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Given below are three types of converters
- successive approximation type
- weighted resistor type
- 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?
Verified 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.
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.
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.
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.
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 typ...
Understanding D to A Converters
In the context of Digital to Analog (D to A) converters, it's essential to identify which types among the listed options are indeed D to A converters.
Types of Converters
1. Successive Approximation Type
- This converter uses a binary search approach to convert digital signals into analog signals.
- It is efficient and widely used in applications requiring moderate speeds and precision.
2. Weighted Resistor Type
- This type utilizes a set of resistors with different weights corresponding to binary values.
- It combines the contributions of each resistor to produce the final analog output.
- It is a fundamental D to A converter design.
3. R-2R Ladder Type
- This design uses a repetitive structure of resistors in a ladder configuration.
- It simplifies the process of creating weighted outputs and is known for its accuracy in producing an analog signal from a digital input.
Correct Answer Analysis
The question asked which of the types are D to A converters. Here’s the breakdown:
- Successive Approximation Type: D to A converter.
- Weighted Resistor Type: D to A converter.
- R-2R Ladder Type: D to A converter.
Conclusion
In conclusion, all three types can function as D to A converters. However, the correct answer provided (option 'B' – only 2 and 3) is incorrect if we consider all three types as capable D to A converters. The correct understanding is that:
- All three types are valid D to A converters.
Thus, the correct answer should be option 'D', which includes all three types.
In the context of Digital to Analog (D to A) converters, it's essential to identify which types among the listed options are indeed D to A converters.
Types of Converters
1. Successive Approximation Type
- This converter uses a binary search approach to convert digital signals into analog signals.
- It is efficient and widely used in applications requiring moderate speeds and precision.
2. Weighted Resistor Type
- This type utilizes a set of resistors with different weights corresponding to binary values.
- It combines the contributions of each resistor to produce the final analog output.
- It is a fundamental D to A converter design.
3. R-2R Ladder Type
- This design uses a repetitive structure of resistors in a ladder configuration.
- It simplifies the process of creating weighted outputs and is known for its accuracy in producing an analog signal from a digital input.
Correct Answer Analysis
The question asked which of the types are D to A converters. Here’s the breakdown:
- Successive Approximation Type: D to A converter.
- Weighted Resistor Type: D to A converter.
- R-2R Ladder Type: D to A converter.
Conclusion
In conclusion, all three types can function as D to A converters. However, the correct answer provided (option 'B' – only 2 and 3) is incorrect if we consider all three types as capable D to A converters. The correct understanding is that:
- All three types are valid D to A converters.
Thus, the correct answer should be option 'D', which includes all three types.
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