Question 1

In a three-stage amplifier.

Accepted Answer

A)  the noise ratio of the last stage is usually insignificant. 
B)  Friss's formula can be used to determine the overall noise effect of all three stages. 
C)  the noise ratio of all three stages is mainly due to the noise figure of the first stage. 
D)  all of the above 
A)  the noise ratio of the last stage is usually insignificant. 
B)  Friss's formula can be used to determine the overall noise effect of all three stages. 
C)  the noise ratio of all three stages is mainly due to the noise figure of the first stage. 
D)  all of the above

Question 2

Determine the frequency of a Clapp oscillator if L4 = 35 mH and C3 = 20pf.

Accepted Answer

A)  200 kHz 
B)  20 kHz 
C)  1.9 MHz 
D)  190 kHz 
A)  200 kHz 
B)  20 kHz 
C)  1.9 MHz 
D)  190 kHz

Question 3

The device which extracts the information signal from the high frequency carrier in a receiver is called a:

Accepted Answer

A)  demodulator 
B)  transducer 
C)  modulator 
D)  transmitter 
A)  demodulator 
B)  transducer 
C)  modulator 
D)  transmitter

Question 4

Given that a filter has a Q of 50 and a BW of 500 Hz, determine its resonant or center frequency

Accepted Answer

A)  2500 kHz 
B)  100 kHz 
C)  25,000 kHz 
D)  250 kHz 
A)  2500 kHz 
B)  100 kHz 
C)  25,000 kHz 
D)  250 kHz

Question 5

Which is NOT an example of internal noise?

Accepted Answer

A)  Excess noise 
B)  Noise produced by transistors and integrated circuits 
C)  Noise produced by resistors 
D)  Space noise 
A)  Excess noise 
B)  Noise produced by transistors and integrated circuits 
C)  Noise produced by resistors 
D)  Space noise

Question 6

The main requirements that must be met for an oscillator to successfully oscillate are known as:

Accepted Answer

A)  the flywheel effect 
B)  the piezoelectric effect 
C)  Barkhausen criteria 
D)  frequency synthesis 
A)  the flywheel effect 
B)  the piezoelectric effect 
C)  Barkhausen criteria 
D)  frequency synthesis

Question 7

The type of noise that is often produced by spark producing equipment is known as:

Accepted Answer

A)  thermal noise. 
B)  transistor noise. 
C)  man made noise. 
D)  atmospheric noise. 
A)  thermal noise. 
B)  transistor noise. 
C)  man made noise. 
D)  atmospheric noise.

Question 8

A square wave is made up of a summation of:

Accepted Answer

A)  rectangle waves 
B)  ramps 
C)  sinusoids 
D)  pulses 
A)  rectangle waves 
B)  ramps 
C)  sinusoids 
D)  pulses

Question 9

Two types of noise that occur at extremely low and high frequencies in amplifiers containing transistors are known as:

Accepted Answer

A)  Johnson noise and pink noise. 
B)  excess noise and transit time noise. 
C)  flicker noise and shot noise. 
D)  1/f noise and thermal noise. 
A)  Johnson noise and pink noise. 
B)  excess noise and transit time noise. 
C)  flicker noise and shot noise. 
D)  1/f noise and thermal noise.

Question 10

A popular, convenient way of representing noise calculations, mainly involved with microwave receivers, is:

Accepted Answer

A)  Noise figure. 
B)  Equivalent noise resistance. 
C)  SIN ratio. 
D)  Equivalent noise temperature. 
A)  Noise figure. 
B)  Equivalent noise resistance. 
C)  SIN ratio. 
D)  Equivalent noise temperature.

Question 11

Which is NOT a term for noise produced by resistors?

Accepted Answer

A)  Thermal noise 
B)  Shot noise 
C)  Johnson noise 
D)  White noise 
A)  Thermal noise 
B)  Shot noise 
C)  Johnson noise 
D)  White noise

Question 12

Shot noise is directly related to:

Accepted Answer

A)  resistor value 
B)  ac voltage 
C)  Boltzman constant 
D)  dc current 
A)  resistor value 
B)  ac voltage 
C)  Boltzman constant 
D)  dc current

In a three-stage amplifier.

Determine the frequency of a Clapp oscillator if L4 = 35 mH and C3 = 20pf.

The device which extracts the information signal from the high frequency carrier in a receiver is called a:

Given that a filter has a Q of 50 and a BW of 500 Hz, determine its resonant or center frequency

Which is NOT an example of internal noise?

The main requirements that must be met for an oscillator to successfully oscillate are known as:

The type of noise that is often produced by spark producing equipment is known as:

A square wave is made up of a summation of:

Two types of noise that occur at extremely low and high frequencies in amplifiers containing transistors are known as:

A popular, convenient way of representing noise calculations, mainly involved with microwave receivers, is:

Which is NOT a term for noise produced by resistors?

Shot noise is directly related to:

Amplitude Modulation: Transmission

Amplitude Modulation: Reception

Single-Sideband Communications

Frequency Modulation: Transmission

Frequency Modulation: Reception

Communications Techniques

Digital Communications: Coding Techniques

Wired Digital Communications

Wireless Digital Communications

Network Communications

Transmission Lines

Wave Propagation

Antennas

Waveguides and Radar

Microwaves and Lasers

Television

Fiber Optics

Filters

Exam 1: Introductory Topics

In a three-stage amplifier.

Determine the frequency of a Clapp oscillator if L4 = 35 mH and C3 = 20pf.

The device which extracts the information signal from the high frequency carrier in a receiver is called a:

Given that a filter has a Q of 50 and a BW of 500 Hz, determine its resonant or center frequency

Which is NOT an example of internal noise?

The main requirements that must be met for an oscillator to successfully oscillate are known as:

The type of noise that is often produced by spark producing equipment is known as:

A square wave is made up of a summation of:

Two types of noise that occur at extremely low and high frequencies in amplifiers containing transistors are known as:

A popular, convenient way of representing noise calculations, mainly involved with microwave receivers, is:

Which is NOT a term for noise produced by resistors?

Shot noise is directly related to:

Amplitude Modulation: Transmission

Amplitude Modulation: Reception

Single-Sideband Communications

Frequency Modulation: Transmission

Frequency Modulation: Reception

Communications Techniques

Digital Communications: Coding Techniques

Wired Digital Communications

Wireless Digital Communications

Network Communications

Transmission Lines

Wave Propagation

Antennas

Waveguides and Radar

Microwaves and Lasers

Television

Fiber Optics

Filters