OPAMP is an electronic circuit module made up of components like transistors, resistors and diodes all into one. Originally, OPAMPS were named because they were used to model the basic mathematical operations add, subtract,integrate and differentiate in analogue computers.
Characteristics of an Ideal OP-AMP
The ideal op-amp has:
-open-loop gain infinite,
-infinite bandwidth
-Infinite input impedances so that no current is drawn
-Zero output impedance so that maximum current is transferred to the load.
-input offset zero
-No thermal drift.
Inverting op-amp
Vin goes to (-) inverting input
If Vin =14 ,R1/Rf=15000, Rin=180
the Rf(R1) resistor is counted as a minus
formula is Vout=Vin(-Rf/Rin)
Vout=14(-15000/180)
Vout=-1166 use 1k2
Non-Inverting op-amp
Vin going to (+) non inverting input
Vin=27, Rf=150000,Rin=390
In a non-inverting op-amp we have to add +1 to Rf/Rin
so Vout=Vin(1+Rf/Rin)
Vout=27(1+150000/390)
Vout=10411 use 10k
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