(a) For the circuit of Fig. P1.59, sketch and label vO versus vI over the range 25 V # vI # 5 V. (b) Assuming VD(on) 5 0.7 V, sketch and label vI , vO, and vA versus time if vI 5 (5 V) sin t. Hint:...

(a) For the circuit of Fig. P1.59, sketch and label vO versus vI over the range 25 V # vI # 5 V. (b) Assuming VD(on) 5 0.7 V, sketch and label vI , vO, and vA versus time if vI 5 (5 V) sin t. Hint: use the op amp rule, and convince yourself that at any given time one diode is on and the other is off.