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Publication Date

Summer 2012

Degree Type

Thesis - Campus Access Only

Degree Name

Master of Science (MS)

Department

Engineering

Advisor

Sotoudeh Hamedi-Hagh

Keywords

feedback, operational amplifiers, pcb, power supply, regulator, variable-voltage

Subject Areas

Electrical engineering

Abstract

Wireless Local Area Network (WLAN) adapter cards are slowly replacing the wired Local Area Network (LAN) structures in many homes and business units. They provide the freedom to move around but still enable access to the web, as long as the access point can communicate with the device without hindrance. The data transfer rate, also called the throughput rate, is sensitive to the power supply. Any issue in the power supply affects the throughput rate and the user experience.

This thesis described the procedure to design a "power supply adapter board" to supply the required voltage to the WLAN card for internal testing purposes. The design consists of a Linear Drop-Out (LDO) regulator and operational amplifier (Op-Amp) in a difference amplifier configuration connected in a feedback loop to continuously monitor changing load conditions while simultaneously changing the output voltage of the regulator to keep it constant and glitch-free. This design, determined to be effective and efficient, has been developed under the auspices of Broadcom Corporation and is currently in use for the testing process with regard to new WLAN designs.

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