1. The input signal in Figure 1(a) is applied to the comparator in Figure 1(b).Draw the output showing its proper relationship to the input signal. Assume the maximum output levels of the comparator are (+/-)12 V. Values of R1 and R2 are as follows. (a)R1 = 7 K Ohm, R2 = 3 K Ohm (b)R1 = 3 K Ohm, R2 = 7 K Ohm Handwriting +10 Volt 5 V R1 Vin O oV out V Vin R2 -5 V Figure 1(b) Figure 1(a)

Explain the operation of the opamp circuit in the figure. In what situations does the LED illuminate; In whatsituations does it stay dim? What is the type (function) of the circuit?

60 V D1 D2 2 kohm DA D3 -60 V Assume that an input signal is applied to the circuit given above, as shown in the figure next to it. Accordingly, answer the following questions. The diodes used are silicon diodes, their operating voltages are 0.7 volts, and can be omitted because their resistance is very small. Calculate V p-out( Vm ) for this circuit.

A full-wave bridge rectifier is to be designed to produce a peak output voltage of 10 V, deliver 100 mA to the load, and produce an output with a ripple of not more than 7.5 percent. Assume that the frequency of the source is 50 Hz, and that a constant drop voltage model with Vp = 0.7 V is t of used. D1 D2 vs(1) RL vz(?) D3 D4 Source Rectifier Load a) Calculate the needed value of the load resistor R1. 1 b) Calculate the peak value of the voltage source which should be used V (t). [ c) What will be the value of the ripple voltage V7 [ d) Calculate the value of the required capacitor C. [ e) Explain in your own words the difference between the output with and without using the capacitor in the circuit above.