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Homework Answers
(a)
.
n-Channel Enhancement type MOSFET a) Transfer Characteristics b)
Output Characteristics
(b) There are several types of diodes are available for use in electronics design, namely; a Backward diode, BARITT diode, Gunn Diode, Laser diode, Light emitting diodes, Photodiode, PIN diode, PN Junction, Schottky diodes, Step recovery diode, Tunnel diode, Varactor diode and a Zener diode.
AND
Types of Thyristors
Based on turn on and turn off capabilities the thyristors are classified into the following types:
- Silicon controlled thyristor or SCRs
- Gate turn off thyristors or GTOs
- Emitter turn off thyristors or ETOs
- Reverse conducting thyristors or RCTs
- Bidirectional Triode Thyristors or TRIACs
- MOS turn off thyristors or MTOs
- Bidirectional phase controlled thyristors or BCTs
- Fast switching thyristors or SCRs
- Light activated silicon controlled rectifiers or LASCRs
- FET controlled thyristors or FET-CTHs
- Integrated gate commutated Thyristors or IGCTs
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Question 1 (a) Draw the actual OR the idealized i-v characteristics of a MOSFET. Propery label th...
Question 1 (a) Draw the actual OR the idealized i-v characteristics of a MOSFET. Propery label...
Question 1 (a) Draw the actual OR the idealized i-v characteristics of a MOSFET. Propery label the drawn graph. [4 marks] (b) Name any two types of diodes AND any two types of thyristors. [4 marks] (c) Find the following values for the periodic current output of a diode rectifier with square voltage input and resistive load. The output is shown in the figure below. (i) Average (ii) Root mean square (RMS) (ii) RMS of the 1st harmonic (iv) Total...
ans NO 2 TEE208/05 Question 1 (20 marks) (a) Sketch and label the I-V curves of:...
ans NO 2 TEE208/05 Question 1 (20 marks) (a) Sketch and label the I-V curves of: () a real germanium diode with forward voltage of 0.3V. 4 marks (i) a real sillcon zener diode with zener voltage of 4.7V. [4 marks] 4 marks] List two breakdown mechanisms for a zener diode. (b) (c) Rectifiers convert alternating current (AC) into direct current (DC). () Sketch and label the circuit of a simple half-wave rectifier. [3 marks] (U) Explain two differences between...
1. A 50 Hz 3-phase Have wave uncontrolled rectifier circuit is used to supply a resistive load of...
1. A 50 Hz 3-phase Have wave uncontrolled rectifier circuit is used to supply a resistive load of 100 ohms. The supply is unbalanced and defined as v.-127.28 cos (ot) V 127.28 sin (ot-0.5236) V n63.64 cos (ot+2.0944) V a) Draw the circuit diagram. b) Draw the three phase voltages wave forms. c) Use phasor diagram or any other method to obtain the line voltages v and d) Draw the line voltages v and v wave forms. e) Derive an...
Ctri Question 3 (20 Marks) Lab 1-Zener Circuits and Applications Theory: Zener diode is designed ...
Ctri Question 3 (20 Marks) Lab 1-Zener Circuits and Applications Theory: Zener diode is designed to operate in reverse conduction. Zener breakdown occurs at a precisely defined voltage, allowing the diode to be used as a voltage reference or clipper. While Zener diodes are usually operated in reverse conduction, they may also be operated in cutoff and forward conduction. There are two different effects that are used in "Zener diodes". The only practical difference is that the two types have...
Question 4. (a) A full-wave bridge rectifier power supply is powered from the secondary of a...
Question 4. (a) A full-wave bridge rectifier power supply is powered from the secondary of a transformer which has a rms secondary voltage of 15.6V. The primary of the transformer is connected to a 50Hz, 230VRMS power supply. A 2700uF filter capacitor is used. A current of 1.5 Amp is drawn from the supply. (i) Sketch a schematic diagram of the setup. (ii) Calculate the mean de output voltage. Assume each power diode has a forward voltage drop of 1...
can anyone answer this please with workings [Ec Question 1 Consider the matrix below: T12 6 a) Find A b) What is th...
can anyone answer this please with workings
[Ec Question 1 Consider the matrix below: T12 6 a) Find A b) What is the rank of matrix A? c) If element a became 4, would this change results to parts (a) and (b), and if so, why? Consider these further matrices: B= d) Describe, using matrix terminology, each of the further matrices above (be sure to also describe the dimensions of each matrix). Perform the following matrix operations, where possible, being...
Question 1 (a) Draw the actual OR the idealized i-v characteristics of a MOSFET. Propery label the drawn graph. [4 marks] (b) Name any two types of diodes AND any two types of thyristors. [4 marks] (c) Find the following values for the periodic current output of a diode rectifier with square voltage input and resistive load. The output is shown in the figure below. (i) Average (ii) Root mean square (RMS) (ii) RMS of the 1st harmonic (iv) Total...
ans NO 2 TEE208/05 Question 1 (20 marks) (a) Sketch and label the I-V curves of: () a real germanium diode with forward voltage of 0.3V. 4 marks (i) a real sillcon zener diode with zener voltage of 4.7V. [4 marks] 4 marks] List two breakdown mechanisms for a zener diode. (b) (c) Rectifiers convert alternating current (AC) into direct current (DC). () Sketch and label the circuit of a simple half-wave rectifier. [3 marks] (U) Explain two differences between...
1. A 50 Hz 3-phase Have wave uncontrolled rectifier circuit is used to supply a resistive load of 100 ohms. The supply is unbalanced and defined as v.-127.28 cos (ot) V 127.28 sin (ot-0.5236) V n63.64 cos (ot+2.0944) V a) Draw the circuit diagram. b) Draw the three phase voltages wave forms. c) Use phasor diagram or any other method to obtain the line voltages v and d) Draw the line voltages v and v wave forms. e) Derive an...
Ctri Question 3 (20 Marks) Lab 1-Zener Circuits and Applications Theory: Zener diode is designed to operate in reverse conduction. Zener breakdown occurs at a precisely defined voltage, allowing the diode to be used as a voltage reference or clipper. While Zener diodes are usually operated in reverse conduction, they may also be operated in cutoff and forward conduction. There are two different effects that are used in "Zener diodes". The only practical difference is that the two types have...
Question 4. (a) A full-wave bridge rectifier power supply is powered from the secondary of a transformer which has a rms secondary voltage of 15.6V. The primary of the transformer is connected to a 50Hz, 230VRMS power supply. A 2700uF filter capacitor is used. A current of 1.5 Amp is drawn from the supply. (i) Sketch a schematic diagram of the setup. (ii) Calculate the mean de output voltage. Assume each power diode has a forward voltage drop of 1...
can anyone answer this please with workings
[Ec Question 1 Consider the matrix below: T12 6 a) Find A b) What is the rank of matrix A? c) If element a became 4, would this change results to parts (a) and (b), and if so, why? Consider these further matrices: B= d) Describe, using matrix terminology, each of the further matrices above (be sure to also describe the dimensions of each matrix). Perform the following matrix operations, where possible, being...
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