Slide 1

1. It is a layer of photosensitive material that is first coated in a wafer during photolithographic process.a. maskb. photoresistc. photomateriald. silicon dioxide

2. It is a combination of film and monolithic IC techniques that is being applied to variety of multichip integrated circuits.a. mixtureb. hybridc. combinedd. fusion

3. Thick film employs silk screen techniques in the formation of passive components, what is then the process involve for thin film circuits for the same purpose?a. cathode sputtering techniqueb. anode sputtering techniquec. isolation diffusiond. metallization

4. In IC production, it is the introduction of controlled small quantities of a material into the crystal structure for modification of its electrical characteristicsa. Etchingb. Dopingc. Epitaxial growthd. Diffusion

5. What is the process that is being defined when the metal is bombarded by high velocity inert gas atoms causing some atoms of the metal to be dislodgea. evaporationb. bombardmentc. sputteringd. diffusion

6. An integrated circuit op-amps has___________.a. two inputs and two outputsb. two inputs and one outputc. one input and two outputsd. multiple inputs and one output

7. In the differential mode,a. opposite polarity signals are applied to the inputsb. the gain is 1c. the outputs are differential amplitudesd. only one supply voltage is used

8. The output of a particular op-amp increases 8V in 12s. The slew rate is______.a. 96 V/ sb. 0.67 V/ sc. 1.5 V/ sd. 96 V- s

9. The purpose of offset nulling on operational amplifier is to_______.a. reduce the gainb. equalize the input signalc. zero the output error voltaged. both b and c

10. A voltage follower_______.a. has a gain of 1b. has no feedback resistorc. is non-invertingd. all of these

11. The midrange open loop gain of an op-ampa. extends from the low critical to the upper critical frequencyb. extends from 0 Hz to the upper critical frequencyc. rolls off at 20 dB/decade beginning at 0 Hzd. answers b and c

12. The frequency at which the open loop gain is equal to 1 is calleda. upper critical frequencyb. cut-off frequencyc. notch frequencyd. the unity gain frequency

13. Phase shift in an op-amp is caused by:a. the internal RC circuitsb. the external RC circuitsc. the gain roll offd. the negative feedback

14. Each RC circuit in op-ampa. causes the gain to roll off at -6 dB/octaveb. causes the gain to roll off at -20 dB/decadec. reduces the midrange gain by 3 dBd. both a and b

15. When a negative feedback is applied to an op amp, what will happen to the gain-bandwidth product?a. increasesb. decreasesc. stays the samed. fluctuate

16. If a certain op-map has a mid-range open loop gain of 200 000 and a unity gain frequency of 5 MHz, what is the gain-bandwidth product?a. 200 000 Hzb. 100 000 000 Hzc. 5 000 000 Hzd. 25 Hz

17. In a zero-level detector, the output changes state when the inputa. is positiveb. crosses zeroc. is negatived. has a zero rate of change

18. The zero level detector is one application of a a. comparatorb. summing amplifierc. differentiatord. diode

19. Noise on the input of a comparator can cause the output toa. hang up in one stateb. go to zeroc. change back and forth erratically between two statesd. produced the amplified noise signal

20. A comparator with hysteresisa. has one trgigger pointb. has two trigger pointsc. has a variable trigger pointd. is like a magnetic circuit

21. In a comparator, what is the purpose of output bounding?a. makes it fasterb. keeps the output positivec. limits the output levelsd. stabilizes the output

22. If the voltage gain for each input of a summing amplifier with a 4.7 K feedback resistor is unity, the input resistors must have the value of______.a. 4.7 Kb. 4.7 K divided by the number of inputsc. 4.7 K times the number of inputsd. dependent on the number of inputs

23. An averaging amplifier has five inputs. The ratio of Rf/Ri must bea. 5b. 0.2c. 1d. 0

24. In a scaling adder, the input resistors are:a. all the same valueb. all of different valuesc. each proportional to the weight of its inputd. related by a factor of two

25. In an integrator, the feedback element is aa. resistorb. capacitorc. zener dioded. voltage divider

26. For a step input, the output of the integrator is:a. a pulseb. a triangular waveformc. a spiked. a ramp

27. The rate of change of an integrators output voltage in response to a step input is set by:a. RC time constantb. amplitude of the step inputc. the current through the capacitord. all of these

28. In a differentiator, what is the feedback element is aa. resistorb. inductorc. capacitord. diode

29. The output of a differentiator is proportional toa. the RC time constantb. amplitude of the inputc. the rate at which the input is changingd. both a and b

30. When you apply a triangular waveform to the input of a differentiator, the output isa. a dc levelb. inverted triangular waveformc. square waveformd. first harmonic of the triangular waveform

31. In order to make a basic instrumentation amplifier which is usually used in high noise environment, it takesa. one op-amp with certain feedback arrangementsb. two op-amps and seven resistorc. three op-amps and seven resistord. three op-amps and seven capacitors

32. Typically, an instrumentation amplifier has an external resistor used for:a. establishing the input impedanceb. setting the voltage gainc. setting the current gaind. interfacing with an instrument

33. Operational Transconductance Amplifier (OTA) is basically aa. voltage to current amplifierb. current to voltage amplifierc. current to current amplifierd. voltage to voltage amplifier

34. The operation of a logarithmic amplifier is based ona. nonlinear operation of op-ampb. logarithmic characteristics of pn junctionc. reverse breakdown characteristics of a pn junctiond. logarithmic charge and discharge of RC circuit

35. In op-amps functional block diagram, what follows the differential amplifier?a. cascode amplifierb. complementary amplifierc. level shifterd. high gain amplifier

36. How does the input of the op-amp made high?a. by using super beta transistor at the input differential stageb. by using FETs at the input differential stagec. by connecting a very high resistance in series with the input differential staged. both a and b

37. What type of amplifier is commonly connected at the output stage of the op-amps?a. differential amplifierb. cascade am0plifierc. complementary amplifierd. darlington stage amplifier

38. Why do most operational amplifier uses common collector configuration at the output stage?a. to have a higher output powerb. to have a better frequency responsec. to have a low harmonic distortiond. to have a very low output resistance

39. An operational amplifier has a common-mode voltage gain of 20 and a differential-mode voltage gain of 20 000, calculate the common mode rejection ratio (CMRR).a. 20b. 1 000c. 10 000d. 20 000

40. The approximate value of the bias current compensating resistor in op-amp circuits isa. equal to the feedback resistorb. equal to the input resistorc. equal to the series combination of the input and feedback resistorsd. equal to the parallel combination of the input and feedback resistors

41. In op-amp analysis, the input offset voltage is represented bya. batteryb. signal generatorc. Thevenins voltage sourced. Nortons current source

42. In most Ac amplifiers using op-amps, the feedback resistor is shunted with a very small capacitance, what is its purpose?a. to prevent oscillationb. to improve stabilityc. to minimize high frequency noised. to compensate for high frequency loss

43. 8-PIN pin and SMT are among the most popular op-amp packages. Which among the following corresponds to TO-99?a. metal canb. SMTc. 8-pin DIPd. quadpack

44. What is the package designation of Dual-In-Line package?a. TO-99b. TO-91c. TO-116d. TO-220

45. Which of the following is the unity gain frequency of a 741 op-amp?a. 10 Hzb. 20 KHzc. 1 MHzd. 15 MHz

46. Current cannot flow to the ground througha. mechanical groundb. an ac groundc. a virtual groundd. an ordinary ground

47. The temperature range of operational amplifiers for military use is:a. -80C - 150Cb. -45C - 200Cc. 0C - 70Cd. -55C - 125C

48. An astable multivibrtaor hasa. 1 stable stateb. 2 stable statec. two quasi stable stated. no stable state

49. In bistable multivibrator, speed up or commutating capacitors are used to______.a. to obtain time delayb. to obtain constant output swingc. to make multivibrator state more stabled. to improve resolution time

50. ______is used for counting of binary information.a. clamper circuitb. Schmitt triggerc. bistable vibratord. monostable vibrator

51. _______can be used to delay a circuita. clamper circuitb. Schmitt triggerc. bistable vibratord. monostable vibrator

52. The maximum frequency of the output waveform of a bistable multivibrator ;a. is constant for all multivibratorb. depends upon the maximum frequency of the trigger signalc. is infinityd. is limited by the resolution time of the multivibrator

53. The frequency of the monostable vibrator is_______the frequency of the triggering pulses.a. equal tob. one halfc. twiced. thrice

54. What is the pin number designation of the output of a 555 timer?a. 3b. 4c. 5d. 6

55. Pin number 5 of the 555 timer is the _______.a. supply voltageb. control voltagec. thresholdd.. ground