EE331L Analog Electronics Laboratory 2

A Phase shift Oscillator

Introduction: 

Most of you have or are currently taking “Feedback Control Systems”.  In this lab you will build an oscillator using a “Phase Shift” design and Operational amplifier(s).  The end result should oscillate reliably at your designated frequency (different for each group).

Procedures:

  1. Build a Discrete Component Amplifier

§  Design, simulate and implement a Phase Shift Oscillator as described in the above Wikipedia article that is intended to oscillate at a specified audio frequency.

§  You may use your own design and may choose from any op amp and other components present in the teaching lab. 

§  The output signal will be a one volt peak-to-peak amplitude sinusoid,

§  Use an oscilloscope to capture test waveforms from your amplifier before presenting your design.

  1. Simulate and test your circuit

§  First simulate your design in BOTH MatLab and Multisim to determine that your design will perform as desired.

§  Run a Multisim Monte-Carlo simulation to determine the impact of component tolerances on your oscillator design.

§  Once you have built your circuit to your satisfaction, we will test all of those circuits on the same platform..

 

Analysis and Report:

Please complete a brief lab report (2-3 pages).  Focus on explaining your design process.  Explain how you chose the overall circuit design and the key components.  Explain the important parameters and effects of your circuit, as well as how it could be improved in the future, or with more resources.  Your report should address the following:

§  Circuit Diagram

§  Waveforms, both from simulation and physical tests.

§  Amplitude and Frequency sensitivity to component precision.

§  Power considerations

 

Your lab report is due midnight on Friday following the testing session.