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
Show Answer
22. One of the key characteristics of an instrumentation amplifier is high input impedance.
  • TRUE
  • FALSE
Show Answer
23. Instrumentation amplifiers are commonly used in environments with high common-mode noise.
  • TRUE
  • FALSE
Show Answer
24. A constant-current source delivers a load current that remains constant only when the load resistance remains constant.
  • TRUE
  • FALSE
Show Answer
25. An OTA is primarily a current-to-voltage amplifier.
  • TRUE
  • FALSE
Show Answer
26. One of the principal areas of application for an isolation amplifier is power plant instrumentation.
  • TRUE
  • FALSE
Show Answer
27. An isolation amplifier provides ac isolation between input and output.
  • TRUE
  • FALSE
Show Answer
28. The main purpose of an instrumentation amplifier is to amplify small signals riding on large common-mode voltages.
  • TRUE
  • FALSE
Show Answer
29. In an isolation amplifier, the third op-amp is used as a unity-gain differential amplifier.
  • TRUE
  • FALSE
Show Answer
30. To construct an instrumentation amplifier, two op-amps and seven resistors are needed.
  • TRUE
  • FALSE
Show Answer
Electronics
Questions and Answers for Competitive Exams Various Entrance Test