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Given below are three types of converters
  1. successive approximation type
  2. weighted resistor type
  3. R-2R ladder type
Which one of the types are D to A converter? 
  • a)
    only 1 and 2 
  • b)
    only 2 and 3 
  • c)
    only 1 and 3  
  • d)
    1, 2 and 3 
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Given below are three types of converters successive approximation typ...
Concept:
D/A converter:
D/A converter converts digital or binary data into its equivalent analog data. This analog data is required to drive motors and other analog devices. The converted analog value is either in voltage or current form.
There are two types of D/A converters:
  • Weighted Resistor or Resistive Divider type
  • R-2R Ladder-type
Weighted resistor DAC:
It uses a summing amplifier with a binary-weighted network as shown below.
For an n-bit ADC,
  • If the weight of MSB resistor is 2R, then the weight of the LSB resistor is 2nR.
  • We require n number of resistors.
  • We require n different values of resistors i.e. 2R, 22R, 23R, …, 2nR.
The accuracy and stability depend on the accuracy of resistors.
The requirement of a wide range of resistor values restricts the use up to 8-bit.
R-2R ladder resistor DAC:
It uses a summing amplifier with an R-2R ladder network as shown below.

For n-bit DAC, it requires only 2 different values of resistors i.e. R and 2R.
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Given below are three types of converters successive approximation type weighted resistor type R-2R ladder typeWhich one of the types are D to A converter?a)only 1 and 2b)only 2 and 3c)only 1 and 3 d)1, 2 and 3Correct answer is option 'B'. Can you explain this answer?
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