Diodes Flashcards
A reverse-biased silicon diode is connected in series with a 12 V source and a resistor. The voltage across the resistor is ________.
Since the diode is in reverse bias the voltage is zero.
Generally a silicon diode is in the ________ state if the current established by the applied voltage source is in the direction of the diode symbol’s arrow and VD is greater than or equal to 0.7 V.
On
The small current when a diode is reverse-biased is called _________.
Leakage Current
An electron that absorbs energy and “jumps” from the valence band to the conduction band is said to be in an ______ state.
Excited
In an n-type material, the majority carriers are ________, and the minority carriers are _______.
Electrons, holes
The resistance of a forward-biased diode is _________ above the knee of the curve.
Minimal
How many electrons do pentavalent materials have?
5
In a p-type material, the majority carriers are ________, and the minority carriers are _________.
holes, electrons
When trivalent elements are used in doping, the resulting material is called ________ material and has an excess of ________.
p-type, holes
p-type materials ______ electrons.
accepts
n-type material __________ electrons.
donates
What is doping?
Adding impurity atoms to an intrinsic silicon to increase the semiconductor’s conductivity.
When pentavalent materials are doped the resulting material is called _________ that has excess ___________.
n-type, electrons
When trivalent materials are doped the resulting material is called _____________ that has an excess of _________.
p-type, holes
When a p-n unction is in reverse bias mode the depletion layer is __________ and the device acts as an _____________.
widened, insulator
