Given the circuit below with transistor β = ∞; VBE = 0.7V; diode forward bias voltage is 0.7 V. Find the voltage VOUT and VA.

2. Plot the transfer function, and clearly indicate the on/off conditions of each diode, the slope of the line, and the voltages of turning points in each operating region for the following circuits. Assuming the constant-voltage model (VD,on = 0.8 V) is used to determine the DC level. Also, Plot the output waveform in time-domain if the input signal is as shown below with the amplitude and other important values labeled in the figure. (a) (b) Vin R= 500 D₁ V₁= 2.5 V D₂ A V₂ 1.6 V D₁ 2R 2X4 2R D₂ 3R out Vout Vin Vin 10 mv 1-AAAA-3.4 V >t 5 V

Assume now that the diode D1 is forward biased. Represent the diode with the constant voltage drop model (0.7V) and determine the expression (or value) for the voltage that appears across the diode, VD. This gives you the other part of the transfer function.

In this Zener diode regulator, the source voltage varies from 7 V to 12 V. Assume that the load current  varies between 2 mA and 31 mA, and that the diode is an ideal 3 V Zener diode. What is the largest allowable resistance  that will ensure the load voltage  remains constant with variations in load current and source voltage? Please enter your answer to 3 significant figures.