Amplifier Design


This amplifier produces an output voltage, Vo, that is proportional to the input voltage, Vs. The output voltage is measured using a voltmeter. The input voltage is the voltage of the voltage source. The constant of proportionality is called the gain of the amplifier. The value of the gain of the amplifier depends on the gain, Av, of the dependent source and by the values of the resistances, Rin and Rout.


The values of Av, Rin and Rout can be adjusted using the scroll bars.



Challenges:

  1. Set Rin = 10 and Rout = 100. Predict the value of Av required to cause Vo = 5.0. Use the scrollbars to check your prediction.

  2. Set Rin = 10 and Rout = 100. Determine the range of output voltage that can be obtained by adjusting the gain of the dependent source.

  3. Set Rin = 10 and Av = 50. Predict the value of Rout required to cause Vo = 32. Use the scrollbars to check your prediction.

  4. Set Rin = 10 and Av = 50. Determine the range of output voltage that can be obtained by adjusting the resistance Rout.

  5. Set Rout = 25 and Av = 50. Predict the value of Rin required to cause Vo = 24. Use the scrollbars to check your prediction.

  6. Set Rout = 25 and Av = 50. Determine the range of output voltage that can be obtained by adjusting the resistance Rin.

  7. Set Rin = 90 and Rout = 25. Predict the value of Av required to cause Vo = 24. Use the scrollbars to check your prediction.

  8. Set Rin = 90 and Rout = 25. Determine the range of output voltage that can be obtained by adjusting the gain of the dependent source.

  9. Set Av = 50. Adjust Rin and Rout so that Vo = 20.

  10. Adjust Av, Rin and Rout so that Vo = 75.

  11. Determine the largest and smallest values of amplifier gain that can be obtained by adjusting Av, Rin and Rout.