Interview Questions Answers.ORG
Interviewer And Interviewee Guide
Interviews
Quizzes
Home
Quizzes
Interviews Best Engineering Interviews:Aeronautical EngineeringAgricultural EngineeringApplied EngineeringAssociate EngineeringAutomobile EngineeringBio EngineeringBiomedical EngineerBiomedical EngineeringBuilding Services EngineeringCAD/CAE EngineerChemical EngineeringCivil EngineeringDAE Knitting EngineersDeputy Chief Financial OfficerDesktop EngineerDiesel MechanicElectrical EngineeringElectronics CommunicationsElectronics EngineeringEmbedded Software EngineerEnergy EngineeringEnergy Oil GasEngineeringGalvanizing EngineerIndustrial EngineeringInstrumentation EngineeringLaptop RepairerMachine Learning EngineerMachine OperatorMarine EngineeringMechanical EngineeringMechatronics EngineeringNetwork EngineerNuclear EngineeringPetroleum EngineeringPlant Reliability EngineerPlumberPre EngineeringProduction EngineerRF EngineerSystem EngineeringTextile Engineer
Copyright © 2018. All Rights Reserved
Electrical Engineering Interview Question:
Given the following FIFO and rules, how deep does the FIFO need to be to prevent underflowing or overflowing?
Submitted by: AdministratorGiven the following FIFO and rules, how deep does the FIFO need to be to prevent underflowing or overflowing?
RULES:
1) frequency(clk_A) = frequency(clk_B) / 4
2) period(en_B) = period(clk_A) * 100
3) duty_cycle(en_B) = 25%
Assume clk_B = 100MHz (10ns)
From (1), clk_A = 25MHz (40ns)
From (2), period(en_B) = 40ns * 400 = 4000ns, but we only output for 1000ns, due to (3), so 3000ns of the enable we are doing no output work.
Therefore, FIFO size = 3000ns/40ns = 75 entries.
Submitted by: Administrator
RULES:
1) frequency(clk_A) = frequency(clk_B) / 4
2) period(en_B) = period(clk_A) * 100
3) duty_cycle(en_B) = 25%
Assume clk_B = 100MHz (10ns)
From (1), clk_A = 25MHz (40ns)
From (2), period(en_B) = 40ns * 400 = 4000ns, but we only output for 1000ns, due to (3), so 3000ns of the enable we are doing no output work.
Therefore, FIFO size = 3000ns/40ns = 75 entries.
Submitted by: Administrator
Copyright 2007-2024 by Interview Questions Answers .ORG All Rights Reserved.
https://InterviewQuestionsAnswers.ORG.
https://InterviewQuestionsAnswers.ORG.