use the formula voltage gain = Vout/Vin
recall and use the definition of bandwidth of an amplifier as the frequency range over which the voltage gain is within 70% of the maximum;
draw and recognise the inverting opamp amplifier circuit and describe its applications;
use the formula V_{out} = – R_{f}
V_{in} R_{in}
recall that the input resistance is equal to the value of the input resistor, and that the circuit has a virtual earth point;
Explain in terms of the difference between the inputs of the amplifier what is meant by a virtual earth? 
If R_{a }= 1000 W and R_{f} = 100000 W, what is the gain of the inverting amplifier? 
Summary

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