Electrical Engineering Design
Overview
The objective of this project is to understand the principles of a Darlington push-pull power amplifier and its application, design and construct an audio power amplifier on a vero board and heatsink and trouble shoot the circuit as well as testing the performances of the amplifier.
Approach
The components must be defined and selected from calculated and assumed design parameters and then solder onto the PCB board. The selection of the components will be tested prior to soldering using a prototype circuit constructed on a bread board.
Testing will involve measuring properties of the circuit performance under laboratory conditions. The audio amplifier uses a DC voltage power supply and outputs power up to a wattage of three.
The aim is to acquire a power efficiency greater that 45% (when tested with an 8Ω or 8.2Ω dummy load) The circuit consists of two stages:
The input stage where the input signal is received for voltage amplification.
The output stage where the current is amplified to run high power to the speaker.
The University of Sydney
Vishant Prasad