Este esquema representa un DAC y un amplificador operacional. Necesito encontrar R1 y R2, así que se me ocurrió esta resolución.
(Vout has to be between [-10,10) V and Vr=10V,Rr=5k)
I1=current through R1,I2 current through R2.
Vout = R2*I2;(Kirchoff Vout,through R2 to the negative ground)
I1+I2-I=0 ==>I2=I+I1;(Kirchoff in node A)
I=Vr/Rr ==>I= 10V/5k==>I=2 mA;
I-I1=0=>I=I1=>I1=2mA;(not sure about this,node B)
10V(the superior limit)=R2*I2=>R2=10V/4mA=>R2=2.5k ,so R2 has to be
below 2.5 kohms
thus R1=Vr/I1 =>R1=5 kohms
[![enter image description here][1]][1] Do you think I have mistaken in my thinking here?
