Podcast
Questions and Answers
At what forward bias voltage does conduction begin in a silicon junction diode?
At what forward bias voltage does conduction begin in a silicon junction diode?
What is the typical leakage current for a silicon diode under reverse bias conditions?
What is the typical leakage current for a silicon diode under reverse bias conditions?
Which characteristic indicates that conduction occurs at a lower forward bias in germanium diodes compared to silicon diodes?
Which characteristic indicates that conduction occurs at a lower forward bias in germanium diodes compared to silicon diodes?
Which symbol is used to indicate the cathode of a diode?
Which symbol is used to indicate the cathode of a diode?
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What is the primary purpose of considering diode parameters when selecting a diode?
What is the primary purpose of considering diode parameters when selecting a diode?
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What type of diode package is noted for potentially allowing a diode symbol to be printed directly on its casing?
What type of diode package is noted for potentially allowing a diode symbol to be printed directly on its casing?
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What is one key difference between silicon and germanium diodes regarding their reverse leakage current?
What is one key difference between silicon and germanium diodes regarding their reverse leakage current?
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Which of the following is true about the diode symbol without a surrounding circle?
Which of the following is true about the diode symbol without a surrounding circle?
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What type of current is produced by the majority carriers in a P-type semiconductor?
What type of current is produced by the majority carriers in a P-type semiconductor?
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Which semiconductor material typically produces less leakage current?
Which semiconductor material typically produces less leakage current?
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What happens to the minority carriers or leakage current as temperature increases?
What happens to the minority carriers or leakage current as temperature increases?
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When a diode is forward biased, what direction do the majority and minority carriers flow?
When a diode is forward biased, what direction do the majority and minority carriers flow?
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What are the main defining characteristics of a junction diode?
What are the main defining characteristics of a junction diode?
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Which of the following best describes the function of majority carriers in a semiconductor?
Which of the following best describes the function of majority carriers in a semiconductor?
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In the context of semiconductors, what does the term 'leakage current' refer to?
In the context of semiconductors, what does the term 'leakage current' refer to?
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Why might silicon be chosen over germanium for certain semiconductor applications?
Why might silicon be chosen over germanium for certain semiconductor applications?
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What is the primary function of a diode in electronic circuits?
What is the primary function of a diode in electronic circuits?
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Which of the following parameters signifies a diode's ability to conduct current when forward-biased?
Which of the following parameters signifies a diode's ability to conduct current when forward-biased?
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What defines the reverse leakage current in a diode?
What defines the reverse leakage current in a diode?
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What is a main characteristic of silicon diodes compared to germanium diodes?
What is a main characteristic of silicon diodes compared to germanium diodes?
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Which diode package type typically offers the best thermal dissipation?
Which diode package type typically offers the best thermal dissipation?
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What does the symbol 'D' commonly represent in circuit diagrams?
What does the symbol 'D' commonly represent in circuit diagrams?
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Which characteristic is typically NOT used when defining the parameters of a diode?
Which characteristic is typically NOT used when defining the parameters of a diode?
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In a diode, what occurs during forward bias?
In a diode, what occurs during forward bias?
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What is the typical forward voltage drop of a silicon diode?
What is the typical forward voltage drop of a silicon diode?
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Which diode is most commonly used for voltage regulation in circuits?
Which diode is most commonly used for voltage regulation in circuits?
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What is the effect of temperature on the performance of a germanium diode?
What is the effect of temperature on the performance of a germanium diode?
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What component is indicated by the diode symbol with a vertical line and triangle pointing to it?
What component is indicated by the diode symbol with a vertical line and triangle pointing to it?
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Which of the following is true about reverse-biased diodes?
Which of the following is true about reverse-biased diodes?
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What type of diode packaging provides the smallest footprint for surface-mount applications?
What type of diode packaging provides the smallest footprint for surface-mount applications?
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Study Notes
Basic Electronic Fundamentals
- The copyright for the technical training notes belongs to Air Service Training (Engineering) Limited (AST).
- Copying, storing, transmission of the notes, and their use for teaching by other establishments is forbidden without written permission from AST's Accountable Manager.
- Contact details of the accountable manager and email address are available within the supplied documentation.
- The document is for guidance, self-study, and to assist students in assimilating classroom and workshop lessons.
- It does not constitute an authorized document for aircraft maintenance.
- The notes have been updated to comply with CAA and EASA post-regulation 2023/989.
- No content from previous regulations has been removed.
- Students will be assessed on the relevant syllabus for each authority separately.
Module 4: Basic Electronics
- The aim of this module is to introduce basic electronic concepts and provide an understanding of the components listed in the objectives.
Objectives
-
Section 1: Diodes
- Describe diode symbols
- Describe diode characteristics and properties
- Describe diodes in series and parallel
- Describe rectifier diode characteristics and use
- Describe varistor diode characteristics and use
- Describe silicon controlled rectifier characteristics and use
- Describe light emitting diode characteristics and use
- Describe photo-conducting diode characteristics and use
- Describe functional testing of diodes
-
Section 2: Transistors
- Describe transistor symbols.
- Describe component description and orientation
- Describe transistor characteristics and properties.
-
Section 3: Integrated Circuits
- Describe and explain the operation of logic circuits.
- Describe and explain the operation of linear circuits.
- Describe and explain the operation of operational amplifiers
-
Section 4: Printed Circuit Boards
- Describe printed circuit boards.
- Explain the use of printed circuit boards
-
Section 5: Servo Mechanisms
- Describe open loop systems
- Describe closed loop systems
- Describe feedback and follow up concepts
- Describe analogue transducers
- Describe torque synchros
- Describe control synchros
- Describe differential synchros
- Describe transformer synchros
- Describe capacitance transducers
- Describe inductance transducers
- Describe transmitter/receiver synchros
- A glossary of acronyms and their corresponding definitions is included. (Refer to page 9)
Chapter 1: Diodes
-
Section 1: General Diodes
- Introduction to Diodes and their one-way current flow characteristics
- Semiconductor Diode Atomic Structure and Doping
- Donor and Acceptor impurities
- P-type and N-type semiconductors
- Forward and Reverse Bias
- Diode Parameters (PIV, Maximum Forward Current, Temperature, Frequency, Leakage Current, Power Dissipation)
-
Section 2: Junction Diodes
- Introduction to Junction Diodes
- Diode symbols
- Diode component package types illustrated
-
Section 3: Rectifier Diode -Introduction to Half Wave Rectification
- Explanation of Half Wave Rectification and the addition of a capacitor
- Introduction to Full Wave Rectification (bridge rectifier)
Additional Chapters:
- The content continues with chapters covering further electronics topics. (Refer to pages 12-53 )
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on the characteristics and parameters of silicon and germanium diodes. This quiz covers topics such as forward bias voltage, leakage current, and diode symbols. Get ready to explore the critical aspects of diode selection and packaging.
