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`1. __________ is the ratio of change of input offset voltage to the variations in temperature.`

**Answers:**

• Input offset voltage

• Input offset voltage drift

• Input offset current drift

• Power supply rejection

`2. A silicon controlled switch (SCS) operates at _______`

**Answers:**

• low current and high voltage.

• high current and low voltage.

• high current and high voltage.

• low current and low voltage.

`3. A ___________ is used to compensate for the distortion of the digital data pulses transmitted over telephone wires.`

**Answers:**

• phase shifter

• scale changer

• DC offset

• RC band filter

• delay equalizer

`4. If the MOSFET has a thin oxide gate,`

**Answers:**

• its threshold voltage is high.

• its threshold voltage is low.

• logic 0 is not detected on the bit line.

`5. In an integrated circuit, how many outputs does an OR gate have?`

**Answers:**

• 1

• 2

• 3

• 4

`6. The time required for the collector current to rise to a value of 10% of its maximum is known as:`

**Answers:**

• delay time.

• rise time.

• fall time.

• storage time.

```
7. A 'twisted ring counter' is_______
where N represents a clock pulse.
```

**Answers:**

• an N:1 scalar

• a 2N:1 scalar

• a N:2 scalar

• a 3N:1 scalar

`8. 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?`

**Answers:**

• Feedback network

• Mixer network

• Sampling network

• Signal source network

`9. In a 'race around' condition of an integrated circuit, _______`

**Answers:**

• the clocked pulse train will be equal to 1.

• for a particular time period of pulse, the output will be 0.

• for a particular time period of pulse, the output will be 1.

• the output will oscillate between 0 and 1.

`10. 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:**

• 0

• 1

• 2

• 0.1

`11. Which type of distortion results from new frequency in the output which is not present at the input signal?`

**Answers:**

• Non-linear distortion

• Frequency distortion

• Phase shift distortion

`12. What does the above symbol represent?`

**Answers:**

• Half binary adder

• Full binary adder

• MSI adder

• Parallel operation adder

`13. A digital system to know whether the sum of binary bits in a particular word is even or odd is known as_______.`

**Answers:**

• demultiplexer

• decoder

• digital comparator

• true complement element comparator

• parity checker

`14. A 4 bit adder requires a ______ bit package.`

**Answers:**

• 12

• 14

• 16

• 18

`15. In a Schottky transistor, what is the value of the base to the collector voltage?`

**Answers:**

• 0.2 volt

• 0.3 volt

• 0.4 volt

• 0.6 volt

`16. Which among the following transistors is used only if its collector is at a fixed negative voltage?`

**Answers:**

• Supergain NPN transistors

• Vertical PNP transistors

• Lateral PNP transistors

`17. What is the second stage of an integrated operational amplifier?`

**Answers:**

• Differential amplifier with a double ended output

• DC level translator input and a driver output

• Differential amplifier with a single ended output

• Emitter flow

`18. Which among the following types of RAM uses a three device information storage cell on the parasitic gate?`

**Answers:**

• Bipolar MOSRAM

• Static MOSRAM

• Dynamic MOSRAM

`19. In a paraphase amplifier, _______`

**Answers:**

• 1 output is equal in magnitude but opposite in a phase.

• 2 outputs are equal in magnitude but opposite in a phase.

• 3 outputs are equal in magnitude but opposite in a phase.

• 4 outputs are equal in magnitude but opposite in a phase.

```
20. Which among the following is the correct function for the low 3-db frequency where
R is the resistor and
C is the capacitor
```

**Answers:**

• 1 / 2?? RC

• 2??RC

• 1/RC

• RC / 2??

`21. When a bit 1 is present on the MSB line, _______`

**Answers:**

• the single pole double throw switch (SPDT) connects the resistor to the reference voltage.

• the single pole double throw switch (SPDT) connects the resistor to the ground.

• the analog voltage becomes proportional to the digital input.

`22. Which among the following flip flops changes the state of an output with each clock pulse just like a toggle switch?`

**Answers:**

• S-R flip flop

• J-K flip flop

• T flip flop

• D flip flop

`23. In a register, the n number of flip flops can store_______.`

**Answers:**

• n- bit words

• (n ??? 1) bit words

• (n + 1) bit words

• (1 / n) bit words

`24. If the input to an operational amplifier comparator is a sine wave, the output will be a ___________`

**Answers:**

• sine wave with positive and negative pulses.

• sine wave with only negative pulses.

• square wave with positive and negative pulses.

• square wave with only positive pulses.

`25. The above diagram represents a _______.`

**Answers:**

• 1 bit memory

• 2 bit memory

• 3 bit memory

• 4 bit memory

`26. Which among the following is the correct expression for the 'voltage gain' of a transistor?`

**Answers:**

• Input voltage ??? Output voltage

• Input voltage + Output voltage

• Input voltage / Output voltage

• Output voltage / Input voltage

`27. Parasitic capacitance is:`

**Answers:**

• the sum of the capacitance from the bottom of the n- type region and the sidewalls of the isolation islands to the p+ region.

• the difference of the capacitance from the bottom of the n- type region and the sidewalls of the isolation islands to the p+ region

• the square of the capacitance from the bottom of the n- type region and the sidewalls of the isolation islands to the p+ region.

• the product of the capacitance from the bottom of the n- type region and the sidewalls of the isolation islands to the p+ region.

`28. Which among the following is a characteristic of 'ratio less' powerless circuits?`

**Answers:**

• All the devices are of minimum geometry.

• The chip size is quite large for a specified number of gates.

• The output depends upon the ratio of resistance.

• The output is independent of the ratio of resistance.

`29. What is the conduction angle?`

**Answers:**

• The duration for which the silicon controlled rectifier is off

• The duration for which the silicon controlled rectifier is on

• The angle at which the control voltage exceeds the breakdown voltage

• The angle at which the trigger breakdown voltage exceeds the controlled voltage

```
30. What is the correct expression for the common mode rejection ratio where
Vd is the differential voltage gain, and
Vc is the common mode voltage gain
```

**Answers:**

• Vd / Vc

• Vd ??? Vc

• Vd + Vc

• Vd x Vc

```
31. The quiescent value Ic is equal to_______
Here Im is peak sinusoidal current.
```

**Answers:**

• Im???2

• ???Im

• ???2 / Im

• Im / ???2

`32. The phase of a sinusoidal input voltage undergoes a phase shift from_______.`

**Answers:**

• 0?? to 180??

• 0?? to 360??

• 0?? to 90??

• 0?? to 270??

`33. Which among the following is a parallel plate capacitor?`

**Answers:**

• Thin film capacitor

• Junction capacitor

• Monolithic capacitor

`34. Which among the following is not an element of medium scale integration?`

**Answers:**

• Read only memories

• Shift registers

• Counters

• Decoders

`35. Which among the following shift registers is DC stable and is able to work without a minimum clock rate?`

**Answers:**

• Three phase shift register

• Four phase shift register

• Dynamic MOS shift register

• Static MOS shift register

`36. Which among the following shift registers is used to perform multiplication or division by multiples of 2?`

**Answers:**

• A parallel to serial register

• A serial to parallel register

• A parallel in, parallel out register

• A serial in, serial out register

• A right shift, left shift register

`37. Which among the following is not a characteristic of MOS circuits?`

**Answers:**

• Low packing density

• Small power consumption

• Low cost

• High packing density

• High power consumption

`38. The input resistance of an AC voltage follower is ___________.`

**Answers:**

• 10 M at 150 Hz

• 12 M at 100 Hz

• 1 M at 15 Hz

• 1 M at 150 Hz

`39. 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?`

**Answers:**

• 40

• 32

• 8

• 10

`40. In isolation diffusion, _______`

**Answers:**

• n-type impurities penetrate the p- type epitaxial layer.

• p- type impurities penetrate the n- type epitaxial layer.

• p- type impurities reach the n-type substrate.

• n- type impurities reach the p- type substrate.

`41. What does the bottom layer in an integrated circuit consist of?`

**Answers:**

• p- type silicon

• n- type silicon

• Silicon Dioxide

• Aluminium

`42. For a band reject filter:`

**Answers:**

• the cut off frequency of a low pass section is greater than the cut off frequency of a high pass section.

• the cut off frequency of a low pass section is equal to the cut off frequency of a high pass section.

• the cut off frequency of a low pass section is smaller than the cut off frequency of a high pass section.

`43. How is a storage cell identified in the coincident selection method of random access memory?`

**Answers:**

• From the value of the X address line

• With the help of a three dimensional matrix

• From the value of the Y address line

• From the value of the point where X lines and Y lines intersect

`44. The decoder in an MOS-ROM contains:`

**Answers:**

• NAND gates which are non static.

• NOR gates which are static.

• NAND gates which are static.

• NOR gates which are non static.

`45. 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:`

**Answers:**

• cut off region.

• saturation region.

• active region.

`46. Which amplifier has infinite input and output resistance?`

**Answers:**

• Voltage amplifier

• Current amplifier

• Transresistance amplifier

• Transconductance amplifier

`47. In a ladder type D/A converter, _______`

**Answers:**

• twice the number of resistances is equal to the number of bits.

• the number of resistances is equal to the number of bits.

• thrice the number of resistances is equal to the number of bits.

• half the number of resistances is equal to the number of bits.

`48. 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_______.`

**Answers:**

• divide by N counter

• ripple counter

• synchronous counter

• up-down counter

`49. 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?`

**Answers:**

• 1 ohm

• 20 ohms

• 100 ohms

• 10 ohms

`50. 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?`

**Answers:**

• Grown type construction

• Alloy type construction

• Diffusion type construction

• Epitaxial type construction

`51. If the analog voltage in an analog to digital converter is 4 volts, how many pulses will it generate?`

**Answers:**

• 2

• 4

• 6

• 8

`52. What is the value of the lower base emitter breakdown voltage?`

**Answers:**

• ~7 volts

• ~8 volts

• ~9 volts

• ~10 volts

`53. The p- type substrate of an integrated circuit has a resistivity of:`

**Answers:**

• 10 ohmic centimeters

• 20 ohmic centimeters

• 30 ohmic centimeters

• 40 ohmic centimeters

`54. A 3-db frequency is the one in which:`

**Answers:**

• resistance is equal to the capacitive reactance.

• resistance is half of the capacitive reactance.

• resistance is double the capacitive reactance.

• resistance is one fourth of the capacitive reactance.

`55. Which of the following techniques consists of manufacturing unit cells?`

**Answers:**

• Discretionary wiring

• Fixed interconnection pattern manufacturing

• Polycell making

`56. Which among the following is correct of an 'Encoder'?`

**Answers:**

• It accepts an M-bit word.

• Only one of the inputs is in state 1.

• It generates an N-bit code.

• It establishes the state 1 on only 1.

`57. Which among the above diagram is an unblinking waveform for a character generator system?`

**Answers:**

• A

• B

• C

• D

`58. What is the slew rate in a monolithic operational amplifier?`

**Answers:**

• 10 volts per micro second

• 5 volts per micro second

• 1 volt per micro second

• 2 volts per micro second

`59. Which among the following is a characteristic of programmable attenuator?`

**Answers:**

• It is used as a fixed reference voltage.

• The output is the sum of the digital word and the analog voltage.

• The output voltage is twice the input voltage.

• The output depends upon the binary word.

`60. Which among the following methods of compensation introduces Phase lag into the amplifier?`

**Answers:**

• Pole zero or lag lead compensation

• Lead compensation

• Dominant pole compensation

`61. In which among the following waveform generators is the circuit referred to as 'one shot'?`

**Answers:**

• A triangle wave generator

• A square wave generator

• A pulse generator

`62. In which among the following types of circuits is it possible to fabricate PNP and NPN transistors within the same Silicon substrate?`

**Answers:**

• Hybrid circuits

• Dielectric isolated integrated circuits

• Beam lead monolithic circuits

`63. The time during which the anode voltage should be kept below the maintaining voltage till a critical value is achieved is known as the:`

**Answers:**

• turn on time.

• gate recovery time.

• turn off time.

• gate time to hold.

`64. How many leads are there in a dual in line package of an integrated circuit?`

**Answers:**

• 10

• 11

• 12

• 13

• 14

```
65. 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?
```

**Answers:**

• A

• B

• C

• D

`66. In which among the following classes of amplifiers does the current flow all the time in the output circuit?`

**Answers:**

• Cass A

• Class B

• Class AB

• Class C

`67. The weight of the most significant bit (MSB) is:`

**Answers:**

• twice the stable reference voltage.

• thrice the stable reference voltage.

• half the stable reference voltage.

• equal to the stable reference voltage.

`68. In an ideal operational amplifier, the value of input resistance R is equal to _______.`

**Answers:**

• ???

• 0

• 1

• -1

`69. Which application of a read only memory is used when an address is changed by means of a counter?`

**Answers:**

• Combination logic

• Character generator

• Seven segment visible display

• Sequence generator

• Look up table

`70. How many layers of material are there in the basic structure of an integrated circuit?`

**Answers:**

• 2

• 3

• 4

• 5

`71. The television tube is an example of a_______.`

**Answers:**

• DC voltage follower

• current to voltage convertor

• voltage to current convertor

`72. What is a flip flop?`

**Answers:**

• A feedback combination which can never be locked or latched in a place

• A feedback combination which is a 5 bit memory unit

• A feedback combination which can exist in only one stable state

• A feedback combination in which the output of a single input NAND gate is connected to the input of the other gate

`73. A 4 bit adder requires a ______ pin package.`

**Answers:**

• 12

• 14

• 16

• 18

`74. Which among the following applications of a counter is related to the transmission and reflection of a pulse over a period of time?`

**Answers:**

• Measurement of frequency

• Measurement of time

• Measurement of distance

• Measurement of speed

`75. In which among the following is the masking and etching process used to make an opening in the p- type region?`

**Answers:**

• Isolation diffusion

• Based diffusion

• Emitter diffusion

• Epilaxial diffusion

`76. If a person wants to read or write 20 words of 10 bits each, how many storage cells will be used?`

**Answers:**

• 100

• 200

• 300

• 400

`77. In an integrated circuit, what number of gates on a chip is considered a small scale integration?`

**Answers:**

• Less than 12 gates

• Between 15 to 20 gates

• Between 20 to 30 gates

• More than 30 gates

`78. What is the range of the resistance of a thin film resistor?`

**Answers:**

• 20?? to 50K

• 50?? to 100K

• 200?? to 500K

• 2?? to 5K

`79. How many dots can be generated in a character matrix of a character waveform at a given instant?`

**Answers:**

• 0

• 1

• 2

• 3

`80. What is the value of the voltage difference existing between the two logic levels of an emitter coupled logic?`

**Answers:**

• 500 milli volts

• 600 milli volts

• 700 milli volts

• 800 milli volts

`81. 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?`

**Answers:**

• 25%

• 50%

• 75%

• 100%