Special-Purpose Op-Amp Circuits

Q1: This circuit is a setup for

A
an antilog amplifier

B
a constant-current source

C
an instrumentation amplifier

D
an isolation amplifier

Q2: The primary function of the oscillator in an isolation amplifier is to

A
convert dc to high-frequency ac

B
convert dc to low-frequency ac

C
rectify high-frequency ac to dc

D
produce dual-polarity dc voltages for the input to the demodulator

Q3: An instrumentation amplifier has a high

A
output impedance

B
power gain

C
CMRR

D
supply voltage

Q4: In the classic three-op-amp instrumentation amplifier, the differential voltage gain is usually produced by the

A
first stage

B
second stage

C
mismatched resistors

D
output op-amp

Q5: Which circuit is known as a voltage-to-current converter?

A
a

B
b

C
c

D
d

Q6: Circuits that shift the dc level of a signal are called

A
limiters

B
clampers

C
peak detectors

D
dc converters

Q7: Which circuit is known as a current-to-voltage converter?

A
a

B
b

C
c

D
d

Q8: Refer the given circuits. Which circuit is known as an OTA?

A
a

B
b

C
c

D
d

Q9: mcq20_1008_1.jpg
Refer to Figure 20-2. This circuit is a setup for

A
an antilog amplifier

B
a constant-current source

C
an instrumentation amplifier

D
an isolation amplifier

Q10: This circuit is a setup for

A
an antilog amplifier

B
a constant-current source

C
an instrumentation amplifier

D
an isolation amplifier

Q11: When using an OTA in a Schmitt-trigger configuration, the trigger points are controlled by

A
the Iout

B
the IBIAS

C
the Vout

D
both Iout and IBIAS

Q12: The voltage gain of an OTA can be calculated using the formula

A
mca20_1002a1.gif

B
mca20_1002b1.gif

C
mca20_1002c1.gif

D
mca20_1002d1.gif


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