Search for question
Question

Problem: The circuit in Fig is a summing amplifier. The positive supply voltage of the operational amplifier is 15 V and the negative supply voltage is -15 V. +15V 10ΚΩ 10kQ 10ΚΩ VR www www -15V VIN www VOUT 10ΚΩ Assuming the output of the potentiometer is VR, please derive an expression for VOUT in terms of VIN and VR. If VIN is a 2.5 kHz sine wave signal with an amplitude of 2 V and a zero DC offset, please determine the theoretical value of VR so that the output signal VOUT has a DC offset of 2 V. ➤ Build up the circuit in the LTspice simulator to verify your calculation and capture the waveforms of the input and the output signals.