5 In the simple voltage regulator circuit shown in Figure P9.53, R must maintain the Zener diode current within its specified limits for all values of the source voltage, load current, and Zener diode voltage. Determine the minimum and maximum values of R which can be used. V, = 5 V+ 10% iz min = 3.5 mA Vs = 12 +3 V 1, = 15 2 izmax = 65 mA IL = 70+ 20 mA T's
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- Determine minimum and maximum input voltages required for proper regulation to be performed by a Zener diode when connected across a variable input voltage. Assume Izk = 1.0mA, Izm = 120mA, Vz = 10V and series current limiting resistor Rs = 5602. Draw circuit diagram and plot graph for reverse V-I characteristic and label proper values on graph.Negative Peak Clipper with bias circuit uses a germanium diode, with an input peak to peak voltage VPP=20 V and bias voltage VBias= 2.7 v. a) What is the function of the circuit? b) Draw the circuit diagram. c) Draw the input and output waveforms.Compared to an ideal PN diode, what are the different characteristics of a practical PN diode? Please list two different characteristics when the diode is reversed biased.
- 29. Does an increase in reverse bias for a Varactor diode cause an increase or decrease in capacitance? 30. If the load current through a SCR (Thyristor) reduces to almost zero, what will be the result?Draw the changes in Vi and Id of the ideal diode half-wave rectifier circuit in the figure. The frequency of the sine signal here will be taken as 50Hz. (Changes in Vi and Id will be drawn!!!)Determine the minimum value and the maximumvalue that the series resistor may have in a regulatorcircuit whose output voltage is to be 25 V, whose inputvoltage varies from 35 to 40 V, and whose maximumload current is 75 mA. The Zener diode used in thiscircuit has a maximum current ratingof 250 mA.
- Find the range of values that will keep the zener diode “on” (operating) in the figure. (Plot the Vy-Vi graph).What is an ideal diode? Draw its volt–ampere characteristic. After solving a circuit with ideal diodes, what check is necessary for diodes initially assumed to be on? Off?Determine the value of RL that will establish maximum power conditions for the Zener diode.
- The PIV for each diode in a full-wave center- tapped rectifier is............. Note: Vp(out) = peak output voltage. Choose correct answer : A) Vp(out) + 0.7 V B) Vp(out) – 0.7 V C) 2Vp(out) + 0.7 V D) 2Vp(out) – 0.7 V1 Negative Peak Clipper with bias circuit uses a germanium diode, with an input peak to peak voltage Ve-20 V and bias voltage VBi= 2.7 v. PP a) What is the function of the circuit . b) Draw the circuit diagram.In the circuit given in the figure, since Vi is a square wave with a frequency of 1 kHz and an amplitude varying between +5V and -5V; Vi and Vo voltages one after the other and in scale; a) Draw with Zener diode is not active ? b) Draw with the Zener diode on? (Assume the diodes in the circuit are ideal)