electronics-operational-amplifiers Related Question Answers

1. A noninverting closed-loop op-amp circuit generally has a gain factor:





2. In order for an output to swing above and below a zero reference, the op-amp circuit requires:





3. Op-amps used as high- and low-pass filter circuits employ which configuration?





4. Decreasing the gain in the given circuit could be achieved by





5. If ground is applied to the (+) terminal of an inverting op-amp, the (–) terminal will:





6. An astable multivibrator is also known as a:





7. With negative feedback, the returning signal:





8. What starts a free-running multivibrator?





9. A portion of the output that provides circuit stabilization is considered to be:





10. How many leads does the TO-5 metal can package of an operational amplifier have?





11. If a noninverting amplifier has an RIN of 1000 ohms and an RFB of 2.5 kilohms, what is the RIN voltage when 1.42 mV is applied to the correct input?





12. Input impedance [Zin(I)] of an inverting amplifier is approximately equal to:





13. The closed-loop voltage gain of an inverting amplifier equals:





14. What is the cutoff frequency of this low-pass filter?





15. All of the following are basic op-amp input modes of operation EXCEPT





16. What is the output voltage?





17. A circuit whose output is proportional to the difference between the input signals is considered to be which type of amplifier?





18. With negative feedback, the returning signal





19. What is the output waveform?





20. The voltage follower has a:





21. What is the output waveform of the circuit?





22. The ratio between differential gain and common-mode gain is called:





23. What is the frequency of this 555 astable multivibrator?





24. If the gain of a closed-loop inverting amplifier is 3.9, with an input resistor value of 1.6 kilohms, what value of feedback resistor is necessary?





25. In an open-loop op-amp circuit, whenever the inverting input (–) is negative relative to the noninverting input (+), the output will:





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