Connect with us

quadrature singal

Discussion in 'General Electronics Discussion' started by westpoint, Feb 19, 2012.

Scroll to continue with content
  1. westpoint

    westpoint

    5
    0
    Feb 19, 2012
    Hi folks, I am working on a big project. One of the most important steps is to produce sin and cos (quadrature singal) singal. The singal must be low-noise and the frequency of the two singals can be controlled by computer, i.e.

    computer (gives a votalge V)--> circuit --> analog sin(A*V*t) and cos(A*V*t)

    the votalge given by the computer is between -10 and 10 V. And A is some constant factor determined by the circuit.

    can we do that?:)
     
  2. twister

    twister

    172
    7
    Feb 12, 2012
    Be careful not to produce too much sin, :eek: you will have to ask Jesus to forgive you, if you want to go to heaven. ha
    Sine waves I know. Cosines, not much. Someone smarter than me will have to help you on that. :D
     
  3. GonzoEngineer

    GonzoEngineer

    321
    2
    Dec 2, 2011
    Are you a student at Westpoint?
     
  4. Laplace

    Laplace

    1,252
    184
    Apr 4, 2010
  5. westpoint

    westpoint

    5
    0
    Feb 19, 2012
    The expected frequency is 20KHz and it should be very stable with less than 1Hz noise. And A is just some factor, so A*V is around 20KHz.
     
  6. westpoint

    westpoint

    5
    0
    Feb 19, 2012
    No, I'm a graduate student of Physics.
     
  7. Laplace

    Laplace

    1,252
    184
    Apr 4, 2010
    So the real problem is not quadrature generation but rather building a very stable voltage-controlled oscillator. From your answer I gather that the VCO signal is not sin(A*V*t) but instead sin(A*{K+V}*t)=20khz where K>>V.
     
  8. GonzoEngineer

    GonzoEngineer

    321
    2
    Dec 2, 2011
    Whew! I was worried there for a moment.:D

    BTW....it is spelled signal.:cool:
     
  9. Laplace

    Laplace

    1,252
    184
    Apr 4, 2010
    Rats! I was fascinated by the prospect of low-noise sin with SinGal, and the magnitude of the forgiveness I would seek.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-