Calcule a tensão de saída para o circuito da figura. Considere: \(\mathrm{V}_{1}=5 \mathrm{mV} ; \mathrm{V}_{2}=10 \mathrm{mV}\) e \(\mathrm{V}_{3}=15 \mathrm{mV} ; R_{f}=10 \mathrm{k} \Omega ; R_{1}=10 \mathrm{k} \Omega ; R_{2}=10 \mathrm{k} \Omega\) e \(\mathrm{R}_{3}=10 \mathrm{k} \Omega\)
A circuit diagram with three voltage sources (V1, V2, V3) connected to a summing amplifier. The amplifier has a feedback resistor (Rf) and three input resistors (R1, R2, R3). The output voltage (Vo) is to be determined.
A 30 mV
B 0V
C -30 mV
D 20 mV
E -20 mV