Digital Asic Design Engineer Interview Questions

53 digital asic design engineer interview questions shared by candidates

White-board diagram of a block with one input pin (+ clock), and one output pin. The input is a serial stream of data. The output =1 whenever the pattern "0110" has been seen on the serial data. Everything is synchronous to the clock input. Write the Verilog. Given the shortened time constraint for the interview, diagram the design solution. In addition to what you come up with, write a bubble diagram for an FSM solution.
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Digital ASIC Design Engineer

Interviewed at Qualcomm

3.8
Nov 7, 2014

White-board diagram of a block with one input pin (+ clock), and one output pin. The input is a serial stream of data. The output =1 whenever the pattern "0110" has been seen on the serial data. Everything is synchronous to the clock input. Write the Verilog. Given the shortened time constraint for the interview, diagram the design solution. In addition to what you come up with, write a bubble diagram for an FSM solution.

Was asked about basic protocols for PCIE. Basic questions on CDC. Types of violations that the CDC tools complain - eg: no_sync, combi logic before double sync, multi bit double syncing, re-convergence etc. Code async reset FF and sync reset FF. What are the dis/advantages of one over the other.
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ASIC Digital Design Engineer

Interviewed at Synopsys

3.8
Jun 16, 2018

Was asked about basic protocols for PCIE. Basic questions on CDC. Types of violations that the CDC tools complain - eg: no_sync, combi logic before double sync, multi bit double syncing, re-convergence etc. Code async reset FF and sync reset FF. What are the dis/advantages of one over the other.

Lots of questions about pmos and nmos (how to build nand gates, inverters), etc, how a pll works, how different things affect the output, transmission lines (parasitics, series vs parallel etc), flip flops, latches, op amps (designing lots of different op amps and discussing their rules)
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ASIC Digital Design Engineer, II

Interviewed at Synopsys

3.8
Oct 19, 2023

Lots of questions about pmos and nmos (how to build nand gates, inverters), etc, how a pll works, how different things affect the output, transmission lines (parasitics, series vs parallel etc), flip flops, latches, op amps (designing lots of different op amps and discussing their rules)

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