User manual

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Figure 3.1. Multisim Non-inverting Amplifying Circuit
In Figure 3.1, you can see a positive and negative power supply, which is necessary to allow the op-amp circuit to
provide a negative voltage at its output. You can also see that the circuit has two resistors: R1 (1 kΩ) and R2 (100 Ω).
As configured, this op-amp should present a voltage at its output (V Out) that is (1+ R1/R2) times greater than the
voltage at input (V In). Because R1 is 10 times greater than R2, the output should be approximately 11 times greater
than the input. Therefore, a sine wave with peak input voltage of 100 mV should yield a sine wave with the same
frequency and a peak voltage of 1.1 V at V Out.
Because this result is theoretical, you should expect something slightly different when dealing with a real circuit.
Fortunately, Multisim simulations take a number of these nonideal factors into account when simulations are
performed. Examine this during the discussion of the results presented from the virtual oscilloscope in the Multisim
simulation as seen in Figure 3.2.