Hello, I am having trouble calculating the input resistor voltages for a non-inverting voltage adder Op Amp circuit. I have attached a schematic below, but I would like to make a note about calculating based on a 2V DC input. I understand that the input resistors (R2 and R3) see 2V and 1V from the voltage divider of R4 and R5, the input voltage equals 1.5V, and the output equals 3V. However, I am having trouble with calculating the voltage drop across R2 and R3 mathematically.
Originally I thought that R2 and R3 would each drop their supply voltage of 2V and 1V, but during the lab I measured 500mV across R2 and -500mV across R3 (with respect to the input source). This is definitely not what I was expecting, and now I am wondering where I went wrong in my calculations. My textbook is not much help, as it only shows how to calculate gain and output voltage.
Any help would be greatly appreciated!
Originally I thought that R2 and R3 would each drop their supply voltage of 2V and 1V, but during the lab I measured 500mV across R2 and -500mV across R3 (with respect to the input source). This is definitely not what I was expecting, and now I am wondering where I went wrong in my calculations. My textbook is not much help, as it only shows how to calculate gain and output voltage.
Any help would be greatly appreciated!
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