Transistor and amplifiers
A(n) ____ point is the point on a frequency-response curve where the power output is one-half the maximum value.
half-power
____ is the process of setting the input impedance of a load equal to the output impedance of a signal source.
impedance matching
A(n) ____ transistor tester is used to quickly determine whether a transistor is still operating without removing it from a circuit.
in-circuit
____ is the loading effect an amplifier presents to an incoming signal.
input impedance
The three types of transistor testers are the in-circuit, field-service, and ____ transistor testers.
laboratory-standard
A(n) ____ amplifier is an amplifier that increases and maintains an exact duplicate of an input signal.
linear
____ data can be used to specify the dimensions and pin layout of transistors when designing a PC board using design software.
mechanical
A typical specification sheet for a transistor includes maximum ratings and ____.
mechanical data, heat sinking information, and characteristic curves
In the audio industry ____ are measured by the number of decibels they are below the level of the desired sound.
noise levels
A common-emitter amplifier schematic and its corresponding characteristic curves are used to set the ____ point.
operating point
____ impedance is the loading effect an amplifier presents to another device.
output
A ____ tester is an electric device that tests the electrical characteristics of transistors and diodes.
transistor
Class ____ amplifier operation is located near the lower end of the load line closer to the cutoff condition, and only produces 180* of the input signal.
B
The main classes of operation for an amplifier are designated as A and ____.
B, C, and AB
____ is the range of frequencies over which the gain of an amplifier is maximum and relatively constant.
Bandwidth
____ impedance is a low value and is the input impedance of the common-emitter amplifier.
Base-emitter
Class ____ operation is located closest to cutoff.
C
____ coupling can block or isolate the bias circuits of each amplifier stage.
Capacitive
A(n) ____ amplifier is a series of connected amplifiers in which the output of one amplifier is connected to the input of another amplifier.
Cascade
____ is the ratio of output current to input current.
Current gain
In Class ____ amplifier operation, collector current flows for more than half the input signal but for less than the full input signal.
AB
____ is the ratio of the change in collector current (IC) to the change in emitter current (IE) with a constant collector voltage.
Alpha
____ coupling is the joining of two or more circuits so that power can be transferred from one amplifier stage to another.
Amplifier
Class ____ amplifier operation is well above the cutoff condition for an amplifier.
A
A(n) ____ circuit uses two bipolar transistors and a direct connection without any other type of coupling circuit.
Darlington
____ is the ratio of the amplitude of an output signal to the amplitude of an input signal.
Gain
____ is the ratio of output power to input power.
Power gain
A basic type of transistor amplifier is the common-____.
emitter, base, collector
____ coupling can provide a high level of circuit efficiency; however, the weight, size, and cost rule out this technique for many applications.
Transformer
____ gain is the ratio of output voltage to input voltage.
Voltage
The amplification factor of all common-base amplifier circuits is designated by ____, the current gain.
alpha (a)
Mathematically, ____ is expressed as the difference between upper half-power frequency and lower half-power frequency as shown on a frequency response curve.
bandwidth
A common-____ amplifier is a BJT with both the input and output signals connected to the base.
base
A(n) ____-collector amplifier is a bipolar junction transistor with both the input and output signals connected to the collector.
common
A(n) ____-emitter amplifier is a bipolar junction transistor with both the input and output signals connected to the emitter.
common
The maximum ratings for transistors, as specified in data sheets include voltage and ____.
current, power dissipation, and temperature
The ____ is the point at which all collector current is stopped due to the absence of base current.
cutoff condition
A ____ is a unit of measure used to express the relative intensity of sound.
decibel (dB)
The three basic techniques for coupling amplifier stages together and to loads are capacitive coupling, transformer coupling, and ____ coupling.
direct
____ is any undesirable change in a signal.
distortion
