Chapter 3, Section 6,7,8

Question 1

Define the term bias as it is used in an amplifier circuit.

Answer 1

It sets the operating point of a transistor.

Question 2

How can bias applied at the base of the transistor affect the operation of the amplifier?

Answer 2

Affects transistor conduction and amplification.

Question 3

In an amplifier what is the phase from the input to the output?

Answer 3

0 degrees.

Question 4

What is meant by a static operation of an amplifier?

Answer 4

Transistor biasing without input signal.

Question 5

What is considered dynamic amplifier operation?

Answer 5

The amplification of varying input signals.

Question 6

What are the four classes of amplifier operation?

Answer 6

A, B, AB, and C.

Question 7

What are the classes of operation being measured against?

Answer 7

Conduction angles.

Question 8

What type of amplifier is used for impedance matching?

Answer 8

Transformer amplifier.

Question 9

For the impedance matching amplifier, what is the gain?

Answer 9

1.

Question 10

What is meant when a device has a negative temperature coefficient?

Answer 10

Resistance decreases with temperature.

Question 11

What is the problem in an amplifier that develops when the transistor begins to operate at a lower resistance?

Answer 11

Thermal runaway.

Question 12

What does the thermistor do at the base input of the transistor?

Answer 12

Stabilizes the base input current.

Question 13

What is the purpose of installing two diodes on the bias for amplifiers?

Answer 13

Temperature compensation in biasing.

Question 14

Which coupling will pass DC?

Answer 14

Capacitive coupling.

Question 15

What component causes high frequency gain losses in the coupling?

Answer 15

Capacitors.

Question 16

What is the primary purpose of an oscillator?

Answer 16

Generate periodic signals.

Question 17

What are the two stable outputs desired of the oscillator?

Answer 17

Amplitude and Frequency outputs.

Question 18

What component determines the output frequency?

Answer 18

Resonant components.

Question 19

What is the gain of a buffer amplifier?

Answer 19

1.

Question 20

What class of amplifier are frequency multipliers?

Answer 20

Class C amplifiers.

Question 21

What is the property of a crystal that makes them useful in oscillators?

Answer 21

Piezoelectricity, providing stable frequencies.

Question 22

What is the purpose of an electronic filter?

Answer 22

Selectively pass or reject certain frequencies.

Question 23

What are the three circuit configurations of a filter?

Answer 23

Low-pass, high-pass, and band-pass.

Question 24

What electrical components make up the construction of an electronic filter?

Answer 24

Resistors, capacitors, and inductors.