1. If the signal power delivered to load is 5 watts and the electric power supply to the output circuit is 10 watts, calculate the collector circuit efficiency?
Answer
Correct Answer:
50%
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2. What is the value of the voltage difference existing between the two logic levels of an emitter coupled logic?
Answer
Correct Answer:
800 milli volts
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3. How many dots can be generated in a character matrix of a character waveform at a given instant?
Answer
Correct Answer:
1
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4. What is the range of the resistance of a thin film resistor?
Answer
Correct Answer:
20Ώ to 50K
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5. In an integrated circuit, what number of gates on a chip is considered a small scale integration?
Answer
Correct Answer:
Less than 12 gates
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6. If a person wants to read or write 20 words of 10 bits each, how many storage cells will be used?
Answer
Correct Answer:
200
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7. In which among the following is the masking and etching process used to make an opening in the p- type region?
Answer
Correct Answer:
Emitter diffusion
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8. Which among the following applications of a counter is related to the transmission and reflection of a pulse over a period of time?
Answer
Correct Answer:
Measurement of distance
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9. A 4 bit adder requires a ______ pin package.
Answer
Correct Answer:
16
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10. What is a flip flop?
Answer
Correct Answer:
A feedback combination in which the output of a single input NAND gate is connected to the input of the other gate
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11. The television tube is an example of a_______.
Answer
Correct Answer:
voltage to current convertor
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12. How many layers of material are there in the basic structure of an integrated circuit?
Answer
Correct Answer:
4
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13. Which application of a read only memory is used when an address is changed by means of a counter?
Answer
Correct Answer:
Sequence generator
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14. In an ideal operational amplifier, the value of input resistance R is equal to _______.
Answer
Correct Answer:
∞
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15. The weight of the most significant bit (MSB) is:
Answer
Correct Answer:
half the stable reference voltage.
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16. In which among the following classes of amplifiers does the current flow all the time in the output circuit? Answers:
Answer
Correct Answer:
Cass A
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17.
Which among the given options, in the above image, is the 'diffusion law equation' where N is the amount of substance, t is time, D is diffusion coefficient, X is the position or length?
N is the amount of substance,
t is time,
D is diffusion coefficient,
X is the position or length?
Answer
Correct Answer:
A
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18. How many leads are there in a dual in line package of an integrated circuit?
Answer
Correct Answer:
14
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19. The time during which the anode voltage should be kept below the maintaining voltage till a critical value is achieved is known as the:
Answer
Correct Answer:
gate recovery time.
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20. In which among the following types of circuits is it possible to fabricate PNP and NPN transistors within the same Silicon substrate?
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21. In which among the following waveform generators is the circuit referred to as
Answer
Correct Answer:
A pulse generator
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22. Which among the following methods of compensation introduces Phase lag into the amplifier?
Answer
Correct Answer:
Dominant pole compensation
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23. Which among the following is a characteristic of programmable attenuator?
Answer
Correct Answer:
The output depends upon the binary word.
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24. What is the slew rate in a monolithic operational amplifier?
Answer
Correct Answer:
1 volt per micro second
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25. Which among the above diagram is an unblinking waveform for a character generator
Answer
Correct Answer:
D
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26. Which among the following is correct of an 'Encoder'?
Answer
Correct Answer:
Only one of the inputs is in state 1. It generates an N-bit code.
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27. Which of the following techniques consists of manufacturing unit cells?
Answer
Correct Answer:
Discretionary wiring
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28. A 3-db frequency is the one in which:
Answer
Correct Answer:
resistance is equal to the capacitive reactance.
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29. The p- type substrate of an integrated circuit has a resistivity of:
Answer
Correct Answer:
10 ohmic centimeters
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30. What is the value of the lower base emitter breakdown voltage?
Answer
Correct Answer:
~7 volts
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31. If the analog voltage in an analog to digital converter is 4 volts, how many pulses will it generate?
Answer
Correct Answer:
4
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32. Which type of transistor construction techniques consists of forming both the emitter and the collector junction by subjecting a semi-conductor to gaseous n- type and p- type impurities?
Answer
Correct Answer:
Diffusion type construction
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33. The resistivity of a conductor in an integrated circuit is 10 ohms meter and the thickness of the conductor is 10 meters. Calculate the resistance of the conductor?
Answer
Correct Answer:
1 ohm
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34. If the transition of a binary is made from state 0 to 1, the output makes a transition from state 1 to 0. This is a characteristic of_______.
Answer
Correct Answer:
up-down counter
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35. In a ladder type D/A converter, _______
Answer
Correct Answer:
twice the number of resistances is equal to the number of bits.
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36. Which amplifier has infinite input and output resistance?
Answer
Correct Answer:
Voltage amplifier
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37. The region of the transistor of an integrated circuit in which both the emitter and the collector junctions are forward biased is known as the:
Answer
Correct Answer:
saturation region.
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38. The decoder in an MOS-ROM contains:
Answer
Correct Answer:
NAND gates which are static.
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39. How is a storage cell identified in the coincident selection method of random access memory?
Answer
Correct Answer:
From the value of the point where X lines and Y lines intersect
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40. For a band reject filter:
Answer
Correct Answer:
the cut off frequency of a low pass section is smaller than the cut off frequency of a high pass section.
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41. What does the bottom layer in an integrated circuit consist of?
Answer
Correct Answer:
p- type silicon
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42. In isolation diffusion, _______
Answer
Correct Answer:
p- type impurities penetrate the n- type epitaxial layer
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43. If a 256 bit read only memory is arranged in 40 words of 10 bits each, how many emitters along with the encoder does it consist of?
Answer
Correct Answer:
32
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44. The input resistance of an AC voltage follower is ___________.
Answer
Correct Answer:
12 M at 100 Hz
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45. Which among the following is not a characteristic of MOS circuits?
Answer
Correct Answer:
High power consumption
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46. Which among the following shift registers is used to perform multiplication or division by multiples of 2?
Answer
Correct Answer:
A right shift, left shift register
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47. Which among the following shift registers is DC stable and is able to work without a minimum clock rate?
Answer
Correct Answer:
Static MOS shift register
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48. Which among the following is not an element of medium scale integration?
Answer
Correct Answer:
Read only memories
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49. Which among the following is a parallel plate capacitor?
Answer
Correct Answer:
Thin film capacitor
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50. The phase of a sinusoidal input voltage undergoes a phase shift from_______.
Answer
Correct Answer:
0° to 360°
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51.
The quiescent value Ic is equal to_______
Here Im ispeak sinusoidal current.
Answer
Correct Answer:
Im / √2
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52. What is the correct expression for the common mode rejection ratio where
Answer
Correct Answer:
Vd / Vc
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53. What is the conduction angle?
Answer
Correct Answer:
The duration for which the silicon controlled rectifier is on
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54. Which among the following is a characteristic of 'ratio less' powerless circuits?
Answer
Correct Answer:
All the devices are of minimum geometry. The output is independent of the ratio of resistance.
Note: This question has more than 1 correct answers
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55. Parasitic capacitance is:
Answer
Correct Answer:
the sum of the capacitance from the bottom of the n- type region and the sidewalls of the isolation islands to the p+ region.
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56. Which among the following is the correct expression for the 'voltage gain' of a transistor?
Answer
Correct Answer:
Output voltage / Input voltage
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57. The above diagram represents a _______.
Answer
Correct Answer:
1 bit memory
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58. If the input to an operational amplifier comparator is a sine wave, the output will be a ___________
Answer
Correct Answer:
square wave with positive and negative pulses.
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59. In a register, the n number of flip flops can store_______.
Answer
Correct Answer:
n- bit words
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60. Which among the following flip flops changes the state of an output with each clock pulse just like a toggle switch?
Answer
Correct Answer:
T flip flop
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61. When a bit 1 is present on the MSB line, _______
Answer
Correct Answer:
the single pole double throw switch (SPDT) connects the resistor to the reference voltage. the analog voltage becomes proportional to the digital input.
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62.
Which among the following is the correct function for the low 3-db frequency where
R is the resistor and
C is the capacitor
Answer
Correct Answer:
1 / 2π RC
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63. In a paraphase amplifier, _______
Answer
Correct Answer:
2 outputs are equal in magnitude but opposite in a phase.
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64. Which among the following types of RAM uses a three device information storage cell on the parasitic gate?
Answer
Correct Answer:
Dynamic MOSRAM
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65. What is the second stage of an integrated operational amplifier?
Answer
Correct Answer:
Differential amplifier with a single ended output
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66. Which among the following transistors is used only if its collector is at a fixed negative voltage?
Answer
Correct Answer:
Vertical PNP transistors
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67. In a Schottky transistor, what is the value of the base to the collector voltage?
Answer
Correct Answer:
0.4 volt
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68. A digital system to know whether the sum of binary bits in a particular word is even or odd is known as_______.
Answer
Correct Answer:
parity checker
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69. What does the above symbol represent?
Answer
Correct Answer:
Half binary adder
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70. Which type of distortion results from new frequency in the output which is not present at the input signal?
Answer
Correct Answer:
Non-linear distortion
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71. If in the above diagram, the binary coded decimal's input is 0101, and 0 for any other input, what will be its output? Answers:
Answer
Correct Answer:
1
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72. In a 'race around' condition of an integrated circuit, _______
Answer
Correct Answer:
the clocked pulse train will be equal to 1. the output will oscillate between 0 and 1.
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73. Which among the following networks has two inputs and gives an output which is proportional to the difference between the signals at the two inputs?
Answer
Correct Answer:
Mixer network
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74.
A 'twisted ring counter' is_______
where N represents a clock pulse.
Answer
Correct Answer:
a 2N:1 scalar
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75. The time required for the collector current to rise to a value of 10% of its maximum is known as:
Answer
Correct Answer:
delay time.
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76. In an integrated circuit, how many outputs does an OR gate have?
Answer
Correct Answer:
1
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77. If the MOSFET has a thin oxide gate,
Answer
Correct Answer:
its threshold voltage is low.
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78. A ___________ is used to compensate for the distortion of the digital data pulses transmitted over telephone wires.
Answer
Correct Answer:
delay equalizer
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79. A silicon controlled switch (SCS) operates at _______
Answer
Correct Answer:
low current and low voltage.
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80. __________ is the ratio of change of input offset voltage to the variations in temperature.
Answer
Correct Answer:
Input offset voltage drift
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81. According to Moore's Law the amount of transistors able to fit on one chip doubles every how often?
Answer
Correct Answer:
1 year
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82. What is an advantage of using active filters instead of passive in a monolithic IC?
Answer
Correct Answer:
active devices are inexpensive
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83. Which of these is a type of ADC?
Answer
Correct Answer:
pipeline
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84. Why are CMOS good for saving power?
Answer
Correct Answer:
Only one circuit is on
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85. What sort of signal does a relaxation oscillator produce?
Answer
Correct Answer:
non-sinusoidal
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86. What is a common source of wasted power in low power circuit design?
Answer
Correct Answer:
Floating inputs
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87. True or False? Silicon is typically used in mircowave monolithic ICs.
Answer
Correct Answer:
False
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88. True or False: Integrated Injection Logic is generally made using MOSFETs.
Answer
Correct Answer:
False
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89. In synchronous circuits, the maximum possible clock rate is determined by the logic path with the longest propagation delay, called the
Answer
Correct Answer:
critical path
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90. Which of these is a MOSFET amplifier topology?
Answer
Correct Answer:
common source
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91. Which of these technologies consumes most power when at rest?
Answer
Correct Answer:
ECL
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92. An uncharged capacitor acts like which of the following?
Answer
Correct Answer:
A short circuit
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93. True or False? Monolithic circuits have been around the longest period of time.
Answer
Correct Answer:
False
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94. Which type of ADC uses a ladder of comparators, each with a different reference voltage?
Answer
Correct Answer:
Flash ADC
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95. In an MMIC what is the frequency range?
Answer
Correct Answer:
GHz
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96. A "totem pole" or "push-pull" output stage employed in a TTL circuit can solve the problem of
Answer
Correct Answer:
high output resistance
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97. True or false? Placing a postive voltage at the gate of a p-type enchanced mode FET will turn on the switch.
Answer
Correct Answer:
False
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98. With reference to ADCs, what is dither?
Answer
Correct Answer:
deliberately introduced white noise to ADC input
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99. According to Moore's Law, the number of transistors on an IC doubles every
Answer
Correct Answer:
two years
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100. What effect arises when analog frequencies are incorrectly detected due to undersampling?
Answer
Correct Answer:
aliasing
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101. Logical Effort is a means to:
Answer
Correct Answer:
calculate delay in a CMOS circuit
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102. What kind of feedback is used in an op-amp to make a Schmitt trigger?
Answer
Correct Answer:
positive feedback
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103. One technology which uses both BJTs and CMOS is called
Answer
Correct Answer:
BiCMOS
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104. Parasitics become a problem as a circuit becomes:
Answer
Correct Answer:
(All of these)
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105. What is a method used to separate individual electronic components on a silicon substrate?
Answer
Correct Answer:
p-n junction isolation
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106. True or False? A temperature sensor would likely used a digital circuit.
Answer
Correct Answer:
False
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107. Ideally, in an LC circuit what happens to the total energy?
Answer
Correct Answer:
It is conserved
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108. What is a characteristic of asynchronous sequential logic?
Answer
Correct Answer:
it does not make use of a clock signal
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109. What can be used to transfer voltage from a circuit with high output impedance to one with low input impedance?
Answer
Correct Answer:
voltage buffer amplifier
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110. A circuit that can convert a DC signal to an AC signal with a frequency dependent on the input voltage is called a:
Answer
Correct Answer:
voltage controlled oscillator
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111. Which of these is NOT a procedure used for IC construction?
Answer
Correct Answer:
Electrolysis
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112. What is correct symbolic name of ground pin on IC?
Answer
Correct Answer:
Vss
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113. A mixed-signal chip is often found in
Answer
Correct Answer:
a cell phone
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114. What is an example of volatile memory?
Answer
Correct Answer:
DRAM
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115. In which type of digital logic does the output depend on just the present input (and not on past inputs)?
Answer
Correct Answer:
Combinational Logic
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116. True or False: All logic families use the same voltage levels to represent logic 0 and logic 1.
Answer
Correct Answer:
False
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117. What does ASIC stand for?
Answer
Correct Answer:
Application Specific Integrated Circuits
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118. Which of these is a type of DAC?
Answer
Correct Answer:
R-2R
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119. Which program is useful when trying to solve complex integrated circuits?
Answer
Correct Answer:
SPICE
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120. According to the Nyquist sampling theorem, what should be the minimum sampling rate of an ADC?
Answer
Correct Answer:
twice the highest frequency of the analog signal
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121. What is the round-off error between the analog input and the digitized output of an ADC called?
Answer
Correct Answer:
quantization error
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122. What kind of IC can be customised by a user after it has been manufactured?
Answer
Correct Answer:
FPGA
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123. If you were to design an audio amplifier which type of integrated circuit would you use?
Answer
Correct Answer:
Analog circuit
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124. Another name for a base wafer is
Answer
Correct Answer:
the substrate material
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125. Which of these is a hardware description language used to design an application specific IC?
Answer
Correct Answer:
Verilog
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126. A thin slice of silicon crystal used in IC fabrication is called a
Answer
Correct Answer:
wafer
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127. Which of these uses a DAC?
Answer
Correct Answer:
speaker system
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128. With reference to CMOS and other IC technologies, what is "dynamic power consumption"?
Answer
Correct Answer:
power consumed while switching logic states
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129. True or False? Digital circuits typically can have an infinite amount of states.
Answer
Correct Answer:
False
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130. Which of these is a commonly used simulator for predicting the behaviour of an IC?
Answer
Correct Answer:
SPICE
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131. What is an IC package with a rectangular housing and two parallel rows of connecting pins called?
Answer
Correct Answer:
dual in-line package
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132. True or False: A DRAM uses one capacitor and one transistor per data bit.
Answer
Correct Answer:
True
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133. Another name for an integrated circuit is
Answer
Correct Answer:
microchip
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134. Logic gates usually have how many states?
Answer
Correct Answer:
2
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135. True or False: TTL integrated circuits offer more speed than similar RTL circuits.
Answer
Correct Answer:
True
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136. True or False: An Instrumentation Amplifier has input buffer amplifiers in its construction.
Answer
Correct Answer:
True
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137. Which of the following could be an element in an integrated circuit?
Answer
Correct Answer:
(All of these)
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138. P-N junction semiconductor creates a
Answer
Correct Answer:
diode
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139. True or False? Integrated Circuits typically only have one layer.
Answer
Correct Answer:
False
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140. Which of the following is a state for logic gates?
Answer
Correct Answer:
0
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141. Suppose you have a simple circuit with V=4 volts and R= 4 Ohm. What is the current that runs through that circuit?
Answer
Correct Answer:
1 ampere
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142. What does FET stand for?
Answer
Correct Answer:
Field Effect Transistor
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143. True or False? ULSI stands for Ultra Large Scale Integration
Answer
Correct Answer:
True
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144. A register is a type of integrated circuit that deals with memory.
Answer
Correct Answer:
True
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145. Integrated circuits can be divided into which two categories?
Answer
Correct Answer:
Analog and digital
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146. Which of the following is the correct formula for the relationship between voltage, current and resistance?
Answer
Correct Answer:
V=IR
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147. Integrated circuits can be found in which of the following
Answer
Correct Answer:
(All of these)
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148. What element is most likely used as a semiconductor?
Answer
Correct Answer:
Silicon
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149. True or False? A truth table can be helpful when analzying a digital circuit.
Answer
Correct Answer:
True
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150. True or False? An integrated circuit can consist of thousands of transistors?
Answer
Correct Answer:
True
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151. True or False? A mircoprocessor in a computer is often composed of billions of transistors.
Answer
Correct Answer:
True
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152. True or False? A NAND gate would typically be found in a digital circuit.
Answer
Correct Answer:
True
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153. What material is an integrated circuit typically made out of?
Answer
Correct Answer:
Semiconductor
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154. True or False? A digital circuit only can accept voltages at a certain level.
Answer
Correct Answer:
True
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155. True or False? An integrated circuit can be used as an amplifier
Answer
Correct Answer:
True
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156. Bipolar transistors use what item(s) to conduct
Answer
Correct Answer:
holes and electrons
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157. What can be used as a control system to synchronise the input and output frequencies of a system?
Answer
Correct Answer:
phase locked loop
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158. What is a term for the maximum rate of change of output voltage per unit time?
Answer
Correct Answer:
slew rate
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159. True or False? A diode has typically low resistance in one direction and very high resistance in the other direction?
Answer
Correct Answer:
True
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