Diodes Flashcards
What allows LEDs to come in different colours?
Dependent on the what its doped with
What is a P-type semiconductor?
A semiconductor that has more holes than electrons in its junction
What is an N-type semiconductor?
A semiconductor that has more electrons than holes in its junction
How does forward-bias work?
In order to forward bias a P-N junction the P type material is connected to the positive side of
the supply and the N to the negative.
How does reverse-bias work?
In order to reverse bias a P-N junction, the N type material is connected to the positive side of
the supply and the P to the negative.
What are the only two types of faults diodes can have?
- Open Circuit/Open Loop
- Short Circuit
What does SCR stand for?
Silicon Controlled Rectifier
What is the long side of the diode?
Positive
What is the positive side of the diode called?
Anode
What is the short side of the diode?
Negative
What is the negative side of the diode called?
Cathode
What is a triac?
A triac is an electronic component approximately
equivalent to two silicon-controlled rectifiers (SCRs)
joined in inverse parallel (paralleled but with the
polarity reversed) and with their gates connected
together.
What is a diac?
The diac is a two-legged AC device that is used to provide a sharp
precise triggering pulse when the voltage across it reaches a predetermined value
List all common components:
- Diodes (signal, power, zener and light emitting)
- Diacs
- Silicon Controlled Rectifiers (SCR) (Thyristor)
- Triacs (Thyristor)
- Transistors
- Thermistors
- Capacitors
- Inductors
What does BJT stand for?
Bipolar junction transistors
