Summary: Simulate a signal amplification circuit with an op amp. The adjustable signal voltage is replaced by a resistor voltage divider. The output of the op amp is the amplified signal output. The gain is designed to be 10 and all components should satisfy their power limit.
Schematic. The 5V power supply is replaced by one of the 12V.
Calculation for devising the circuit.
Components used for the circuit.
Collected data. The gain is close to 10.
Measure the power supply current to check if they satisfy the designed current limit. Because I(v1) support both the op amp and the circuit, it is much large than I(v2).
Follow up calculation.
Notes:
- Because only 1/8W resistors are available, all resistor are designed to satisfy 1/8W limit. Also, because 1k resistors were not available, the Ri and Rf were 2.2k/22k rather than 1k/10k.
- I measured the total current of power supply one, while I was supposed to measure the current going into the op amp. The KCL was not able to be verify.
- The gain is about 5% to 10% different to 10.
- If Rx and Ry are smaller, the result should be better because the amplification circuit has less effect on the series voltage divider.
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