* Aquí se presentan dos configuraciones de OPAMs más complejas:
1) Amplificador inversor aditivo.
Vout= -Rf x (V1/R1+V2/R2+...+Vn/Rn)
Ej Vout= -3k x ( 1v/1k+2v/2k+3v/3k)= -6v
2) Amplificador diferencial.
Vout= V2 x (1+R2/R1) x ((R4/(R3+R4)) - V1 x (R2/R1)
R1 se conecta entre (-) IN opma a V1
R2 se conteta entre Vout a (-) IN
R3 se conecta entre (+) IN a V2
R4 Se conecta entre GND y (+) IN
SI R1=R3 y R2=R4.
La ecuación se reduce a :
Vout= (R2/R1) * (V2-V1)
OPAMs que se pueden usar: LM 741, LM 358, LM 324.
* Here are two confirgurations of OPAMs a little more complex:
1) Additive inverse amplified
Vout= -Rf x (V1/R1+V2/R2+...+Vn/Rn)
Ej Vout= -3k x ( 1v/1k+2v/2k+3v/3k)= -6v
2) Differential amplifier
Vout= V2 x (1+R2/R1) x ((R4/(R3+R4)) - V1 x (R2/R1)
R1 is connected between (-) IN Opam to V1
R2 is connected between Vout and (-) IN
R3 is connected between (+) IN Opam to V2
R4 is connected between GND and (+) IN
If R1= R3 and R2= R4
Then equation is reduced to:
Vout= (R2/R1) * (V2-V1)
OPAMs that can be used: LM 741, LM 358, LM 324.
