IC Applications Mid - II, November - 2014

1.Which of the following is the integrating ADC
  • Parallel comparator
  • Dual slope
  • Counter type
  • Successive approximation
Answer: B
2.The minimum input voltage recognized as HIGH by which TTL gate.
  • 2.0 V
  • 2.4 V
  • 0.8 V
  • 5.0 V
Answer: A
3.Which is the fastest ADC
  • Counter type converter
  • Servo converter
  • Parallel comparator
  • R-2R ladder
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?
  • 3.52 V
  • 3.78 V
  • 3.98 V
  • 4.5 V
Answer: B
5.In which circuits the outputs at any instant of time depend upon the inputs present at that instant of time.
  • Combinational
  • Sequential
  • Both A and B
  • None
Answer: A
6.Which is seven segment decoder?
  • 74X49
  • 74X138
  • 74X491
  • 74X149
Answer: B
7.Slowly varying signals
  • Dual slope ADC are suitable
  • Single slope ADC are suitable
  • Monolithic ADC are suitable
  • Flash type are suitable
Answer: A
8.Important characteristics of converter are.
  • Resolution
  • Accuracy
  • Linearity
  • Above all
Answer: D
9.Monolithic DACs are available for what bit resolution.
  • 8
  • 18
  • 28
  • None
Answer: A
10.Digital circuits with MOSFETs can be grouped into ------------
  • PMOS
  • NMOS
  • CMOS
  • All the above
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.