PoS080
Junior Member level 3
Hello EE friends,
I need help solving this sample circuit for class. The photo transistor is responding to a 5khz photodiode not shown. I need help solving out for the output voltage.
My understanding is that the phototransistor will turn on and off at the same rate as the photodiode, and the signal created will go to the inverting op amp to get amplified.
This is how I normally solve for an op-amp, but I'm not sure if I have an R1, and how to solve for the transistor.
I1 = I2
(Vin-0)/R1 = (Vout - 0)/R2
(Vin)/R1 = (Vout)/R2
Vin(R2/R1) = V out
I need help solving this sample circuit for class. The photo transistor is responding to a 5khz photodiode not shown. I need help solving out for the output voltage.
My understanding is that the phototransistor will turn on and off at the same rate as the photodiode, and the signal created will go to the inverting op amp to get amplified.
This is how I normally solve for an op-amp, but I'm not sure if I have an R1, and how to solve for the transistor.
I1 = I2
(Vin-0)/R1 = (Vout - 0)/R2
(Vin)/R1 = (Vout)/R2
Vin(R2/R1) = V out