Flashcards
MECHENG 201 Flashcards
Cards in this deck (12)
- 1Definition of MechatronicsMechatronics is the integration and concurrent design of products and
manufacturing processes utilizing elements of mechanical, electrical &
electronics, and computing and control systems engineering. - 2Definition of “Electronics”A branch of physics that deals with the emission, behaviour, and effects of
electrons (as in electron tubes and transistors) and with electronic devices. - 3What are the different classifications of electronic components?• Active: Rely on or are a source of energy. Include amplifying components.
• Passive: The components that cannot supply energy themselves.
• Electro-mechanic: Can perform electrical operations using moving parts
or electrical connections - 4Examples of Active, Passive and Electro-Mechanic ComponentsActive: Diodes, Transistors, Integrated Circuits, Optoelectronic Devices,
Vacuum Tubes (Valves)
• Passive: Resistors, Capacitors, Magnetic Devices, Transducers, Sensors,
• Electro-mechanic: Piezoelectric Devices, Crystals, Resonators, Switches,
Protection Devices - 5Diode • A two-terminal electronic component that conducts primarily _____ _________.A two-terminal electronic component that conducts primarily in one
direction. - 6What is a mechanical analogous of a Diode?The check valve or a one-way valve is a mechanical valve that normally allows fluid to flow through it in only one direction.
- 7Thermionic Diodes • Electrons from the hot _______ flow towards the positive anode, but not vice versa. • When hot, the cathode releases ______ into the _______, a process called __________ or _________.• Electrons from the hot cathode flow towards the positive anode, but not
vice versa.
• When hot, the cathode releases electrons into the vacuum, a process
called thermionic emission or Edison effect. - 8Diodes - types and symbols
- 9What is a Photodiode?A photodiode is a semiconductor device that absorbs photons and
converts light into an electrical current. - 10Diodes: p-n junction • A p–n junction is a boundary or interface between two types of semiconductor materials, p-type and n-type, inside a single crystal of semiconductor. The "p" (positive) side contains an excess of ____, while the "n" (negative) side contains an excess of _____ in the outer shells of the electrically neutral atoms there. • This allows electrical current to pass through the junction only in one direction.A p–n junction is a boundary or interface between two types of
semiconductor materials, p-type and n-type, inside a single crystal of
semiconductor. The "p" (positive) side contains an excess of holes, while
the "n" (negative) side contains an excess of electrons in the outer shells
of the electrically neutral atoms there.
• This allows electrical current to pass through the junction only in one
direction. - 11Diodes: Zener • Zener diodes are designed to operate in ________________. • Zener diodes can be made to break down at a ____________, and can then be used to provide a __________________.• Zener diodes are designed to operate in the breakdown region.
• Zener diodes can be made to break down at a specified voltage, and can
then be used to provide a regulated output at that voltage. - 12What are the different applications of diodes?Diodes can be used:
• to rectify signals
• to convert alternating current (AC) to direct current (DC)
• to detect AM radio signals
• as a temperature sensor
• as a voltage reference
• to regulate voltage
• to protect circuits from high voltage surges
• to electronically tune radio and TV receivers
• to generate radio-frequency oscillations
• to produce light
• to convert light to energy
• as a switch
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- Flashcards on MECHENG 201 Flashcards, created by Amber Turner on 16/06/2018.
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- Amber Turner
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