Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
36 Cards in this Set
- Front
- Back
|
What is a model?
|
An equivalent circuit
|
|
|
What is the approximate input impedance of a 741 opamp?
|
1 Meg Ohm
|
|
|
What is the approximate output impedance of a 741 opamp?
|
75 ohms
|
|
|
When two amplifiers are cascaded, how is the total gain calculated?
|
the two gains are multiplied
|
|
|
What is the output of a transconductance amplifier? Voltage or Current?
|
Current
|
|
|
How many elecrons are in the valence shell of a conductor?
|
1
|
|
|
How many elecrons are in the valence shell of a insulator?
|
8
|
|
|
Which is faster current, electrons or holes?
|
electrons
|
|
|
Which column does the silicon element reside in the periodic table of elements?
|
4
|
|
|
When a single electron is dislodged from its atom, it is called what?
|
a free electron
|
|
|
How many electrons exist in the first orbit of an atom?
|
2
|
|
|
The outer orbit of all elements has a predisposition toward having ____ electrons.
|
8
|
|
|
A pure silicon atom has ____ valence electrons.
|
4
|
|
|
The merging of a free electon with a hole is called _____.
|
recombination
|
|
|
The amount of time between the creation and recombination of a free electron is termed ______.
|
lifetime
|
|
|
What is an intrinsic semiconductor?
|
A pure semiconductor
|
|
|
When a voltage is applied to an intrinsic semiconductor, how does it behave?
|
like a temperature dependant resistor
|
|
|
Free electrons flow in the _____ band. Valence or Conduction?
|
conduction
|
|
|
Holes flow in the valence or conduction band?
|
valence
|
|
|
Extrinsic semiconductors are what?
|
intrinsic semiconductors that has been doped
|
|
|
What are the two methods of doping?
|
diffusion and ion implantation
|
|
|
What are the two types of current movement?
|
diffusion and drift
|
|
|
In a PN junction, when an electron jumps across the barrier and recombines with a hole, it forms two ions called a _______.
|
dipole
|
|
|
When a diode is reverse biased, the small resulting current is caused by what?
|
minority carriers from thermal energy
|
|
|
The large amount of current resulting from a large reverse voltage in a diode is called what?
|
breakdown
|
|
|
Breakdown in a diode is caused by what effect?
|
avalanche
|
|
|
What is the only type of diode operated in the breakdown region?
|
zener diodes
|
|
|
The barrier potential decreases approximately ____ per degree Celcius increase
|
2 mV
|
|
|
For a BJT transistor, the emitter is ____ doped and the base is _____ doped and very ____.
|
heavily, lightly, thin
|
|
|
The current flow through a BJT transistor is due to ____ carrier current flow.
|
minority
|
|
|
What is Beta usually considered to be in a BJT transistor?
|
~100
|
|
|
To increase Beta in a BJT transistor, you must _____ the doping of the emitter and _____ the doping of the base.
|
increase, decrease
|
|
|
Vce must be above ____ for conduction to happen with a BJT transistor.
|
0.2 V
|
|
|
What are the first 3 steps to designing a voltage divider BJT transistor baising circuit?
|
1. Skeleton (form factor)
2. Choose Vre as 1 volt 3. Choose Re |
|
|
The DC input impedance to the base of a BJT transistor is calculated how?
|
Beta x Re
|
|
|
What does power supply compliance mean?
|
The voltage swing it is capable of
|
