$ 15.1 Constant-Gain Multiplier PROBLEMS 1. Calculate the output voltage for the circuit of Fig. 15.48 for an input of V, = 3.5 mV rms. 2. Calculate the output voltage of the circuit of Fig. 15.49 for input of 150 mV rms. 750 k2 +9 V 180 k2 36 kQ +12 V 3.6 k2 741 10 741 10 -12 V Figure 15.48 Problem 1 Figure 15.49 Problem 2

Consider a shunt linear regulator with Vin = 10V, Pz = 500mW, Vz= 2.5V and current limiting IR1(max) = 100 mA. Design a parallel regulator to yield a regulated output VOUT = 5.0 V. 10 V VINO VREF R₂ VEZDI www R₁ b) 0.5 W, 50% c) 1 W, 25% d) 1 W, 50% e) None of the above 2₁ a www Ry Vx 5 ΚΩ VouT 5V What is the rating (in Watts) for R₁ and efficiency of this linear regulator? a) 0.5 W, 25%

1a

For the oscillator circuit shown below, C1 = 15 pF and C 2= 180 pF and L = 1µH. a) Name the type of LC oscillator b) Calculate the frequency of oscillation. c) If the amplifier circuit is biased to provide a gain of 10, will the circuit oscillate? Why or why not? Vcc R4 Cout Q1 Cin R2 Re * Ce C1 * C2 ww-