Podcast
Questions and Answers
What is the equivalent of the TRIAC?
What is the equivalent of the TRIAC?
- Thyristor
- Difference between PUT and UJT
- SCR (correct)
- DIAC
What is the ratio of RB1 to RBB called in UJT?
What is the ratio of RB1 to RBB called in UJT?
- Base ratio
- Trigger ratio
- Emitter ratio
- Bias ratio (correct)
How many PN junctions do thyristors have?
How many PN junctions do thyristors have?
- 3
- 1
- 2 (correct)
- 4
What is the minimum value of anode current below which it must fall to completely turn off the thyristor?
What is the minimum value of anode current below which it must fall to completely turn off the thyristor?
What is the forward break over voltage?
What is the forward break over voltage?
Flashcards
SCR (Silicon Controlled Rectifier)
SCR (Silicon Controlled Rectifier)
A semiconductor device similar to a TRIAC, but with a single gate.
Bias Ratio (η)
Bias Ratio (η)
The ratio of the resistance of the base 1 resistor (RB1) to the resistance of between base 1 and base 2 (RBB) in a UJT.
Holding Current (IH)
Holding Current (IH)
The minimum value of anode current needed to keep the thyristor turned on. If the current drops below this value, the thyristor turns off.
Forward Breakover Voltage (VBO)
Forward Breakover Voltage (VBO)
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Forward Breakover Voltage (VBO)
Forward Breakover Voltage (VBO)
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Study Notes
Thyristor Equivalents and Characteristics
- The equivalent of TRIAC is a bilateral switch, which can conduct current in both directions.
UJT Components
- The ratio of RB1 to RBB in a Unijunction Transistor (UJT) is called the intrinsic standoff ratio.
Thyristor Structure
- Thyristors have four PN junctions, which are crucial for their operation.
Thyristor Operation
- The minimum value of anode current below which it must fall to completely turn off the thyristor is called the holding current.
Thyristor Voltage Characteristics
- The forward breakover voltage is the voltage at which the thyristor begins to conduct when the gate is triggered.
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Description
Test your knowledge of semiconductor devices and their characteristics with this quiz. Explore topics such as TRIAC, UJT, Shockley diode, thyristors, and SCR triggering mechanisms. Challenge yourself with questions about power delivery, PN junctions, and device functionalities.
