Solid State Flashcards
(22 cards)
What happens when arsenic is added to pure silicon?
Silicon becomes N Type material
Two most common Semi Conductors?
Silicon and Germanium
How many valence electrons does a pure semiconductor material have?
4
Current carrier in P-Type
Holes
Doping with arsenic, phosphorous or antimony results in
N-Type Material
What happens to Pure Silicon at Room Temperature
will have some electrons freed to the conduction band from the heat
What does it mean if a semiconductor material is extrinsic?
An impurity has been added to the pure material
What occurs when gallium is added to pure silicon?
P-type Material is formed
Current flow in intrinsic silicon
is much less than extrinsic silicon
What happens when pure Silicon is doped with Indiu
P-type material if formed
When diffusion occurs in a semi-conductor material the __________________ is formed in the area between the P and N material
Depletion Region
When we use the term “bias” what are we referring to
Voltage applied to control operation of a device
Thermal runaway in a diod?
Destroys Diode
Varactor Diode?
Tuning in a Resonant Circuit
Zener Diode?
Stabilize or Regulate Voltage
When a diode is first formed, an interaction occurs where the electrons move from the “N” type material across the junction to fill holes in the “P” material. What is this process called?
Diffusion
Light Emitting Diode?
emit light when electrical energy is applied to it
A diode conducts current freely in one direction and opposes current in the opposite direction
True or False?
What does a half wave rectifier do that a full wave doesn’t
produces a pulse of DC for every input cycle
What is one disadvantage of the full wave rectifier?
The output voltage is half the input voltage
At a given moment in the operation of an NPN transistor
electrons move across the forward biased emitter-base junction and into the base region
For normal operation of a PNP transistor, how does the base need to be biased?
Negative with respect to the emitter
