-10.0 V Zero current Zero voltage in forward bias region in reverse- Vertical bias region 100 . 15 vE Load lip (a) Circuit diagram (b) Ideal Zener-diode characteristic Figure 9.14
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Consider the Zener-diode regulator shown in Figure 9.14 on page 470. What is the minimum load resistance for which vo is 10 V?
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- Draw the V-I characteristic curve of a Ge based Zener diode with Zener breakdown voltage (?z=5 ?). Indicate three different regions of the curve. Subject: Electronic devicesQ.1 A single-phase diode bridge rectifier is connected to a grid with rms voltage V, 230V at 50 Hz. Assume that the load is highly inductive, so it could be represented by a constant dc current, Id = 10A. a) Sketch the load voltage and find the average voltage of the load? b) Sketch the source current (grid. AC side) and find the rms value of the source current? c) Determine the fundamental source current and the first three harmonics? Assume Ish_rms ³ 0.91a/h for odd hand 0 otherwise?Q ) For the full- wave uncontrolled rectifier circuit supplying a series resistive Thesupply voltage is v =300 sinωt , the supply frequency is 50 Hz and the loadparameter values are: R =05 Ω,a) Sketch the diagram of electrical circuitb) Sketch the load voltage and current waveforms .c) Calculate the load currentd) Calculate the average DC load voltage Vdc .e) Calculate the supply power to the loa
- Q: A single-phase, full-wave diode bridge is used to supply power to aresistive load of value R = 75 Ω. If the supply voltage is sinusoidal,Vs = 400 sin ωt, Calculate: 1) the average and rms values of the load current. (IL rms), (Idc) 2)the ripple factor (RF)for the load current wave operation.A schematic design of a full-wave bridge type power supply is given below. Provide the appropriate values for the inductors, diodes, capacitor and resistors, such that the output DC voltage is 6.2 V and the max. output power for the load resistance is 20 mW (percentage error for output voltage and output power is 2%). AC voltage source: Amplitude=311.13, Freq=60, DC offset= 0. For the rectifier part, choose diodes with an appropriate PIV rating. Show all the formulas and computations involved in acquiring the values for the inductors, diodes, capacitor and resistors. In choosing your Zener diode, consider the output voltage and the output current. Note that the output current should be the minimum Zener current. For the value of the series resistor RS, choose a lower value for less ripple but always consider the required output voltage. The ripple voltage peak-to-peak value should be less than or equal to 1% of the required output voltage. Use the formula below for choosing the value…how to derive this formula? Bdc= Ic/Ib=hFE
- Consider the full-wave rectifier circuit shown below, where• vS(t) is a sinusoidal signal with a peak value (Vs = 5 V).• Diodes are modelled using constant voltage model with VDO = 0.7 V• The ac line voltage has an rms value of 120 V and a frequency (f) = 60 Hza) Calculate the transformer turns ratio. b) Plot in the same graph signal vS(t) and the output signal vO(t) versus time (t) (show all details including amplitudes, time instances, etc.) c) Calculate the rms value of the output signal vO(t). (hint: sin2(x) = 0.5(1- cos(2x))) d) If a capacitor C=3.58 F is connected across R = 10 k, repeat (b) in a new graphCalculate the power rating of a zener diode connected across load working in reverse biased condition when the breakdown occurs at the current twice the test current, where VZ = 30 V, VZK =28.5V, IZK= 2mA, IZ= 10mA . Also calculate the minimum load resistance value with input voltage at Vs= 60 V and series resistance 450ohms.Draw the circuit diagram of the chopper circuit which is designed by IGBT and used in quadrant 4 operation. Describe the current flow bath for the quadrant 4 operation.
- Consider the diode circuit shown below. If Vs is a sinewave with a peak amplitude of 12 Volts at 60Hz, and diodes D1 & D2 are considered ideal, sketch the appearance of the waveform at node voltage Vout . Sketch the appearance of the waveform at Vout .Consider a three-phase diode rectifier supplying a R = 10 Ω DC load. The supply systemis 440 VLL and 60 Hz. A) What is the value of the average (DC) current across the load?B) Compute the value of an inductive filter (L) to be added in series with the resistiveload to limit the rms value of the lowest order current harmonic to 1% of the DC currentvalue. Note: 2 /[( 1)( 1)] Vdch = Vdc0 h − h + (in rms).Draw the circuit diagram of a single phase full-wave uncontrolledrectifier with R-load. Describe its principle of operation. Draw thewaveforms of: input voltage, voltage across the load, current throughthe diodes and their voltage. Write the expressions for: the averageoutput voltage Vd, the maximum reverse voltage across the diode and thestandard transformer power. Describe what the difference will be if acapacitor is added in parallel with the load at the output.