Q.1

The basic instrumentation amplifier has ________ input(s).

  • 1
  • 2
  • capacitive
  • resistive
Q.2

A Schmitt trigger has _________.

  • no trigger points
  • one trigger point
  • two trigger points
  • three trigger points
Q.3

A voltage-to-current converter is used in applications where it's necessary to have an output load current that is controlled by _________.

  • input frequency
  • output resistance
  • input voltage
  • input resistance
Q.4

A Schmitt trigger is a comparator with _______.

  • modulation
  • a closed-loop gain less than one
  • hysteresis
  • a high threshold value
Q.5

The precision rectifier circuit is designed to _________.

  • rectify waveforms with very large voltage swings
  • rectify waveforms with very small voltage swings
  • rectify precision waveforms
  • amplify and rectify waveforms
Q.6

A(n) ________ amplifier is used if the application requires a high sensitivity to low-level signals and protection from high-voltage associated circuits.

  • basic instrumentation
  • operational transconductance
  • log/antilog amplifier
  • isolation
Q.7

The gain of an OTA is the ratio of the output current to the input voltage, and is measured in _____________.

  • amps
  • volts
  • siemens
  • no units
Q.8

An instrumentation amplifier has extremely high ________, good ________, and high ________.

  • input impedance, common-mode rejection, gain
  • noise factor, grounding, power
  • working voltages, current capacity, output impedance
  • output gain, output loading, power
Q.9

The external resistor of a typical instrumentation amplifier is used to set the ________.

  • impedance
  • rejection ratio
  • gain
  • isolation
Q.10

If an operational transconductance amplifier (OTA) is used as an amplitude modulator, the voltage gain is varied by applying a _________ voltage to the ______ input.

  • demodulation, bias
  • modulation, bias
  • bias, modulation
  • low-frequency, bias
Q.11

The ________ amplifier is ideal for amplitude modulation since its gain is current-controlled.

  • log
  • operational transconductance
  • isolation
  • Schmitt
Q.12

Typical isolation amplifiers use optical coupling.

  • True
  • False
Q.13

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

  • the Iout
  • the IBIAS
  • the Vout
  • both Iout and IBIAS
Q.14

OTA stands for Operational Transistor Amplifier.

  • True
  • False
Q.15

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

  • convert dc to high-frequency ac
  • convert dc to low-frequency ac
  • rectify high-frequency ac to dc
  • produce dual-polarity dc voltages for the input to the demodulator
Q.16

An isolation amplifier provides ac isolation between input and output.

  • True
  • False
Q.17

The main purpose of an instrumentation amplifier is to amplify small signals riding on large common-mode voltages.

  • True
  • False
Q.18

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

  • first stage
  • second stage
  • mismatched resistors
  • output op-amp
Q.19

Isolation amps are named as such because they are sealed for protection from outside environmental damage.

  • True
  • False
Q.20

One of the principal areas of application for an isolation amplifier is power plant instrumentation.

  • False
  • True
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