IC Applications Mid - II, November - 2014
1.Which of the following is the integrating ADC
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Parallel comparator
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Dual slope
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Counter type
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Successive approximation
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Answer: B
2.The minimum input voltage recognized as HIGH by which TTL gate.
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2.0 V
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2.4 V
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0.8 V
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5.0 V
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Answer: A
3.Which is the fastest ADC
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Counter type converter
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Servo converter
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Parallel comparator
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R-2R ladder
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Answer: C
4.The basic step of a 9-bit DAC is 10.3 mV. If 000000000 represents 0 V, what output is produced if the input is 101101111?
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3.52 V
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3.78 V
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3.98 V
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4.5 V
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Answer: B
5.In which circuits the outputs at any instant of time depend upon the inputs present at that instant of time.
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Combinational
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Sequential
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Both A and B
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None
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Answer: A
6.Which is seven segment decoder?
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74X49
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74X138
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74X491
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74X149
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Answer: B
7.Slowly varying signals
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Dual slope ADC are suitable
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Single slope ADC are suitable
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Monolithic ADC are suitable
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Flash type are suitable
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Answer: A
8.Important characteristics of converter are.
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Resolution
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Accuracy
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Linearity
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Above all
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Answer: D
9.Monolithic DACs are available for what bit resolution.
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8
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18
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28
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None
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Answer: A
10.Digital circuits with MOSFETs can be grouped into ------------
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PMOS
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NMOS
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CMOS
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All the above
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Answer: D
11.The periodic recharging of DRAM memory cells is called -------------------------
Answer: Refreshing
12.------------------------- is a binary counter that is designed to count to 10 10 , or 1010 2 .
Answer: Decade Counter
13.The ------------------ gate is the basic TTL logic circuit
Answer: NAND
14.Conversion time of successive approximation ADC for n-bit is ----------
Answer: 2
15.For 74 X 139 dual 2 to 4 decoder, 011 input gives ------------------ output.
Answer: D1 & D1ยน
16.For 74 X 151, input 0001 produces output is --------------
Answer: 7
17.The amount of time that the output of a logic circuit takes to change from one state to another is called as --------------------------
Answer: Resolution
18.Successive Approximation type ADC completes n-bit conversion in ----------------------
Answer: n-clock periods.
19.The output voltage produced by D/A converter whose output range is 0 to 10 v& input binary number is 10 ( for 2-bit D/A converter ) ------------------------Volts.
Answer: 5V
20.All digital voltmeters use ------------- ADC.
Answer: Single or multiple functions.