64) answer just two from three the following terms: A) Design ADC using the successive method if the Vmax=(3) volt, Vmin=(-2) volt, demonstrate the designing system for vin-1.2 volt. Successive Approximation ADC Input Voltage-1.1 V -4-3.5-3 -2.5 -2 -1.5 +1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 1 T -8 -7 -6 -5 -3 +2 -1 0 1 2 3 4 5 6 7 X=1??? 1st guess: -0.25 V (too high) X=11?? 2nd guess: -2.25 V (too low) 3rd guess: -1.25 V (too low) X=1110 X=111? 4th guess: -0.75 V (too high) Make successive guesses and use a comparator to tell whether your guess is too high or too low. Each guess determines one bit of the answer and cuts the number of remaining possibilities in half.

1) AC power in a load can be controlled by using a. Two SCR's in parallel opposition b. Two SCR's in series c. Three SCR's in series d. Four SCR's in series 2) The advantage of using free - wheeling diode in half controlled bridge converter is that a. There is always a path for the ac current independent of the ac line b. There is always a path for the dc current independent of the ac line c. There is always a path for the dc current dependent of the ac line d. There is always a path for the ac current dependent of the ac line 3) Silicon controlled rectifier can be turned on a. By applying a gate pulse and turned off only when current becomes zero b. And turned off by applying gate pulse c. By applying a gate pulse and turned off by removing the gate pulse d. By making current non zero and turned off by making current zero

Set up a midpoint bias for a JFET with IDSS = 14 mA and VGS(off) = -10 V. Use a 24 V dc source as the supply voltage. Show the circuit and resistor values. Indicate the value of ID. Indicate the value of VGS. Indicate the value of VDS.

The positive peak value of output waveform for the given circuit diagram is...... (VPP of input is 14 V, Bias voltage is 4 V, Diode is germanium) R1 I D, VIN VouT

Question 8 Calculate the expression of the peak-to-peak voltage ripple of the step-up converter in the case of the discontinuous conduction mode using the circuit parameters.

A fully controlled, single-phase bridge rectifier is powered from an ideal 220V, 50Hz source. The rectifier is triggered with a trigger angle of 60 degrees and provides a smooth current of 50A to the load at the output. According to this: a) Draw the waveform of the output voltage in scale and calculate the average value of the output voltage. Combine the average voltage signal with the output voltage wave signal. Show on the same figure. b) Draw the waveforms of the thyristor currents, the gap diode current and the current drawn from the source in scale. c) Calculate the value of the filter inductance used at the output when the ripple in the load current is 3A. (Do the operations by showing the output voltage shapes and areas on the figure. The answers should be in the system and order in the solved examples.)

Find VDc if VAN = VBN = VCN= 120 volts... Half-wave Three-phase Rectifier Conduction Waveform Periodic Time (T) A B 180 360 90° 450 540 time 270 VAN VeN VAN VEN Voc Vrc 30 120 150 270 390 510° time Output Voltage Waveform B

consider the following specifications for buck converter : Vin= 80v, Ro = 9 ohms, Po = 100watts, frequency is 150khz. determine a. the inductor value at the boundary condition. b. the maximum inductor current value for L = 10 Lcrit. (c). the doide rms and average current values

How would you reduce Req of a circuit by adding a resistor – numerical piece to follow.

Draw the circuit diagram of a simple voltage regulator.