Analog and Digital IC Applications Mid - II, November - 2014

1.Smoothing filter is used to reduce the effect of
  • Quantization noise
  • white noise
  • Gaussian noise
  • none
Answer: A
2.The smallest change in voltage which may be produced at the output or input of the converter is known as
  • Resistivity
  • selectivity
  • resolution
  • absolute accuracy
Answer: C
3.I f a DAC has to be monotonic, the error should be less than
  • +1/2 LSB at each output level
  • +1/3 LSB at each output level
  • ±1/2 LSB at each input level
  • ±1/2 LSB at each output level
Answer: D
4.The performance of a converter changes with
  • Temperature
  • age &power supply variations
  • both A&B
  • none
Answer: C
5.The nominal value of the DC supply voltage for TTL devices is
  • -6Volts
  • -5Volts
  • -2Volts
  • -7Volts
Answer: B
6.How many full adders are required to construct an m-bit parallel adder
  • m-1
  • m+1
  • m/2
  • m
Answer: A
7.A multiplexer with its address bits generated by a counter operates as a
  • parallel-to-serial converter
  • serial-to-parallel converter
  • Modified counter
  • modified multiplexer
Answer: A
8.Which logic gate acts as basic comparator
  • NOR
  • NAND
  • EX-NOR
  • EX-OR
Answer: C
9.The contents of EPROM can be erased by exposing it to
  • X-rays
  • Gama rays
  • visible light
  • UV light
Answer: D
10.A flip-flop is known more formally as a
  • Monostable multivibrator
  • astable multivibrator
  • bistable multivibrator
  • none
Answer: C
11.________________ are classified broadly into two groups according to their conversion techniques.
Answer: ADC’s
12.The ANSI/IEEE standard symbol that designates an open collector output for an inverter is _______.
Answer:
13.The _________ is a circuit shifts back & forth between two stable states upon application of proper inputs.
Answer: Flip-flop
14.Both DAC&ADC are also known as __________.
Answer: Data converters
15.The __________ process is called programming.
Answer: Fuse blowing
16.The resistive techniques used for the implementation of the basic DAC technique are ____________.
Answer: Weighted resistor DAC,R-2R ladder, inverted R-2R ladder.
17.Dynamic shift registers are made up of ___________.
Answer: MOS inverters
18.A monotonic DAC is a one whose analog output increases for an ________ in digital input.
Answer: Increase
19._________ is one in which the data is transferred into the register in serial form.
Answer: Serial loading
20.Another name for master - slave flip-flop is ________________ .
Answer: Data lock-out flip-flop