The output power may be bigger than the input power.The output current may be bigger than the input current.The output voltage may be bigger than the input voltage.Current Gain = Current out / Current inĪmplifiers have one or more of the following properties.Gain is a number (with no units) used to describe how much bigger a signal becomes when it is amplified.
The image below shows ideal (black) and non-ideal (red and blue) behaviour including clipping when the op amp is saturated and the output voltage can go no higher.Īmplifiers increase the magnitude of the input signal. The output should be directly proportional to the input.Most op amps fall short by about two volts so with a 12 volt supply, the output would be only ten volts.A very good op amp could provide outputs at least up to the power supply voltages.An ideal op amp could provide an infinite output voltage range.Everyone Ideal Operational Amplifier Properties Characteristics
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