Data Conversion MCQ

Test your knowledge with important Data Conversion MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Data Conversion MCQs at Bissoy

• What is the dynamic range of a 12 bit converter?
  ক

  81.5dB

  খ

  72.24dB

  গ

  62.35dB

  ঘ

  10.254dB
• Find the resolution of an ADC which uses 14 bit numbers and have a voltage range of -6V to +6V?
  ক

  845.65μV

  খ

  3.56μV

  গ

  0.00154μV

  ঘ

  732.5μV
• Which of the following is the fastest type of ADC?
  ক

  Successive approximation conversion

  খ

  Flash conversion

  গ

  Delta encoded conversion

  ঘ

  Pipelined conversion
• During the sample mode the sample and hold circuit passes the analog signal unchanged.
  ক

  True

  খ

  False
• What is the maximum operation frequency that can be used if the settling time is 100ns?
  ক

  10MHz

  খ

  11MHz

  গ

  12MHz

  ঘ

  13MHz
• Settling time is the time taken to convert one binary data into analog.
  ক

  True

  খ

  False
• What is the alias produced when a signal of 15 MHz is sampled at a rate of 28 MHz?
  ক

  10MHz

  খ

  11MHz

  গ

  12MHz

  ঘ

  13MHz
• What is the resolution of a sting DAC if the reference voltage is 10V and the number of input bits is 3?
  ক

  1.25V

  খ

  1.75V

  গ

  1.23V

  ঘ

  0.25V
• Which of the following does not belong to the R-2R converter?
  ক

  Reference regulators

  খ

  Resistor network

  গ

  Electronic switches

  ঘ

  Input amplifiers
• Pick the odd one out?
  ক

  R-2R converters

  খ

  String converters

  গ

  Weighted current source converters

  ঘ

  Flash conversion
• Which of the following is not an advantage of undersampling?
  ক

  Slower ADC

  খ

  Less power

  গ

  Fast microprocessors

  ঘ

  Low memory capacity
• According to the sampling theorem, what is the minimum sampling frequency to retain all the information if the bandwidth of the signal is 20MHz?
  ক

  20MHz

  খ

  40MHz

  গ

  80MHz

  ঘ

  2MHz
• Which circuit is used to produce the IF for better selection and filtering?
  ক

  Downconverter

  খ

  Modulator

  গ

  RC circuit

  ঘ

  Gating circuit
• Which of the following is true with respect to undersampling?
  ক

  High power

  খ

  Greater than Nyquist frequency

  গ

  Use low pass filters

  ঘ

  Less memory size
• What is the process gain of a signal with bandwidth 20MHz and a sampling frequency of 100MHz?
  ক

  4dB

  খ

  5dB

  গ

  4.6dB

  ঘ

  125dB
• What is processing gain?
  ক

  Gain added by the ADC

  খ

  Improvement in SNR

  গ

  Amplitude increment by ADC

  ঘ

  Reduction in error by the ADC circuitry
• Which of the following is not a disadvantage of oversampling?
  ক

  High cost

  খ

  More storage space

  গ

  Less accuracy

  ঘ

  High power consumption
• What is sampling at a rate higher than the Nyquist frequency called?
  ক

  Undersampling

  খ

  Oversampling

  গ

  Distortion

  ঘ

  Aliasing
• Which of the following is not used in antialiasing filters?
  ক

  Single stage RC or LC circuits

  খ

  Multistage LC circuits

  গ

  RC active filter

  ঘ

  High order switched capacitor filter circuits
• What type of filter is an antialiasing filter?
  ক

  Band pass

  খ

  High pass

  গ

  Low pass

  ঘ

  Band stop
• What causes a new signal with frequency fs-fm to be created near the original signal?
  ক

  Attenuation

  খ

  Imaging

  গ

  Aliasing

  ঘ

  Distortion
• Sampling an analog signal produces pulse amplitude modulation.
  ক

  True

  খ

  False
• What is the output of a digital to analog converter?
  ক

  Smooth continuous wave

  খ

  Stairstep wave

  গ

  Triangular waves

  ঘ

  Circular waves
• What is the 5th harmonic of the rectangular digital wave if the frequency is 14kHz?
  ক

  21kHz

  খ

  45kHz

  গ

  25kHz

  ঘ

  70kHz
• What is the signal frequency if the rectangular digital wave has a time period of 71.4μs?
  ক

  14,006Hz

  খ

  15,036Hz

  গ

  14Hz

  ঘ

  21,436Hz
• What is the rms noise voltage if the weight of the LSB is 0.005865?
  ক

  5mV

  খ

  1mV

  গ

  1.7mV

  ঘ

  0.7mV
• What is the maximum amount of quantization error that can occur in a 10bit system in the input analog voltage is from 0V to 6V?
  ক

  10mV

  খ

  6mV

  গ

  0.5mV

  ঘ

  1mV
• What is the error that occurs when the number of bits is not sufficient enough to represent the analog voltages?
  ক

  Data error

  খ

  Sampling error

  গ

  Acquisition error

  ঘ

  Quantization error
• What is the number of voltage increments that can be represented in an 8-bit system?
  ক

  255

  খ

  256

  গ

  215

  ঘ

  126
• What is the minimum rate at which an analog signal of frequency 6000Hz is sampled?
  ক

  6000Hz

  খ

  60Hz

  গ

  120Hz

  ঘ

  12000Hz