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Mixed Quiz
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1A simple voltage regulator can be built with a tunnel diode.
A)True
B)False


2The two types of linear regulators are the shunt type and the parallel type.
A)True
B)False


3Load regulation indicates how much the load voltage changes when the load changes.
A)True
B)False


4With the shunt type linear regulator, the regulating device is in parallel with the load.
A)True
B)False


5An advantage of series regulators is that they have built-in short-circuit protection.
A)True
B)False


6Efficiency is equal to output power divided by input power and then multiplied by 100%.
A)True
B)False


7One disadvantage of a switching regulator is that it is the most complicated regulator to design and build.
A)True
B)False


8The headroom voltage is defined as the sum of the input and output voltage.
A)True
B)False


9Thermal shutdown means an IC regulator will shut itself off when the internal temperature increases above a certain level.
A)True
B)False


10By using a voltage between the power supply and the load, line and load regulation can be improved significantly.


11A regulator is the most efficient of all voltage regulators with full-load efficiency from about 75 to more than 95 percent.


12An IC that contains a positive and a negative regulator in a single IC package is a regulator.


13One approach to get more load current when using an IC voltage regulator is to use a current .


14Dc-to-dc converters are usually called regulators.


15A basic topology for switching regulators that always produce a negative output voltage when driven by a positive input voltage is the regulator.


16A zener diode is a regulator.


17The transistor of a series voltage regulator is called a transistor.


18Since the ripple rejection of an IC voltage regulator is high
A)only LC filters are needed
B)LC filters are not needed
C)regulation is reduced
D)output voltage is minimum


19How does using an outboard transistor affect the efficiency of a series regulator?
A)reduces it considerably
B)increases it slightly
C)increases it considerably
D)has no effect


20What is the output pin found on some monolithic boost regulators called that provides a low impedance buffer and produces a rectangular output signal?
A)constant current pump
B)function generator
C)buffer generator
D)charge pump


21The term that expresses how much the load voltage changes when the load current changes is the
A)load regulation
B)line regulation
C)output regulation
D)output resistance


22Which of the following is the most efficient voltage regulator?
A)shunt
B)series
C)switching
D)buck


23To protect against an accidental short, a series regulator usually includes
A)short-circuit protection
B)a slow-blow fuse
C)some form of current limiting
D)a varistor


24Aside from two optional bypass capacitors, three-terminal IC voltage regulators require what other external components?
A)resistors
B)coupling capacitors
C)outboard transistors
D)none


25What is the term that means each circuit board has its own three-terminal regulator to supply the voltage used by components on that circuit board?
A)on-card regulation
B)line regulation
C)load regulation
D)single regulation





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