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Given below are three types of converters
- successive approximation type
- weighted resistor type
- R-2R ladder type
Q. 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...
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:
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,
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.
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.
Most Upvoted Answer
Given below are three types of converters successive approximation typ...
Explanation:
D to A converter:
A D to A (digital to analog) converter is a device that converts a digital signal into an analog signal. It takes a binary input and produces an analog output that represents the digital input value. There are various types of D to A converters, including the successive approximation type, weighted resistor type, and R-2R ladder type.
Successive Approximation Type:
The successive approximation type D to A converter is a commonly used type of converter. It works by comparing the digital input value with an internal reference voltage and adjusting the output voltage accordingly. The converter starts with the most significant bit (MSB) and compares it with the reference voltage. Based on the comparison, the MSB is set to either 0 or 1, and the next bit is then compared. This process continues until all the bits have been compared and the final analog output is obtained. However, the successive approximation type D to A converter is not mentioned in the given options.
Weighted Resistor Type:
The weighted resistor type D to A converter is another commonly used type of converter. It works by using a network of resistors with different values to convert the digital input into an analog output. Each bit of the digital input is connected to a resistor, and the output voltage is obtained by summing the voltages across the resistors. The resistors are weighted such that the voltage across each resistor is proportional to its corresponding bit value. The weighted resistor type D to A converter is mentioned in option 2.
R-2R Ladder Type:
The R-2R ladder type D to A converter is also a commonly used type of converter. It works by using a network of resistors arranged in a ladder-like structure to convert the digital input into an analog output. The ladder structure consists of two types of resistors - R and 2R. The digital input bits are connected to switches that control the connection of the resistors. The output voltage is obtained by summing the voltages across the resistors. The R-2R ladder type D to A converter is mentioned in option 3.
Conclusion:
From the given options, it can be concluded that the weighted resistor type and R-2R ladder type are D to A converters. Therefore, the correct answer is option B, which states that only types 2 and 3 are D to A converters.
D to A converter:
A D to A (digital to analog) converter is a device that converts a digital signal into an analog signal. It takes a binary input and produces an analog output that represents the digital input value. There are various types of D to A converters, including the successive approximation type, weighted resistor type, and R-2R ladder type.
Successive Approximation Type:
The successive approximation type D to A converter is a commonly used type of converter. It works by comparing the digital input value with an internal reference voltage and adjusting the output voltage accordingly. The converter starts with the most significant bit (MSB) and compares it with the reference voltage. Based on the comparison, the MSB is set to either 0 or 1, and the next bit is then compared. This process continues until all the bits have been compared and the final analog output is obtained. However, the successive approximation type D to A converter is not mentioned in the given options.
Weighted Resistor Type:
The weighted resistor type D to A converter is another commonly used type of converter. It works by using a network of resistors with different values to convert the digital input into an analog output. Each bit of the digital input is connected to a resistor, and the output voltage is obtained by summing the voltages across the resistors. The resistors are weighted such that the voltage across each resistor is proportional to its corresponding bit value. The weighted resistor type D to A converter is mentioned in option 2.
R-2R Ladder Type:
The R-2R ladder type D to A converter is also a commonly used type of converter. It works by using a network of resistors arranged in a ladder-like structure to convert the digital input into an analog output. The ladder structure consists of two types of resistors - R and 2R. The digital input bits are connected to switches that control the connection of the resistors. The output voltage is obtained by summing the voltages across the resistors. The R-2R ladder type D to A converter is mentioned in option 3.
Conclusion:
From the given options, it can be concluded that the weighted resistor type and R-2R ladder type are D to A converters. Therefore, the correct answer is option B, which states that only types 2 and 3 are D to A converters.
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