Deck 5: Instrumentation Amplifiers and Transmission Lines

Question 1

Which of the following cannot be treated as a requirement of the instrumentation amplifier?

A)Low drift
B)Low input impedance
C)High linearity
D)High CMRR

Answer 1

Low input impedance

Question 2

Amplifier with power supply and output circuits galvanically isolated are called

A)Differential amplifier
B)Isolation amplifier
C)Inverting amplifier
D)None of the mentioned

Answer 2

Isolation amplifier

Question 3

Voltage follower is also known as                        

A)Unity gain amplifier
B)Differential amplifier
C)Comparator
D)None of the mentioned

Answer 3

Unity gain amplifier

Question 4

Which configuration of op-amp is used for filter circuit?

A)Differential
B)Non-inverting
C)Inverting
D)None of the mentioned

Question 5

Amplification of low level signal can be done using                       

A)Electrometer amplifier
B)Difference amplifier
C)Inverting amplifier
D)Non inverting amplifier

Question 6

For an ideal op-amp, zero input results in zero output.

Question 7

Which of the following is not a requirement of transmission lines?

A)Minimum attenuation of signal
B)Should not radiate signal
C)High power signal
D)Less noise

Question 8

What is used between the two lead wires of a parallel transmission line?

A)Plastic
B)Ceramic
C)Metal
D)Wood

Question 9

What is used as a surrounding for the solid center core in a coaxial cable?

A)Plastic dielectric
B)Ceramic
C)Metal
D)Wood

Question 10

For what purpose was twisted pair cable first used?

A)AM
B)Telephone
C)Wi-Fi
D)Digital data transmission

Question 11

What is the type of transmission line in which neither wire is connected to the ground?

A)Unbalanced line
B)Twisted pair cable
C)LAN lines
D)Balanced line

Question 12

What is the phase difference between the current flowing in the two wires of a balanced line?

A)100°
B)180°
C)150°
D)90°

Question 13

In a balanced line, noise is present in the transmission line but cancels at the receiver.

Question 14

What is it called when the noise is present in the transmission line but gets canceled at the receiver?

A)Cancellation mode
B)Common mode cancellation
C)Common mode rejection
D)Rectification

Question 15

Coaxial cables are lines?

A)Balanced
B)Unbalanced
C)LAN
D)Parallel wire

Question 16

What is the device that converts the balanced line to an unbalanced line called?

A)Unbalancer
B)Balancer
C)Balun
D)Equalizer

Question 17

Which filter attenuates any frequency outside the pass band?

A)Band-pass filter
B)Band-reject filter
C)Band-stop filter
D)All of the mentioned

Question 18

Narrow band-pass filters are defined as

A)Q < 10
B)Q = 10
C)Q > 10
D)None of the mentioned

Question 19

Find the center frequency of wide band-pass filter

A)fc= ?(fh ×fL)
B)fc= ?(fh +fL)
C)fc= ?(fh -fL)
D)fc= ?(fh /fL)

Question 20

Find out the voltage gain magnitude equation for the wide band-pass filter.

A)AFt×( f/fL)/?[(1+(f/fh)2]×[1+(f/fL)2].
B)AFt/ ?{[1+(f/fh)2]×[1+(f/fL)2]}
C)AFt/ ?{[1+(f/fh)2]/[1+(f/fL)2]}
D)[AFt/(f/fL)]/ ?{[1+(f/fh)2]/[1+(f/fL)2]}

Question 21

When a second order high pass filter and second order low pass sections are cascaded, the resultant filter is a

A)±80dB/decade band-pass filter
B)±40dB/decade band-pass filter
C)±20dB/ decade band-pass filter
D)None of the mentioned

Question 22

Find the voltage gain magnitude of the wide band-pass filter? Where total pass band gain is=6, input frequency = 750Hz, Low cut-off frequency =200Hz and high cut-off frequency=1khz.

A)13.36 dB
B)12.25 dB
C)11.71 dB
D)14.837dB

Question 23

Compute the quality factor of the wide band-pass filter with high and low cut-off frequencies equal to 950Hz and 250Hz.

A)0.278
B)0.348
C)0.696
D)0.994

Question 24

The details of low pass filter sections are given as fh =10kHz, AF= 2 and f=1.2kHz. Find the voltage gain magnitude of first order wide band-pass filter, if the voltage gain magnitude of high pass filter section is 8.32dB.

A)48.13dB
B)10.02dB
C)14.28dB
D)65.99dB

Question 25

The quality factor of a wide band-pass filter can be

A)12.6
B)9.1
C)14.2
D)10.9