VEE 222 Discrete Devices II

Course Description: This course covers the construction and operation of various discrete thyristor power control devices such as Diacs, Triacs, Silicon Controlled Rectifier (SCR), Programmable Unijunction Transistor (PUT) and Unijunction Transitor (UJT) and their circuit configurations.

A. PROGRAM LEARNING OUTCOMES (PLOs):
The student will be able to:

1. Practice safety and occupational health procedures in the workplace.
2. Use electronics tools and test equipment competently.
3. Interpret schematic diagrams and waveforms.
4. Build electronics project to a given specification.

B. STUDENT LEARNING OUTCOMES (SLOs) - GENERAL:
The student will be able to:


1. Describe the purpose and operation of Unijunction Transistor (UJT) and Silicon Controlled Rectifier (SCR).
2. Describe UJT oscillator circuit operation.
3. Describe SCR trigger circuit operation.
4. Describe SCR power control operation
5. Identify the relationship among Triac, SCRs , Diac and four-layered devices.
6. Describe the construction, operation and application of Programmable Unijuction Transistor (PUT).

SLO	PLO1	PLO2	PLO3	PLO4
1	I	DM	D	DM
2	I	DM	D	DM
3	I	DM	D	DM
4	I	DM	D	DM
5	I	DM	D	DM
6	I	DM	D	DM

I = Introduced
D = Demonstrated
M = Mastered

C. STUDENT LEARNING OUTCOMES (SLOs)-SPECIFIC:
The student will be able to:

General SLO 1. Describe the purpose and operation of Unijunction Transistor (UJT) and Silicon Controlled Rectifier (SCR).

Student Learning Outcomes	Assessment Strategies
1.1 Describe the purpose of UJTs.	Competence will be demonstrated through quizzes, written test and practical exam.
1.2 Identify UJTs schematic symbol.
1.3 Describe the operating characteristics of UJTs.and power supplies
1.4 Describe the purpose of SCR.
1.5 Identify SCRs schematic symbol.
1.6 Describe the SCRs rectifier operating characteristics.

General SLO 2. Describe UJT oscillator circuit.

Student Learning Outcomes	Assessment Strategies
2.1 Describe the purpose of UJT.	Competence will be demonstrated through quizzes, written test and practical exam.
2.2 Identify the schematic symbol of UJT.
2.3 Recognize UJT oscillator circuit.
2.4 Describe the operation of UJT oscillator.
2.5 Perform signal test and measurement on UJT oscillator circuit.
2.6 Identify and describe the defective UJT oscillator circuit.

 

General SLO 3. Describe the SCR trigger circuit operation.

Student Learning Outcomes	Assessment Strategies
3.1 Describe the purpose of SCR trigger circuit.	Competence will be demonstrated through oral questioning, written, and practical tests.
3.2 Describe the SCR trigger circuits schematic diagram.
3.3 Identify the SCR trigger circuit parts and operation.
3.4 Measure gate and anode current in an operating SCR circuit.
3.5 Recognize the normal operation of SCR trigger circuit.
3.6 Identify and describe the effect of defective SCR trigger circuit.

General SLO 4. Describe SCR power control operation.

Student Learning Outcomes	Assessment Strategies
4.1 Describe the purpose of SCR power control circuits.	Competence will be demonstrated through oral questioning, written, and practical tests.
4.2 Recognize SCR power control circuit.
4.3 Describe the operation of an SCR power control circuit
4.4 Recognize normal operation of SCR power control circuit.
4.5 Measure the waveforms in an operating SCR control circuit.
4.6 Identify the effect of the defective SCR control circuit.

General SLO 5. Describe the relationship among Triac, SCRs, Diac and four-layer devices.

Student Learning Outcomes	Assessment Strategies
5.1 Describe the relationship between Traics and SCRs.	Competence will be demonstrated through quizzes, written test and practical exam.
5.2 Recognize Triac circuit operation based on input conditions.
5.3 Describe the relationship between Diacs and Four layer Diodes.
5.4 State the advantages of using Diac with a Triac.
5.5 Observe the effect of AC and DC voltages with basic Triac operation.
5.6 Describe the effect of triggering a Triac with an AC waveform.

General SLO 6. Describe the construction, operation and application of programmable unijunction transistor (PUT).

Student Learning Outcomes	Assessment Strategies
6.1 Recognize the PUT schematic symbol.	Competence will be demonstrated through quizzes, written test and practical exam.
6.2 Describe the construction of PUT devices.
6.3 Describe the operation of PUT devices.
6.4 Identify PUT devices application.
6.5 Perform PUT circuit signal test and measurement.
6.6 Describe the effect of defective PUT device in a Circuit.

D. COURSE CONTENTS


1. Purpose and operation of UJT and SCR.
2. UJT oscillator circuit.
3. SCR trigger circuit operation.
4. SCR power control operation.
5. Traic, SCRs, Diac and four-layer devices.
6. PUT construction, operation and application.

E.METHODS OF INSTRUCTION

1. Computer Aided Instruction
2. Practical/Experimentation
3. Lecture/Demonstration

F. REQURIED TEXT(S) AND COURSE MATERIALS
Floyd, T. L. (2001). Electronics Devices. 5th edition. Upper Saddle River, NJ: Prentice Hall (or most recent edition).
Toolbox and electronics circuit kit

G. REFERENCE MATERIALS
Nida Corporation. (2002). Unit III Analog Circuits. Melborne, FL: Nida Corporation Publishing (or most recent edition).

H. INSTRUCTIONAL COSTS
None

I. EVALUATION
Student in electronics program must achieve a grade of "C" or better to pass the course.

J. CREDIT BY EXAMINATION
None