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Which of the following is correct for a D latch?
- a)The output toggles if one of the inputs is held HIGH
- b)Q output follows the input D when the enable is HIGH
- c)Only one of the inputs can be HIGH at a time
- d)The output complement follows the input when enabled
Correct answer is option 'B'. Can you explain this answer?
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Which of the following is correct for a D latch?a)The output toggles i...
If the clock is HIGH then the D flip-flop operates and we know that input equals to output in case of D flip flop. It stores the value on the data line.
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Which of the following is correct for a D latch?a)The output toggles i...
Explanation:
A D latch is a type of sequential logic circuit that can store one bit of data. It has two inputs, D (data) and E (enable), and two outputs, Q (output) and Q' (complement of the output).
The correct statement for a D latch is option B: "Q output follows the input D when the enable is HIGH."
Here is a detailed explanation of why option B is correct:
1. D Latch Operation:
A D latch operates on the principle of transparency. When the enable input E is HIGH, the latch is said to be enabled, and the output Q follows the input D. This means that the value of D is transferred to Q.
2. Enable Input (E):
The enable input E controls the operation of the latch. When E is HIGH, the latch is transparent, and any changes in the input D are reflected in the output Q. When E is LOW, the latch is in a hold state, and the output Q remains unchanged.
3. Output (Q) and Complement (Q'):
The output Q represents the stored value in the latch, which follows the input D when the enable E is HIGH. The complement of the output, Q', represents the inverse of Q.
4. Functionality of Option B:
Option B states that "Q output follows the input D when the enable is HIGH." This means that when the enable input E is HIGH, any changes in the input D are reflected in the output Q. In other words, the output Q tracks the input D.
5. Other Options:
Option A states that "the output toggles if one of the inputs is held HIGH." This is not true for a D latch. The output of a D latch only changes when the enable input is HIGH and the input D changes.
Option C states that "only one of the inputs can be HIGH at a time." This is not true for a D latch. Both inputs D and E can be HIGH simultaneously.
Option D states that "the output complement follows the input when enabled." This is partially true, as the output Q' does represent the complement of the output Q. However, the statement does not mention the input D, which is essential for the latch's operation.
Therefore, the correct option for a D latch is option B: "Q output follows the input D when the enable is HIGH."
A D latch is a type of sequential logic circuit that can store one bit of data. It has two inputs, D (data) and E (enable), and two outputs, Q (output) and Q' (complement of the output).
The correct statement for a D latch is option B: "Q output follows the input D when the enable is HIGH."
Here is a detailed explanation of why option B is correct:
1. D Latch Operation:
A D latch operates on the principle of transparency. When the enable input E is HIGH, the latch is said to be enabled, and the output Q follows the input D. This means that the value of D is transferred to Q.
2. Enable Input (E):
The enable input E controls the operation of the latch. When E is HIGH, the latch is transparent, and any changes in the input D are reflected in the output Q. When E is LOW, the latch is in a hold state, and the output Q remains unchanged.
3. Output (Q) and Complement (Q'):
The output Q represents the stored value in the latch, which follows the input D when the enable E is HIGH. The complement of the output, Q', represents the inverse of Q.
4. Functionality of Option B:
Option B states that "Q output follows the input D when the enable is HIGH." This means that when the enable input E is HIGH, any changes in the input D are reflected in the output Q. In other words, the output Q tracks the input D.
5. Other Options:
Option A states that "the output toggles if one of the inputs is held HIGH." This is not true for a D latch. The output of a D latch only changes when the enable input is HIGH and the input D changes.
Option C states that "only one of the inputs can be HIGH at a time." This is not true for a D latch. Both inputs D and E can be HIGH simultaneously.
Option D states that "the output complement follows the input when enabled." This is partially true, as the output Q' does represent the complement of the output Q. However, the statement does not mention the input D, which is essential for the latch's operation.
Therefore, the correct option for a D latch is option B: "Q output follows the input D when the enable is HIGH."
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Which of the following is correct for a D latch?a)The output toggles if one of the inputs is held HIGHb)Q output follows the input D when the enable is HIGHc)Only one of the inputs can be HIGH at a timed)The output complement follows the input when enabledCorrect answer is option 'B'. Can you explain this answer?
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