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.

3 A peak rectifier (peak tollower) Cir cuit is gian below. Vs is a GOH3 Sinuscidal Vollge with peak value Upz50V. 50V. The load resistance R= Sk . Find the Vallke of the capacitance C Such that the peak- to-peak ripple 2 volts. (idenl diede) Voltage Vr Vs

A 4.7 zener diode is connected to the base resistor. The left side of the resistor sits at about 12V. The right side of the biasing resistor is connected to the Zener and npn transistor. The Zener bias is 5mA. The base current needed is 80uA. What is the appropriate resistor for this circuit? (In kohms) I

Please answer the questions 1 c, and d with details on why it is true or false. Please make handwriting legible. Thank you.

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

b. Calculate the following about the circuit in the figure (If silicon diodes are employed in the rectification);i. the peak value of the output voltage considering the drop across each diode, Vpk.ii. the average voltage, Vdc. iii. The current through the load resistor, IL.iv. The current diode, Id.v. The frequency of the output signal, Fout.vi. Calculate the efficiency of the full wave rectifier expressed in percentage. vii. Sketch a graph of the input and output voltage against time.

ANSWER ALL WILL UPVOTE IF CORRECT 7. What is the maximum conduction angle for an SCR? a. 90, b. variable, c. 180, d.360 8. A breakover type of device can be represented as a long resistor with a diode tapped somewhere in the middle. a. SCR, b. BJT, c. FET, d. UJT 9. It is the ratio of the resistance at the base1 terminal to the resistance across the two bases. a. base resistance ratio, b. interbase resistance ratio, c. intrinsic standoff ratio, d. intrinsic resistance ratio 10. the duration (in degrees) of an AC cycle that the SCR is turned on a. turn on angle, b. firing angle, c. conduction angle, d. firing delay angle

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

a-Draw the cct Q1/(A) For the waveforms of s phase angle control Ac-Ac converter: - diagram and complete other waveforms. b- Derive the equation of V Mean and V Effective. c-If a л/6 compute the i/p P.F, average i/p current and o/p in this cct. (15M). Q1(B) Prove that the single phase half wave rectifier with load inductive that:- vdc= Vmax 2π [1+cos(+0)] (10M) Q2/(A) Design parallel inverter to generate square wave with frequency 400 Hz to supply resistive load 120 2,240 v, if the battery voltage 12. (15M) Q2/(B)What are the meaning of the following: - [choose five only] (10M) 1-PWM 2- Combined inverter 3-UPS 4- Triac. 5- Smart technology device 6-Switching mode regulator 7-Throsold v. Q3/(A) Three phase F.W.R is operated from a star connection 208v,60 Hz supply, RL=1002, this rectifier must supply a load of 40 2 at half its max. O/P v. Find: -1- Firing angle. 2-r.m. s and average o/p current 3- o/p frequency. 4- if the firing angle smaller than 60° 5-Draw the waveforms for all…

One component that does not need to be installed in the correct orientation is a: a. Resistorb. Diodec. Voltage regulatord.