146c5814_What_is_an_Ideal_Op_Amp___Ideal_Op_Amp
[Characteristics] Infinite Voltage Gain [Real Op Amp] A real op amp can only produce a finite gain. [Ideal Op Amp] 
An ideal op amp will have infinite voltage gain. Op amps are devices that many times are used to function as amplifiers. A voltage is input into the op amp and as output, it produces the voltage amplified. An ideal op amp will produce mega-gain, practically, it will be able to produce infinite gain. It will amplify the signal infinite times over so that we can have as much gain as we'd ever need.