Static-1 Hazards in Circuits
10 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is a static-1 hazard?

  • When two input combinations differ in one variable and give a 0 output
  • When the output remains at 0 unexpectedly
  • When two input combinations differ in one variable and give a 1 output (correct)
  • When the output remains at a steady 1 as predicted
  • In the given example, why does F go to 0 for one unit time during a 1-0 transition on Z?

  • Because Z is changing from 1 to 0
  • Because X and Y are both set to 1
  • Because of a static-0 hazard
  • Because of the delay in the gate generating Z (correct)
  • What defines a static-0 hazard?

  • When there is a momentary 0 output during a transition in a differing input variable
  • When two input combinations differ in only one variable and give a 0 output (correct)
  • When there is an unexpected output of 1
  • When two input combinations differ in one variable and give a 1 output
  • How can a static-1 hazard be described?

    <p>A situation where two input combinations differ in one variable and both give a 1 output</p> Signup and view all the answers

    What type of hazard would exist in a properly designed two-level sum-of-products circuit?

    <p>Static-1 hazard</p> Signup and view all the answers

    How can static hazards be detected in a two-level sum-of-products or product-of-sums circuit?

    <p>By using a Karnaugh map</p> Signup and view all the answers

    What action can eliminate a static-0 hazard in a circuit?

    <p>Including an extra product term to cover the hazardous input pair</p> Signup and view all the answers

    In a product-of-sums (OR-AND) circuit, what type of hazard may exist?

    <p>Static-0 hazard</p> Signup and view all the answers

    What is the purpose of circling product terms on a Karnaugh map in relation to static hazards?

    <p>To detect potential static hazards</p> Signup and view all the answers

    Why is it important to add consensus terms in a two-level circuit to eliminate hazards?

    <p>To resolve conflicts between gates</p> Signup and view all the answers

    Study Notes

    Hazards in Digital Circuits

    • A static-1 hazard is a situation where the output of a digital circuit momentarily goes to 1 when it should remain at 0, or stays at 1 when it should go to 0, during a transition.

    Static-1 Hazard

    • F goes to 0 for one unit time during a 1-0 transition on Z because the transition on Z causes a brief glitch in the output F, resulting in a static-1 hazard.

    Static-0 Hazard

    • A static-0 hazard is a situation where the output of a digital circuit momentarily goes to 0 when it should remain at 1, or stays at 0 when it should go to 1, during a transition.

    Hazard Description

    • A static-1 hazard can be described as a situation where the output of a digital circuit exhibits a temporary pulse or glitch during a transition, resulting in an incorrect output.

    Hazards in Two-Level Circuits

    • In a properly designed two-level sum-of-products circuit, there are no hazards, as the output is guaranteed to be hazard-free.

    Hazard Detection

    • Static hazards can be detected in a two-level sum-of-products or product-of-sums circuit by analyzing the circuit's Karnaugh map or truth table.

    Eliminating Static-0 Hazards

    • Adding a redundant term to the circuit can eliminate a static-0 hazard, ensuring that the output remains stable during transitions.

    Product-of-Sums (OR-AND) Circuits

    • In a product-of-sums (OR-AND) circuit, a static-1 hazard may exist, causing the output to momentarily go to 1 during a transition.

    Karnaugh Map and Hazards

    • Circling product terms on a Karnaugh map helps to identify potential hazards in the circuit, allowing for the addition of consensus terms to eliminate them.

    Consensus Terms

    • Adding consensus terms in a two-level circuit is important to eliminate hazards, ensuring that the output remains stable and accurate during transitions.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Learn about static-1 hazards in digital circuits, where there is a possibility of the output producing a 0 glitch even though it is expected to be steady at 1. Explore the formal definition and understanding of static-1 hazards in circuit design.

    More Like This

    Digital Circuits Quiz
    16 questions

    Digital Circuits Quiz

    InfluentialYttrium avatar
    InfluentialYttrium
    CMOS Power Dissipation Explained
    24 questions
    Use Quizgecko on...
    Browser
    Browser