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An 8 bit unipolar Successive Approximation Register type ADC is used to convert 3.5V to digital equal output. The reference voltage is +5V. The output of ADC at end of 3rd clock pulse after the start of conversion is ________.
- a)1010 0000
- b)1000 0000
- c)0000 0001
- d)0000 0011
Correct answer is option 'A'. Can you explain this answer?
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An 8 bit unipolar Successive Approximation Register type ADC is used t...
The block diagram of SAR type ADC is as follows
Unipolar means all the voltages will be +ve i.e. nothing is –ve. The functionality of SAR type DAC is, it will load a value to output register with MSB=1 and remaining bit=0, and it will cross check a logic as follows.
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An 8 bit unipolar Successive Approximation Register type ADC is used t...
Problem: An 8 bit unipolar Successive Approximation Register type ADC is used to convert 3.5V to digital equal output. The reference voltage is 5V. The output of ADC at end of 3rd clock pulse after the start of conversion is ________.
Solution:
Solution:
- Unipolar Successive Approximation ADC: A successive approximation ADC is a type of analog-to-digital converter that converts a continuous analog waveform into a discrete digital representation by gradually narrowing down a range of possible values. In a unipolar successive approximation ADC, the input signal is positive and the reference voltage is also positive.
- Resolution: The resolution of an ADC is the number of bits in the digital output. In this case, the ADC is 8-bit, which means there are 2^8 = 256 possible output values.
- Conversion Process: The conversion process in a successive approximation ADC involves comparing the input signal with a series of voltages that are generated by a DAC (Digital-to-Analog Converter).
- Start of Conversion: When the conversion process is started, the input signal is sampled and held, and the ADC generates the first voltage from the DAC. This voltage is compared to the input signal, and the most significant bit of the output is set to 1 if the voltage is greater than or equal to the input signal, and set to 0 otherwise.
- Successive Approximation: The ADC then generates the next voltage from the DAC, based on the current state of the output bits. This voltage is compared to the input signal, and the next most significant bit of the output is set to 1 or 0, depending on the result of the comparison. This process is repeated for each bit of the output, until all bits have been set.
- Given: The input signal is 3.5V and the reference voltage is 5V.
- Calculation: The voltage resolution of the ADC is 5V / 256 = 0.0195V. The input signal of 3.5V corresponds to a digital value of (3.5V / 0.0195V) = 179.49, which is approximately equal to 179. The conversion process starts by comparing the input signal to 128 (2^7), which is the midpoint of the possible output values. Since 3.5V is greater than 2.5V (halfway between 0V and 5V), the most significant bit of the output is set to 1. The ADC then generates the next voltage from the DAC, which is 64 (2^6), and compares it to the input signal. Since 3.5V is greater than 2.8125V (128 + 64), the next most significant bit of the output is set to 1. The ADC then generates the next voltage from the DAC, which is 96 (2^7 + 2^5), and compares it to the input signal. Since 3.5V is less than 3.15625V (128 + 64 + 32), the third bit of the output is set to
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An 8 bit unipolar Successive Approximation Register type ADC is used to convert 3.5V to digital equal output. The reference voltage is +5V. The output of ADC at end of 3rd clock pulse after the start of conversion is ________.a)1010 0000b)1000 0000c)0000 0001d)0000 0011Correct answer is option 'A'. Can you explain this answer?
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An 8 bit unipolar Successive Approximation Register type ADC is used to convert 3.5V to digital equal output. The reference voltage is +5V. The output of ADC at end of 3rd clock pulse after the start of conversion is ________.a)1010 0000b)1000 0000c)0000 0001d)0000 0011Correct answer is option 'A'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about An 8 bit unipolar Successive Approximation Register type ADC is used to convert 3.5V to digital equal output. The reference voltage is +5V. The output of ADC at end of 3rd clock pulse after the start of conversion is ________.a)1010 0000b)1000 0000c)0000 0001d)0000 0011Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An 8 bit unipolar Successive Approximation Register type ADC is used to convert 3.5V to digital equal output. The reference voltage is +5V. The output of ADC at end of 3rd clock pulse after the start of conversion is ________.a)1010 0000b)1000 0000c)0000 0001d)0000 0011Correct answer is option 'A'. Can you explain this answer?.
An 8 bit unipolar Successive Approximation Register type ADC is used to convert 3.5V to digital equal output. The reference voltage is +5V. The output of ADC at end of 3rd clock pulse after the start of conversion is ________.a)1010 0000b)1000 0000c)0000 0001d)0000 0011Correct answer is option 'A'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about An 8 bit unipolar Successive Approximation Register type ADC is used to convert 3.5V to digital equal output. The reference voltage is +5V. The output of ADC at end of 3rd clock pulse after the start of conversion is ________.a)1010 0000b)1000 0000c)0000 0001d)0000 0011Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An 8 bit unipolar Successive Approximation Register type ADC is used to convert 3.5V to digital equal output. The reference voltage is +5V. The output of ADC at end of 3rd clock pulse after the start of conversion is ________.a)1010 0000b)1000 0000c)0000 0001d)0000 0011Correct answer is option 'A'. Can you explain this answer?.
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