Floyd Self-test in Special-Purpose Op-Amp Circuits

(Last Updated On: December 8, 2017)

Floyd Self-test in Chapter 14 of Electronic Devices

This is the Self-test in Chapter 14: Special-Purpose Op-Amp Circuits from the book Electronic Devices Conventional Current Version, 9th edition by Thomas L. Floyd. If you are looking for a reviewer in Electronics Engineering this will definitely help you before taking the Board Exam.

Floyd Self-test Chapter 14 Topic Outline

  • Floyd Self-test in Instrumentation Amplifiers
  • Floyd Self-test in Isolation Amplifiers
  • Floyd Self-test in Operational Transconductance Amplifiers (OTAs)
  • Floyd Self-test in Log and Antilog Amplifiers
  • Floyd Self-test in Converters and Other Op-Amp Circuits

Start Practice Exam Test Questions

Choose the letter of the best answer in each questions.

1. To make a basic instrumentation amplifier, it takes

  • (a) one op-amp with a certain feedback arrangement
  • (b) two op-amps and seven resistors
  • (c) three op-amps and seven capacitors
  • (d) three op-amps and seven resistors

2. Typically, an instrumentation amplifier has an external resistor used for

  • (a) establishing the input impedance
  • (b) setting the voltage gain
  • (c) setting the current gain
  • (d) interfacing with an instrument

3. Instrumentation amplifiers are used primarily in

  • (a) high-noise environments
  • (b) medical equipment
  • (c) test instruments
  • (d) filter circuits

4. Isolation amplifiers are used primarily in

  • (a) remote, isolated locations
  • (b) systems that isolate a single signal from many different signals
  • (c) applications where there are high voltages and sensitive equipment
  • (d) applications where human safety is a concern
  • (e) answers (c) and (d)

5. The two parts of a basic isolation amplifier are

  • (a) amplifier and filter
  • (b) input stage and coupling stage
  • (c) input stage and output stage
  • (d) gain stage and offset stage

6. The stages of many isolation amplifiers are connected by

  • (a) copper strips
  • (b) a capacitor
  • (c) microwave links
  • (d) current loops

7. The characteristic that allows an isolation amplifier to amplify small signal voltages in the presence of much greater noise voltages is its

  • (a) CMRR
  • (b) high gain
  • (c) high input impedance
  • (d) magnetic coupling between input and output

8. The term OTA means

  • (a) operational transistor amplifier
  • (b) operational transformer amplifier
  • (c) operational transconductance amplifier
  • (d) output transducer amplifier

9. In an OTA, the transconductance is controlled by

  • (a) the dc supply voltage
  • (b) the input signal voltage
  • (c) the manufacturing process
  • (d) a bias current

10. The voltage gain of an OTA circuit is set by

  • (a) a feedback resistor
  • (b) the transconductance only
  • (c) the transconductance and the load resistor
  • (d) the bias current and supply voltage

11. An OTA is basically a

  • (a) voltage-to-current amplifier
  • (b) current-to-voltage amplifier
  • (c) current-to-current amplifier
  • (d) voltage-to-voltage amplifier

12. The operation of a logarithmic amplifier is based on

  • (a) the nonlinear operation of an op-amp
  • (b) the logarithmic characteristic of a pn junction
  • (c) the reverse breakdown characteristic of a pn junction
  • (d) the logarithmic charge and discharge of an RC circuit

13. If the input to a log amplifier is x, the output is proportional to

  • (a) ex
  • (b) ln x
  • (c) log10 x
  • (d) 2.3 log10x
  • (e) answers (a) and (c)
  • (f ) answers (b) and (d)

14. If the input to an antilog amplifier is x, the output is proportional to

  • (a) elnx
  • (b) ex
  • (c) ln x
  • (d) e-x

15. A constant-current source provides a non-changing current to a load

  • (a) for all values of current
  • (b) for all values of load resistance
  • (c) for all values of load resistance within defined limits

16. A peak detector consists of

  • (a) a comparator, a transistor, and a capacitor
  • (b) a comparator, a diode, and a capacitor
  • (c) a comparator, a diode, and an inductor
  • (d) an integrator, a diode, and a capacitor

Complete List of Floyd Self-test in Electronic Devices

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