module 2 lab_ELT-3060 Cameron Bennett

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?

An ac voltage of peak value 20v is connected in series with a silicon diode and load resistance of 5002 .if the forward resistance of diode is 102 find: i- Peak current through diode. ii- Peak output voltage. iii- What will be these values if the diode is assumed to be ideal (Vdiode =0)?

Consider the circuit with three diodes and a AC input, as shown below: D2 R1 D1 D3 R2 Assume that the input AC voltage is Ttsin(100TTT). You may consider the diodes to be ideal. mean voltage generated across resistor R2 is (assuming current direction to be from AC so into R1, through diode network, and through R2 from top to bottom): O a. 0.5V Ob. -0.5V O c. 1V O d. OV

perform dc analysis on a multiple diode circuit plz

Four diodes and one Zener diode are connected to form the circuit below. a) Describe how a single diode behaves when forward biased. 5) draw the output as the input changes from -12 V to +12 V. Assume that all diodes can be represented by a constant-voltage of 0.6 V (in forward bias) and the Zener diode has a breakdown voltage of 6.8 V. d) What is the function of the circuit? Suggest a proper application. I kN Da Dr

a) What is n-type semiconductor materials? What are the majority and the minority cariers? b) What is p-type semiconductor materials? What are the majority and the minority cariers? c) What is depletion region of a p-n junction diode? d) Describe in your own words the forward-bias and reverse- bias conditions of a p-n junction diode. e) Draw a Diode Symbol and label the anode and the cathode. Si Ge 2 ka f) Find V, in the circuit shown in +20 V 2 k2 15V Fig. Fuad Al-Mannai EENG261 Page 1

Analyse the voltage waveforms of the input, Vị and the output, V, for a clamper circuit shown in Figure Q3(b)(i) and Figure Q3(b)(ii). V. V. 10 V 3 V -10 -17 (i) (ii) Figure Q3(b) If the ideal diode is replaced with a silicon diode, explain the changes of the output voltage measurement.

Please answer all parts

4. If the diode is open in the circuit, the load voltage is? 5. If the resistor is ungrounded in the circuit, the voltage measured with a DMM between the top of the resistor and ground is closest to? 6. The load voltage measures 12 V in the circuit. The trouble may be? 7. Using the third approximation in the circuit, how low must R, be before the diode's bulk resistance must be considered? + Vs RL 1 k2 12 V Figure

Consider the circuit shown in Figure 2. The cut-in voltage of each diode is . Let and assume both diodes are conducting. Determine if this is a valid assumption and explain your answer. And calculate the values of IR, ID, Ip2, and V.. Rj =1.7 kQ ww VB =1 V D1 Dz R2D 4 kQ Figure 2

Suppose we have a 10-V-peak sinusoidal voltage source. Draw the diagram of a circuit that clips off the part of the sinusoid above 5 V and below -4 V. The circuit should be composed of ideal diodes, dc voltage sources, and other components as needed. Be sure to label the terminals across which the clipped output waveform vo(t) appears.

This multiple choice questions from electronics lab,please solve all ,it's easy for you ????

Design a voltage-regulator circuit to provide a constant voltage of 5 V to a load from a variable supply voltage. The load current varies from 0 to 100 mA, and the source voltage varies from 8 to 10 V. You may assume that ideal Zener diodes are available. Resistors of any value may be specified. Draw the circuit diagram of your regulator, and specify the value of each component. Also, find the worst case (maximum) power dissipated in each component in your regulator. Try to use good judgment in your design.

Analyse the voltage waveforms of the input, V; and the output, V, for a clamper circuit shown in Figure Q3(b)(i) and Figure Q3(b)(ii). Based on your understanding in electronic device field, develop a clamper circuit by referring to the input waveform, Vi and the output waveform, Vo given. Use ideal diode. Then, prove the value of V. (for positive cycle and negative cycle) by calculation technique. V. V. 10 V 3 V -10 -17 (i) (ii) Figure Q3(b)

diode zener a, DESIGN THE NETWORK IN THE FIGURE, TO KEEP, "VL" at 12 V for a variation in load (IL) from 0 to 200 mA, DETERMINE "Rs" and "Vz" b. determine "P2min" for the Zener diode from section a

A silicon diode is in parallel with a germanium diode and is connected to a load resistor having a value of 20 kQ and a forward supply voltage of 10 V. What is the approximate voltage across the silicon diode? * A. 10 V B. 1.0 V C. 0.7 V D. 0.3 V

In a Simplified Diode Model, up to the barrier potential or Vdiode the current through the diode is increasing. Select one: True False

A. In your own words and with the aid of suitable diagrams, describe the following: a) The zener diode and its characteristics. b) Design a limitter circuit using diodes to limit the output voltage to 4.7V during the positive signwave and to -6.7V in the negative signwave. B. Consider the following circuit. Suppose that diode D1 is ideal. a) Give the state of the diode D1: conductive or blocking. Explain. b) Calculate the current flowing through D1. c) Calculate the voltage VR2 across the resistance R2. 1kQ D1 R1 R2 1) ImA 10V 4KQ C. In the circuit shown below the knee current for the ideal Zener diode is 10 mA. Calculate the minimum value of load resistance RL in order to maintain 5 volts across the load resistance RL. 1002 IL 10V V, = 5V A R

There are three diode models namely (i) the exponential, (ii) ideal and (iii) the constant voltage source. a) Please define each model and provide the factors that influence the choice of a diode model when analyzing a circuit ? b) Please provide sketches of the I-V characteristic of each model.

A designer will be using a silicon diode over a temperature range of 0 to 75 degree Celsius. What is the minimum and maximum values of barrier potential? (Assume 0.7V at room temperature is 25 degree Celsius).