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VLSI Interview Questions and Answers

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VLSI Interview Questions & Answers


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Questions Question: where we use VLSI?KAISA QUISTION askin intervie
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Questions Question: interview based question for VLSI.
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Questions Question: For an AND-OR implementation of a two input Mux, how do you test for Stuck-At-0 and Stuck-At-1 faults at the internal nodes? (You can expect a circuit with some redundant logic)
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Questions Question: What?s the difference between Testing & Verification?
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Questions Question: How can you model a SRAM at RTL Level?
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Questions Question: In a SRAM layout, which metal layers would you prefer for Word Lines and Bit Lines? Why?
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Questions Question: Give a big picture of the entire SRAM Layout showing your placements of SRAM Cells, Row Decoders, Column Decoders, Read Circuit, Write Circuit and Buffers
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Questions Question: Draw the timing diagram for a SRAM Read. What happens if we delay the enabling of Clock signal?
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Questions Question: What?s the critical path in a SRAM?
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Questions Question: How does the size of PMOS Pull Up transistors (for bit & bit- lines) affect SRAM?s performance?
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Questions Question: Approximately, what were the sizes of your transistors in the SRAM cell? How did you arrive at those sizes?
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Questions Question: Draw the SRAM Write Circuitry
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Questions Question: What happens if we use an Inverter instead of the Differential Sense Amplifier?
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Questions Question: Draw the Differential Sense Amplifier and explain its working. Any idea how to size this circuit? (Consider Channel Length Modulation)
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Questions Question: Draw a 6-T SRAM Cell and explain the Read and Write operations
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Questions Question: For a NMOS transistor acting as a pass transistor, say the gate is connected to VDD, give the output for a square pulse input going from 0 to VDD
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Questions Question: Why don?t we use just one NMOS or PMOS transistor as a transmission gate?
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Questions Question: Give the logic expression for an AOI gate. Draw its transistor level equivalent. Draw its stick diagram
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Questions Question: Given a layout, draw its transistor level circuit. (I was given a 3 input AND gate and a 2 input Multiplexer. You can expect any simple 2 or 3 input gates)
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Questions Question: In the design of a large inverter, why do we prefer to connect small transistors in parallel (thus increasing effective width) rather than lay out one transistor with large width?
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Latest 10 Answers
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