Answer to Question #50161 in Electric Circuits for tristan

Question

A temperature sensor produces an output of 100mV at 20°C and 200mV at 40°C.

The non-inverting configuration of the op-amp (shown below) is to be used.

The values of the Resistors used are such that the output voltage at 20°C will now be 1.1V.

What would the voltage of the output signal of the op-amp circuit be if the temperature around the sensor was now 40°C?

Answer 1

A Non-inverting OperationalAmplifier gives the output voltage which can be obtained from the input voltage by multiplying it by some coefficient which is defined by values of the Resistors of a Non-inverting Operational Amplifier. This coefficient is constant for all input voltages. So since the sensor produces 2 times larger voltage at 40°C than at 20°C, the output signal of the op-amp circuit will also be 2 times larger than it was at 20°C. It means that the voltage of the output signal will now be 2.2V.

Answer: 2.2V.