1. The problem statement, all variables and given/known data I have some problems determining the tension output value for this circuit and this confusion comes from the presence of positive feedback and an alternate current.Since I'm used to negative feedback circuits and direct current it confuses me a bit,so any help is deeply appreciated!The objective of calculating the output value of the circuit is so we can represent that signal on paper. 2. Relevant equations I know that the equation for alternate current is v=vout*sinw*t ,where w=angular frequency The angular frequency is calculated by w=2*pi*f f=0.5Hz and amplitude=1v; The equations for the currents in this circuit would be: I1=I2 + Iout 3. The attempt at a solution So, using the above equations we have: (1- Vp)/500=(Vp-Vout)/2000 + (Vp-V0*sinw*t)/R2 What I'm not sure if it's correct is the current that goes through Rin2.Does it still work like a DC circuit where to calculate the currents,we want the difference between the tension in both terminals divided by the resistance?And how the we know what is the value of vp if we want to solve in order to vout so we can represent the signal ?