As long as both diodes are off, the circuit of Fig. P1.25 is an inverting amplifi er giving vO 5 2R2yR1)vI . But what if either diode conducts? Analyze the circuit and then sketch and label its VTC...

As long as both diodes are off, the circuit of Fig. P1.25 is an inverting amplifi er giving vO 5 2R2yR1)vI . But what if either diode conducts? Analyze the circuit and then sketch and label its VTC over the range 27.5 V # vI # 17.5 V. Show all breakpoints and slopes. Hint: examine fi rst the case vI $ 0, and show that with vI 5 0 V, D2 is off, but increasing vI will eventually turn D2 on. Then, exploit the fact that circuit behavior for vI , 0 is symmetric of that for vI . 0