Using one NPN transistor, one PNP transistor, one general purpose diode, one LED and two resistors, design a constant current source that drives a constant current of 20 mA through the LED. The circuit is supplied with 10V from an ideal voltage source. The general purpose diode cannot handle more than 10 mA. You MUST use all six components given. { Calculate the resistance of the two resistors. The transistors and the diode use Silicon (VT = 0.7V). Both transistors have B = 500. %3D

Using one NPN transistor, one PNP transistor, one general purpose diode, one LED and two resistors, design a constant current source that drives a constant current of 20 mA through the LED. The circuit is supplied with 10V from an ideal voltage source. The general purpose diode cannot handle more than 10 mA. You MUST use all six components given. { Calculate the resistance of the two resistors. The transistors and the diode use Silicon (VT = 0.7V). Both transistors have B = 500. %3D

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.2P: The temperature dependence of resistance is also quantified by the relation R2=R1[ 1+(T2T1) ] where...

See similar textbooks

Similar questions

The npn transistor is connected in a “diode” configuration. Use the transport modelequations to show that the i-v characteristics of thisconnection are similar to those of a diode as defined. What is the reverse saturation currentof this “diode” if IS = 4 × 10−15 A, βF = 100, andβR = 0.25?
The npn transistor is connected in an alternate“diode” configuration. Use the transport model equations to show that the i-v characteristics of this connection are similar to thoseof a diode as defined. What is thereverse saturation current of this “diode” if IS =5 × 10−16 μA, βF = 60, and βR = 3?
a. For the circuit given in the figure on the right, set VRL to 10Find the maximum and minimum value range of RL and IL that will hold in volts.b. As a regulator, without damaging the diodethe maximum diode required to operateCalculate the power.
1. Given a theoretical solar cell with open circuit (no load) output voltage of 0.55V and ideal diodeparameter Io=2x10-11 A (for some certain sunlight conditions).a. What is the internal diode current, equal to the solar current when there is no load?b. Assuming the solar current stays the same as found in (a), what is the load current andoutput voltage when a 100 Ohm load resistor is connected?c. Assuming the solar current stays the same as found in (a), what is the load current andoutput voltage when a 10 Ohm load resistor is connected?
a) Use the diode’s characteristic equation,ID=Is exp(VD/VT), to determine the currentsourceIso that the output voltage is 1.5 V. b) If a load is attached to the output that draws 1 mA, what is the output voltage? c) If the circuit heats up to 40◦C, what is the output voltage without a load?
Power Electronics Draws a current of 12 V and 0 - 25 mA from a DC voltage source that fluctuates between 15 - 18 V.A constant DC voltage source is obtained with a 12 V and 5 Ω zener diode to feed a DC receiver.is wanted to be. Since IZmin=5 mA for this zener diode, a) How many ohms can the current limiting resistor be?b) Find the min and max values of the full voltage at the load ends for the same resistance?
Derive the current equations for the circuit shown below, using the labels as shown.Note that rz here is a model of the parasitic imperfection of the Zener diode.a) IL = ?b) II = ?c) IZ = ?d) What impact does rz have on VL?
a. Design the network of below to maintain VL at 12V for a load variation(IL) from 0 mA to 200mA. That is determine RS and VZ. b. Determine PZ max for the Zener Diode if part (a).
A 10 V Zener diode is used to regulate the voltage across a variable loadresistor. The input voltage Vs varies between 13 and16 V. The loadcurrent (??) varies between 10 and 85 mA. The minimum Zener current is15 mA. Findi. The maximum value of Rsii. The maximum power dissipated by the Zener diode, using the value ofRs.
Q1: In this Zener diode regulator, the source voltage varies from 6 V to 14 V. Assume that the load current varies between 1 mA and 35 mA, and that the diode is an ideal 4 V Zener diode. What is the largest allowable resistance that will ensure the load voltage remains constant with variations in load current and source voltage? Please enter your answer to 3 significant figures. Q2: Given the circuit design for a Zener diode regulator in the Ques 1, what is the maximum power that will be dissipated by the Rs resistor? You are told that the source voltage Vs varies from 6 V to 11 V, the load current il varies between 2 mA and 45 mA, and the diode is an ideal 3 V Zener diode. You will need to recalculate the maximum allowable resistance Rs with your new values, as part of this question. Please enter your answer to 3 significant figures, and in Watts.
The circuit shown below is to be used to provide a stabilised output to the load. The Zener diode characteristic is also shown on the next page. Find the load voltage (VL) and source current (IS) if the battery voltage is 18 V, series resistance is 1.4 KΩ and load resistance is 11 KΩ. Additionally, determine the value of the source resistance (R) if the Zener diode is at the threshold of activating in its reverse bias. Comment on the purpose of having this value of R in the circuit.
A zener shunt regulator employs a zener diode for which VZ = 10.1 V at IZ = 10 mA while rz = 20 Ohm.The available supply voltage (VS) is 15 V, R = 200 Ohm, and the load resistance (RL) = 1.0 k a) Find VZ0. b) Calculate the output voltage (VO) (hint: The derived expression for VO can be used here without proof) c) If RL is changed so that the load current (IL) is increased to 20 mA, what is the value of the output voltage (VO)?