Electronic Devices-Special-Purpose Op-Amp Circuits

Electronic Devices-Special-Purpose Op-Amp Circuits
21. An OTA has
  • a bias-current input terminal.
  • high output impedance.
  • no fixed open-loop voltage gain.
  • all of the above
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22. One of the key characteristics of an instrumentation amplifier is high input impedance.
  • TRUE
  • FALSE
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23. Instrumentation amplifiers are commonly used in environments with high common-mode noise.
  • TRUE
  • FALSE
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24. A constant-current source delivers a load current that remains constant only when the load resistance remains constant.
  • TRUE
  • FALSE
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25. An OTA is primarily a current-to-voltage amplifier.
  • TRUE
  • FALSE
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26. One of the principal areas of application for an isolation amplifier is power plant instrumentation.
  • TRUE
  • FALSE
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27. An isolation amplifier provides ac isolation between input and output.
  • TRUE
  • FALSE
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28. The main purpose of an instrumentation amplifier is to amplify small signals riding on large common-mode voltages.
  • TRUE
  • FALSE
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29. In an isolation amplifier, the third op-amp is used as a unity-gain differential amplifier.
  • TRUE
  • FALSE
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30. To construct an instrumentation amplifier, two op-amps and seven resistors are needed.
  • TRUE
  • FALSE
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