Consider the following statements regarding Decoder circuit:1.Decoder converts binary input into one-hot output activating only one output line.2.It can be used for function generation and memory addressing operations.3.All outputs of decoder remain active simultaneously during operation.Which of the above statements is/are correct?
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A decoder maps an n-bit code to one of up to 2^n output lines, commonly as a one-hot output. Decoders are used in memory/address selection and can implement minterm-based logic functions. Key relation: n inputs → up to 2^n decoded outputs.
Exam focus: Only the selected output is asserted in ideal one-hot decoding. Common trap: All decoder outputs are not active simultaneously.
Formula / Key Relation
n inputs → up to 2^n decoded outputs.
Detailed Explanation
Correct Answer: C - 1 and 2 only Quick Concept Explanation A decoder maps an n-bit code to one of up to 2^n output lines, commonly as a one-hot output. Decoders are used in memory/address selection and can implement minterm-based logic functions. Key relation: n inputs → up to 2^n decoded outputs.Exam focus: Only the selected output is asserted in ideal one-hot decoding. Common trap: All decoder outputs are not active simultaneously. Statement-wise Verification Statement 1 - Correct.Decoder converts binary input into one-hot output activating only one output line.A decoder maps an n-bit code to one of up to 2^n…
Correct Answer: C - 1 and 2 only
Quick Concept Explanation
A decoder maps an n-bit code to one of up to 2^n output lines, commonly as a one-hot output. Decoders are used in memory/address selection and can implement minterm-based logic functions. Key relation: n inputs → up to 2^n decoded outputs.
Exam focus: Only the selected output is asserted in ideal one-hot decoding. Common trap: All decoder outputs are not active simultaneously.
Statement-wise Verification
Statement 1 - Correct. Decoder converts binary input into one-hot output activating only one output line. A decoder maps an n-bit code to one of up to 2^n output lines, commonly as a one-hot output.
Statement 2 - Correct. It can be used for function generation and memory addressing operations. Decoders are used in memory/address selection and can implement minterm-based logic functions.
Statement 3 - Incorrect. All outputs of decoder remain active simultaneously during operation. A conventional decoder asserts only the selected one-hot output (subject to active-high/low convention)
Core Concept
A decoder maps an n-bit code to one of up to 2^n output lines, commonly as a one-hot output. Decoders are used in memory/address selection and can implement minterm-based logic functions.
Formula / Key Relationship
n inputs → up to 2^n decoded outputs.
Why the Other Options Are Wrong
Option A is incorrect because it includes incorrect statement(s) 3 and omits correct statement(s) 2. Option B is incorrect because it includes incorrect statement(s) 3 and omits correct statement(s) 1. Option D is incorrect because it includes incorrect statement(s) 3.
Exam Shortcut / Approach
Only the selected output is asserted in ideal one-hot decoding.
Common Mistake
All decoder outputs are not active simultaneously.
Quick Revision
One-Hot Decoding and Addressing is linked with Decoders, Combinational Logic and Digital Electronics. Only the selected output is asserted in ideal one-hot decoding.
Quick Trick
Only the selected output is asserted in ideal one-hot decoding.
Why Other Options Are Wrong
Option A is incorrect because it includes incorrect statement(s) 3 and omits correct statement(s) 2. Option B is incorrect because it includes incorrect statement(s) 3 and omits correct statement(s) 1. Option D is incorrect because it includes incorrect statement(s) 3.
Common Mistake
All decoder outputs are not active simultaneously.
Exam Tip
Only the selected output is asserted in ideal one-hot decoding.
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