1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Unit Step Function

  1. Jan 31, 2008 #1
    The question says to sketch the signal (t-4)[u(t-2)-u(t-4)].
    I know that the inner part is a delay of two and a delay of four, but I don't know what to do with the (t-4)...does it have anything to do with the slope?
     
  2. jcsd
  3. Jan 31, 2008 #2

    CEL

    User Avatar

    t-4 is a ramp with slope 1 passing by the point (4,0).
    u(t-2)-u(t-4) is a pulse of amplitude 1 extending from t=2 to t=4. It acts as a window over the function t-4.
     
  4. Feb 21, 2008 #3
    Sketch U(t-2). Then sketch U(t-4). Now subtract the two graphically. Does that help?
     
  5. Apr 11, 2010 #4
    hello! could someone please explain to me how u(t)-2u(t-2)+u(t-5) is sketched?
     
  6. Apr 12, 2010 #5
    +1 anyone?
     
  7. Apr 12, 2010 #6

    CEL

    User Avatar

    You should sum a step of amplitude 1, starting at t = 0, with a step of amplitude -2 starting at t = 2 and a step of amplitude 1 starting at t = 5.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Unit Step Function
Loading...