Re: 1 million amp gone astray?

Discussion in 'Computer Information' started by Paul, Dec 1, 2010.

  1. Paul

    Paul Guest

    Robert Baer wrote:
    > This is what i just made and measured.
    > What the heck is going on?
    > Where did the current go?
    > Input section is OK; current from voltage source X shows as an analog
    > voltage at point Y and computes correctly.
    > But the summing junction Z value implies a specific current from Y to
    > Z that is not equal to that from Z to the -15V rail.
    > Have a capacitor from Z to ground to prevent oscillation.
    >
    > +------------------------------------------
    > | 100K |
    > | +---/\/\--+ |
    > | 150K | 2(\ | Y |
    > X--+--/\/\---+--( \ ---+---+ |
    > +--( / 1 | |
    > | 3(/ \ |
    > G 100K / 100K |
    > \ 6(\ |
    > | G--/\/---( \ -+
    > Z +-----------( / 7
    > | 5(/
    > OPA2277 \
    > / 150K
    > \ Meas: X = 3.0V
    > | Y = 2.0V (so far so good)
    > V Z = 0.0V (nonsequitor)
    > +15


    You should try out the analog simulator that linear.com
    used to offer (SwitcherCAD), and then you can do the whole
    circuit on the computer. If any voltages or currents are infinite,
    there is no crater left in your living room. You'd use
    an "ideal" opamp, as there is no need to simulate with
    a more realistic model.

    (LTSpice - apparently a name change from the old SwitcherCAD)
    http://www.linear.com/designtools/software/switchercad.jsp

    Paul
     
    Paul, Dec 1, 2010
    #1
    1. Advertising

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. MayB

    Astray on the Links

    MayB, Dec 10, 2003, in forum: Computer Support
    Replies:
    11
    Views:
    748
    William Poaster
    Dec 11, 2003
  2. MayB

    Still astray on the Links!

    MayB, Dec 13, 2003, in forum: Computer Support
    Replies:
    9
    Views:
    513
    Max Quordlepleen
    Dec 13, 2003
  3. Jackie Woolford

    e-mail gone astray

    Jackie Woolford, Dec 17, 2005, in forum: Computer Support
    Replies:
    5
    Views:
    454
    Mike Easter
    Dec 17, 2005
  4. Ferd Berfle

    50 million refugees have gone missing

    Ferd Berfle, Nov 16, 2010, in forum: Computer Support
    Replies:
    3
    Views:
    496
    Bucky Breeder
    Nov 16, 2010
  5. Baron

    Re: 1 million amp gone astray?

    Baron, Dec 1, 2010, in forum: Computer Information
    Replies:
    0
    Views:
    497
    Baron
    Dec 1, 2010
Loading...

Share This Page