Response to the following problem:
In the circuit shown in Figure, diodes D1 through D4 are identical, and each exhibits a voltage drop of 0.7 V at a 1-mA current.
(a) For small input signals (e.g., 10-mV peak), find the small-signal equivalent circuit and use it to determine values of the small-signal transmission vo/vi for various values of I: 0 μA, 1 μA, 10 μA, 100 μA, 1 mA, and 10 mA.
(b) For a forward-conducting diode, what is the largest signal-voltage magnitude that it can support while the Corresponding signal current is limited to 10% of the dc bias current? Now , for the circuit in Fig. P4.51, for 10-mV peak input, what is the smallest value of I for which the diode currents remain within ±10% of their dc values?
(c) For I = 1 mA, what is the largest possible output signal for which the diode currents deviate by at most 10% of their dc values? What is the corresponding peak input? What is the total current in each diode
