This quantity is known as the line regulation and isusually expressed in mV/V.(b) Generalize the expression above for the case of m diodesconnected in series and the value of R adjusted so thatthe voltage across each diode is 0.7 V (and V. =0.7m V).(c) Calculate the value of line regulation for the casev* = 10 V (nominally) and (i) m =1 and (ii) m = 3.%3D *4.57 Consider the voltage-regulator circuit shown inFig. P4.57. The value of R is selected to obtain an outputvoltage V, (across the diode) of 0.7 v.VoFigure P4.57(a) Use the diode small-signal model to show that the changein output voltage corresponding to a change of 1 V inv* isAV.AV+V,%3DV* + V, -0.7

Consider the voltage-regulator circuit given below, The value of R is selected to obtain an output…

*4.57 Consider the voltage-regulator circuit shown in Fig. P4.57. The value of R is selected to obtain an output voltage V, (across the diode) of 0.7 V. m ▷ Vo Figure P4.57 (a) Use the diode small-signal model to show that the change in output voltage corresponding to a change of 1 V in V is AV AV+ V₁ V+ + V₁ -0.7

*4.57 Consider the voltage-regulator circuit shown in Fig. P4.57. The value of R is selected to obtain an output voltage V, (across the diode) of 0.7 V. m ▷ Vo Figure P4.57 (a) Use the diode small-signal model to show that the change in output voltage corresponding to a change of 1 V in V is AV AV+ V₁ V+ + V₁ -0.7

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Can the regulator given in Figure Q4.b be used to regulate the output of a full-waverectifier, given the specifications for Io and Vpk in the Table 4 above? The rectifier voltage varies between 0.7Vpk and Vpk (that is, the ripple voltage is 30%of Vpk). The value of the Zener voltage Vz is 5.6 V, and the Zener diode power ratingis 2W. The regulator must supply to the load the current of at least Io mA. mA = 160 V = 22v To answer this question, you need to determine the value of the resistor R for theoutput requirements specification for Io and Vpk given in Table 4.
4.18 At what forward voltage does a diode conduct a cur- rent equal to 10001? In terms of Is, what current flows in the same diode when its forward voltage is 0.7 V?
Q4: Consider a Zener diode with a nominal voltage (10v @ 10mA) and a resistance of 50 ohm. Calculate the expected Zener voltage if the diode current is doubled?
4.70 A full-wave bridge-rectifier circuit with a 500-2 load operates from a 120-V (rms) 60-Hz houschold supply through a 6-to-1 step-down transformer having a single secondary winding. It uses four diodes, each of which can be modeled to have a 0.7-V drop for any current. What is the peak value of the rectified voltage across the load? For what fraction of a cycle does each diode conduct? What is the average voltage across the load? What is the average current through the load? 6:1 120 V rms 20 Vms 10.5 kN D2 D3 Vp = 0.7 V ண
p4. A biased clamper is connected to a rectangular AC input with 20V on the positive half cycle and -10V on the negative half cycle. The orientation of the Si diode is the same with Vo while the 5V biasing voltage is in opposite connection. The value of R is 100K ohms while the capacitor is 1 microFarad. In P4, what is the voltage across the capacitor? a. 34.3V b. 14.7V c. 24.3V d. 20.7V
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For the circuit shown in the figure below, consider the diode as an ideal diode & R.M.S value of source voltage as Vs. The output voltage waveform at R is most likely to have: *
Q6. You need to connect three light emitting diodes (i) red, (ii) yellow and (iii) blue each to a 5V supply. Use the ideal diode plus voltage source model and for each of these LEDS calculate the resistor value that will produce a current of approximately 30 mA through the diode. Now select the actual resistor you will choose using the E12 resistor series and calculate the actual current through the LED in each case. It is given that the forward bias voltage drop over each of the LEDS are as follows: Vd = 1.5 V, Valow = 2.0 V and Volue = 3.5 V Diode Colour Red Yellow Resistor value Diode Current Blue
4. A voltage regulator circuit is shown on the right. The resistor value is chosen to obtain an output voltage (across the diode) of 0.7V. Use the diode small-signal model to determine the change in the output voltage when the supply voltage, V+, changes by IV. (This quantity is known as the line regulation and is generally expressed in mV/V) Hint: The answer will be only a function of V+ V+ ▷ R + Vo
Figure Q4.c shows an alternative regulator circuit that could be used in a DC powersupply design to regulate the output of a rectifier. Determine the suitability of the regulator for a rectifier with the output specifications asgiven in Table 4. The ripple voltage of the rectifier is 30% of Vpk, and the regulatorneeds to deliver to the load the current of Io mA.The Zener diode power rating is 2W. The required output voltage is 7.4V. For the circuit in Figure Q4.c: determine the required Zener diode voltage Vz; find a suitable value of the resistor R; determine the minimum requirement for the transistor power rating PTR. 2) What is the role of the resistor R in this circuit? Show your working throughout and state any assumptions you may make.Provide commentary to your design process, and evaluate your design.
At what input voltage is necessary that can open the diode considering a voltage drop across the diode, VD=0.9V after the diode breakover? NO NEED TO COMPUTE FOR CURRENT