Question 2: The following circuit is a square-Wave generator, Determine the Values of Rand R, Such that the oscillation frequency is 200 HZ, Sketch the Waveforms for Vo and V₁. Giver: C = 0.1uF, R₂ = R3 = 100k Op amp A, is ideal and Power by ± 15V Supplies. Zener diodes D, and D₂ are ideal with V₂ = 10v at I ₂ = ImA. R R₁ V₂ R₂ 2 2 D₂ D₁
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- In the figure given we have u(t)=10· coswt [V]. We assume the diodesand the A-meter (A) to be ideal.a) Plot the waveform of the current flowing through the A-m in scale.b) What is the reading of the A-m, if it is moving-coil type?c) What is the reading of the A-m, if it is moving-iron type?d) Calculate the power factor of the WHOLE structure.In a Zener regulated DC power supply, the input to the regulator varies between 15 V and 19 V. The magnitude of the series resistor in the regulator circuit is 40 Ω, and the load draws a constant current of 100 mA at 9 V. Use the ideal Zener diode model. The Zener diode specifications are given as : VZ(N) = 9 V, IZ(min) = 25 mA, and IZ(max) = 200 mA. 1) What is the minimum current that will flow through the zener diode? 2) What is the maximum power that will be dissipated by the zenere diode? 3) What is the maximum power dissipated by the series resistor?Exercise 3: In the circuit of figure below, the diode is assumed to be perfect. The transformer secondary has zero resistance and delivers voltage ve(t)= V msin wt. 1. Draw the waveform of vs(t) when the capacitor is disconnected. 2. The capacitor being switched on, we assume that the start of the charge is at time t = 0. a. Give the expression of the current i(t); we will then suppose x(t) = wt b. Determine the angle x1(t) = wt, of the end of conduction of the diode. 3. When the diode has stopped conducting, what is the equivalent circuit in figure below? Write the differential equation governing this circuit. Give its general solution. Deduce the expression of vs(t) for the discharge phase of the capacitor. 4. Write the mathematical condition corresponding to the angle x2(t) = wt2 end of discharge of the capacitor. 5. Deduce the approximate waveform from the filtered voltage Vs(t).
- A FW rectifier is required to deliver 48VDA with 10% ripple on a 7.5Ω resistor. a)Identify the capacitor providing these values (capacitance and ripple current - ripple current). b)Identify the necessary welding transformer for 120VAA 60Hz welding.c) Find the required serial inductance value for continuous current withdrawal from the sourceGiven the schematic below, assume D1 and D2 are silicon with forward voltages of 0.7V. Find the following (with solutions) a) Conditions required wherein none of the diodes are conducting b) If both diodes are not conduction, what is Vo? Express in terms of Vi c) Plot the overall relationship of Vo and Vi in the coordinate system shown below. Remember, you are to plot the transfer characteristics of the circuit.DiodesFill in the blanks with the words belowcheck valve, conductance, convert, crystalline, impurities, infinite, galena, p–n junction, rectifying,resistance, selenium, semiconductor, switching circuits, tailored, temperature, threshold, two-terminal,unidirectionalA diode is a 1 ………………… electronic component that conducts current primarily in one direction(asymmetric 2 ………………..); it has low (ideally zero) 3 ……………… in one direction, and high (ideally4 ………………..) resistance in the other. A 5 ………….. diode, the most common type today, is a 6……….. piece of semiconductor material with a 7 ………………. connected to two electrical terminals. Avacuum tube diode has two electrodes, a plate (anode) and a heated cathode. Semiconductor diodes were thefirst semiconductor electronic devices. The discovery of crystals' 8 ……………… abilities was made byGerman physicist Ferdinand Braun in 1874. The first semiconductor diodes, developed around 1906, weremade of mineral crystals such as 9 ……………….. . Today,…
- Design a DC power supply using FWR to perform the following requirements. Find V_dc, V_rms, V-ripple, PIV of the diode. draw the waveform of (V_in, V_out, L_in, I_load, V_diode and I_diode). Input voltage = 25 Transformer turn ratio 0.1 load resistance = 1k ohm Ripple factor = 0.025 Diode type =Si2. A certain zener diode has a maximum power rating of 300 mW at 40 deg Cand a derating factor of 1.4mW/deg C. Determine the maximum power the zener can dissipate at a temperature of 80 deg C. 3. From the datasheet, a 1N4728A zener diode has a ZZ of 10 0. The datasheet gives VZ = 3.3 V at a test current, IZ, of 76 mA. What is the voltage across the zener terminals when the current is 90 mA? When the current is 45 mA?SPECS: For the following circuit, both sources are equal, they supply the input voltage Vin, withfunction Vin = 15 sin (ωt) V, a frequency of 60 Hz.These sources connect to a set of diodes that behave ideally as shown. in the figure. Both resistors R1 and R2 are 2.2 kΩ. CURCUIT: The output voltage VA (observe the pin from which it is measured) as a functionmathematical input voltage Vin. Plot the curves of Vin and VA on different graphs.
- A crystal diode having internal resistance rf, = 20ohm is used for half-wave rectification. lf the applied voltage v = 50 sin wt and load resistance RL, = 800ohms find: 1. I m, l dc and I rms 2. a.c. power input and dc power output 3. DC output voltage 4. Efficiency of rectificationConsider the battery-charging circuit shown in Figure 9.25 on page 476, in which vs(t) = 20 sin(200πt) , R = 80 Ω , VB = 12 V and the diode is ideal. a. Sketch the current i(t) to scale versus time. b. Determine the average charging current for the battery.Provide a complete solution 1.) A full-wave rectifier (operating from a 60-Hz supply) drives a capacitor-filter circuit (C = 100 uF), which develops 12 V dc when connected to a 2.5-kiloOhms load. Calculate the output voltage ripple. (answer= 0.12 V rms) 2.)A full-wave rectifier operating from the 60-Hz ac supply produces a 20-V peak rectified voltage. If a 200-uF capacitor is used, calculate the ripple at a load of 120mA