EE
420L Engineering Electronics II Lab - Lab 7
Design of an audio
amplifier
Pre-lab work
Design an audio amplifier (frequency range from roughly 100 Hz to 20 kHz) assuming that you can use as many resistors, ZVN3306A transistors, and ZVP3306A transistors as you need along with only one 10 uF capacitor and one 100 uF capacitor. Assume that the supply voltage is 10 V, the input is an audio signal from an MP3 player (and so your amplifier should have at least a few kiloohms input resistance), and the output of your design is connected to an 8-ohm speaker (so, ideally, the output resistance of your amplifier is less than 1 ohm).
- Your lab report should detail your thoughts on the design of the amplifier including hand-calculations.
- A
good place to start is with the push-pull amplifier characterized in
lab 6.
- Simulate your design. Document the results in your lab report.
- Build and test your design.
- Document the performance of the design including power dissipation, output swing, input resistance, output resistance.
Ensure
that your html lab report includes your name, the date, and your email
address at the beginning of the report (the top of the
webpage).
When
finished backup your work.
Below is a comparison between driving a speaker without (red, Vout1) and with (black, Vout2) an audio amplifier. The source resistance is 10k meaning that the source can supply 1 V (blue, Vs) at 100 uA maximum. The simulation files used to generate this figure are found in lab7_sims.zip.
