project was a success and my partner and I learned many things about analog circuit design as a result of the project. Most of our sources for research were from the IEEE Xplore website, where we read the latest journals in state of the art, low voltage CMOS electronics.

Thesis Report Abstract

As part of the Engineering Design Project (EDP) for fourth year electrical engineering students at Ryerson University, this report will outline the important details regarding the development, design, and layout of a low voltage, single supply operational amplifier suited for very high quality audio applications. The operational amplifier was constructed in the Cadence 0.35 um environment and was able to achieve operation from a single 3 V supply, a 90 dB open loop gain, 3.66 V/us slew rate, 85% rail to rail output swing, a CMRR of 81 dB, a power supply rejection ratio of 108.9 dB, and a DC offset voltage 0.168 mV. The layout was completed for the circuit which was able to fit into a standard sized, 8-pin IC. The total area occupied by the layout was 100um x 70um using the Multifinger technique.

The full 30+ page report will be posted at a later date...

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My final project for the course ELE 704: Analog CMOS Integrated Circuits, taught by Dr. Fei Yuan.

--- A Low Voltage Class AB MOSFET Amplifier ---

Abstract: As part of the course ELE 704: Analog CMOS Integrated Circuits, a Class AB Low Voltage MOSFET amplifier was built and simulated using the Candence environment. The Class AB amplifier investigated had a bandwidth of 283.5 MHz, the input voltage range could be within 0 to 150 millivolts without distortion, and could produce an output swing of up to 60% of the supply voltage. The output impedance was found to be 22.47 Ohms, low enough to prove very useful for a voltage mode circuit.

More information about my final course project for ELE 704: "A low voltage, class AB amplifier."