Describe some logic gates
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What happens to the speed of a transistor when the threshold voltage is raised?
What is static timing analysis? What is set up and hold time? What are the violations?
What is ASIC design flow?
1: behavioural (resume), verilog question, flipflop question 2: c coding, linked list deletion 3: behavioural, asked what I wanted out of this internship
Asked about basic digital logic questions and questions related to coding verilog/vhdl. question on the resume and the position.
STA concepts and problems, Implementation of all logic gates using muxes, clock gating circuits, inputs and outputs at every stage of ASIC and Physical Design flows
Why should we hire you?
Q: how will we setup a lineup? What are disadvantages if we use Filter as first stage. Q: What is EVM? Q: Scenario: Assume TX side gives B1UL output and RX is receiving B1DL/B3DL and B7DL. What parameters will you investigate? Q: Why does a device has nonlinearity? Q:worst return loss possible? Q: how would you match two points in smith chart? Which one would you choose among 4 types matching? Answer: first I will ask what BW is needed? Q: why do we want our system to be linear? What is intermod? How much intermod will increase with 1 dB increase in Pin? Channel leakage Q: How will you model non-linearity. You don’t have any data. Where does it come from? Q: how will you find IIP3? Q: how will you find noise floor of Spectrum Analyzer? Q: why do we see saw tooth noise floor at very low noise floor in Spectrum Analyzer? Q: how does line impedance change if you make it wider? How ideal line impedance can be expressed in terms of lumped model? Q: How does the wave travel in microstrip line? Which gnd do we want closer to coplanar microstrip line – gnd below the trace or the gnd on the same plane? Q: how will constellation diagram change if we 1. increase gain in I component. 2. Introduce Phase noise.
RC circuit voltage and current plots, inductive load circuit, buck converter analysis, complex circuit analysis, low pass filter behavior, ADC related calculations.
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