please for any one know ?

Discussion in 'General Electronics Chat' started by u-a-l, Jul 4, 2010.

  1. u-a-l

    Thread Starter New Member

    Jun 12, 2010
    27
    0
    i hope to answer me at the earliest
    i need simple circuit that i can used it to measure amplitude and phase angle of sinusoidal wave (i now their are some IC's can measure phase but i do not now how i used )
    NOTE : { i need amplitude and phase to calculate first , second, thread &....... harmonic of sinusoidal wave }
    so if any member have information about my quotation send it
     
  2. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    656
    A true sinusoidal wave has no harmonics. Do you mean that you need to measure amplitude and phase of each harmonic of a more complex waveform? If so, how do you plan to separate it into its harmonic components?
     
  3. russ_hensel

    Well-Known Member

    Jan 11, 2009
    818
    47
    A single wave has no phase, phase is a relative measure.
     
  4. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
    1,222
    What you need is perhaps a lock-in amplifier. A lock-in amplifier without the "lock-in" part is not so hard to build. A better word for the latter is perhaps a "synchronous detector"
     
  5. u-a-l

    Thread Starter New Member

    Jun 12, 2010
    27
    0
    u are right i have been mistake about sinsiodel waves i mean non sinusoid or complex waves .
    i need to determined the consist of complex waves
    (a)- fundamental wave
    (b)- a number of other sinusoidal waves whose frequencies are an integral multiple of the fundamental or basic frequency like 2f,3f and so on
    after all that i want to display it [harmonics]
    all that by using PIC 16fxxx
    so if u have answer please tell me
     
  6. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
  7. u-a-l

    Thread Starter New Member

    Jun 12, 2010
    27
    0
    how i get f(t) if i don't now the equation of complex waves
     
  8. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
  9. debjit625

    Well-Known Member

    Apr 17, 2010
    790
    186
    This is how it goes
    1)You can measure amplitude of a sine wave with Oscilloscope,ya with IC also I did it using a mcu but I dont rem.. any ASIC for this but their should be.
    2)You can measure phase between two or more AC signal in a circuit i.e two or more sine waves ,it can also be done with Oscilloscope.

    3)You get harmonic of sinusoidal wave only in mixed ac signal i.e mix of different ac signals and to measure these things you need spectrum analyzer.

    Good Luck
     
  10. u-a-l

    Thread Starter New Member

    Jun 12, 2010
    27
    0
    thank u i will read it now
    sorry i have anther quotation not about harmonic but about power factor if u have ways to measure it using pic ????
     
  11. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    656
    Google "FFT on a pic". FFT stands for "fast Fourier transform".
     
Loading...