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Construct a circuit with the Non-Inverting Amplifier
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Compare the Gain of the Op-Amp circuit with hand-calculated result, the simulation, and the observed waveform in the oscilloscope.
Note that the op-amp needs Vcc+ and Vcc- as the power supply.
- Cadence OrCAD for simulation
- Breadboard
- Circuit Components from the schematics
- Oscilloscope
- Power Supply
- Signal Generator
| β | Vs (mV) | Vo (mV) | Gain (Vo/Vs) |
|---|---|---|---|
| 0 | 200 | 200 | 1 |
| 0.5 | 200 | 354 | 1.77 |
| 1 | 200 | 1534 | 7.67 |
The same circuit built in OrCAD simulation.
To simulate the two resistor that changes with β, we used a potentiometer.
All values are within 1% difference.
| β | Vs (mV) | Vo (mV) | Gain (Vo/Vs) |
|---|---|---|---|
| 0 | 199.97 | 199.97 | 1 |
| 0.5 | 199.94 | 353.73 | 1.77 |
| 1 | 199.9 | 1533 | 7.67 |
The same circuit built on a breadboard. The oscilloscope probe connected to the blue wire gets the Vo.
| β | Vs (mV) | Vo (mV) | Gain (Vo/Vs) |
|---|---|---|---|
| 0 | 213 | 240 | 1.13 |
| 0.5 | 209 | 400 | 1.91 |
| 1 | 209 | 1550 | 7.42 |
| β | Gain (Hand-Calculated) | Gain (Simulated) | Gain (Measured) | % Difference Simulated and Measured |
|---|---|---|---|---|
| 0 | 1 | 1 | 1.13 | 13 |
| 0.5 | 1.77 | 1.77 | 1.91 | 8 |
| 1 | 7.67 | 7.66 | 7.42 | 3 |
We hand-calculated the gains of the op-amp with different potentiometer values from Vo/Vs, where Vs is the 200mV input. In the lab, we simulated and constructed the circuit, collected the Vo, and calculated the gain. Finally, we compared the hand-calculated result, simulation result and measurement result.