Amplifier using Op amp

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Amplifier using Op amp

• Aaron Fry
• James Massey

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Project Circuit 05

• Amplifier for sinusoidal signals
• 1000Hz to 10kHz range
• Use commonly available operational amplifiers
• Single polarity voltage source

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Gantt Chart
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Original Amplifier Schematic
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Pspice Waveform Generation
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Input/Output Signal
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Schematic With Bandpass Filter
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Final Circuit
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Frequency 2 kHz
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Voltage vs. Frequency
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Bode Analyzer
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Frequency 10 Hz
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Frequency 10 Hz
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Frequency 100 kHz
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Frequency 100 kHz
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Increase Gain with Potentiometer
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Decrease Gain with Potentiometer
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Harmonic Distortion
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Total Harmonic Distortion

• Measures quality of amplifier

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THD before Bandpass Filter
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Dealing with Distortion

• Minimize gain
• Band-pass filter
• Increase DC voltage
• Automatic Gain Control

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THD with Bandpass Filter
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THD with Bandpass Filter cont.
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Total Harmonic Distortion
Average THD 0.67
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Budget

• Labor(10/hr 45hr 2) 900
• Circuit parts 25.29
• Resistors (6) 0.90
• Potentiometer 2.89
• Capacitors (4) 0.50
• Op amps (1) 1.00
• Wire 5.00
• Bread board 15.00
• Equipment usage 21.30
• Digital Multimeter 100 .0023 0.60
• Voltage Supply 150 .0023 0.90
• Oscilloscope 1500.0023 9.00
• Function Generator 1800.0023 10.80
• Subtotal 946.59
• Overhead 75 709.95
• Total 1656.54

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References

• Cadence PSD 15.1Pspice
• Comer, David. Comer, Donald. Fundamentals of
  Electronic Circuit Design. Wiley. 2003.
• Hayt, William H. Engineering Circuit Analysis.
  Sixth edition. McGraw Hill. 2003.
• http//hyperphysics.phy-astr.gsu.edu/hbase/audio/a
  mp.html
• http//ourworld.compuserve.com/homepages/Bill_Bowd
  en/opamp.htmbandpass.gif
• www.hyperphysics.phy-astr.gsu.edu/hbase/electronic
  /opampcon.html
• Smith, Ralph J. Electronics Circuits and
  Devices. Third edition. Wiley. 1987.
• www.me.psu.edu/me82/Learning/Op_amp/op_amp.html
• Lenk, John D. Simplified Design of IC
  Amplifiers. Butterworth-Heinemann. Newton, MA.
  1996.
• National Instruments Elvis software
• www.radioshack.com
• www.ni.com
• Terrell, David L. Op amps Second Edition.
  Butterworth-Heinemann. Newton, MA. 1996.
• Dr. Nutter