Electronics Flashcards
(17 cards)
What are the two most commonly used semiconductor elements?
Silicon and germanium
Semiconductors have how many valence electrons?
4
The atoms of purified semiconductor materials arrange themselves into a unique pattern is know as?
Crystal-lattice structure
Adjacent semiconductor atoms tent to share their valence electrons to create a stable eight-electron arrangement. This is know as?
Covalent bonding
The atoms of the impurity are injected into the crystal through a process known as.
Doping
Semiconductor materials have a negative temperature coefficient of resistance, this means as the temperature ____________ the resistance _______________.
Increases and decreases.
Silicon diode has a voltage drop of?
0.7 volts
Germanium diodes have a voltage drop of?
0.3 volts
P = \_\_\_\_\_\_\_\_\_\_\_\_ N = \_\_\_\_\_\_\_\_\_\_\_\_
P = anode N = cathode
For a diode to conduct it must be?
Forward-biased
Conventional current flow is?
Positive holes leave the battery and flow from positive to negative.
For current to flow through the diode you must connect the anode to the ___________ side of the circuit potential, and the cathode to the ____________ side.
Positive and negative sides
The small charge at the junction of a PN diode is called a
Barrier potential
What is it called when a diode is connected across an inductive DC load such so as to prevent arcing during switching operations.
Freewheeling
A regulated voltage this is maintained across the Zener diode when it operates with reverse bias is called?
Zener voltage
the PIV rating of the light-emitting diode is approximately?
6 volts maximum
To emit light, LED’s operate in?
Forward bias
