Good-day all. Please I Urgently Need 100 kHz Functin Generator Circuit

Discussion in 'The Projects Forum' started by nma, Feb 1, 2016.

  1. nma

    Thread Starter New Member

    Feb 1, 2016
    15
    0
    Good-day all. Please I urgently need help with my project. I am working on a signal generator that can generate three wave forms: Square wave, triangular wave and sinewave. The maximum frequency is 100kHz. I used op-amp (TL072). The square is on coming out well.
     
  2. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    there are chips designed for that, look up MAX038, XR2206, and such.
     
  3. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,980
    744
    Try making a Wien oscillator with your op amp,..
     
  4. atferrari

    AAC Fanatic!

    Jan 6, 2004
    2,648
    762
    The help you require is going to cost you dearly because it will require previous adivination to know what circuit you did implement.

    Just in case, providing a schematic, the cost is much much lower. Please reconsider.

    Ah, if urgent, cost goes high again.
     
  5. AnalogKid

    Distinguished Member

    Aug 1, 2013
    4,534
    1,251
    I think what AT is trying to say is - no schematic, no answers.

    ak
     
  6. OBW0549

    Well-Known Member

    Mar 2, 2015
    1,308
    884
    Without seeing a schematic diagram of your design, complete with all components and connections, we can't do much to help you.

    I can take one wild guess, however: if you're trying to use a section of a TL072 as a comparator to get your square wave output, be aware that at 100 kHz your square wave won't be very "square"; it will be more like a distorted, asymmetrical trapezoid because of the TL072's limited slew rate (typically 13 V/μS ). If you want a good, clean square wave use a proper comparator (LM339, LT1116, etc.) instead.
     
  7. nma

    Thread Starter New Member

    Feb 1, 2016
    15
    0
    Thank you very much for the response. I tried to use the MC and MAX038 but could not get it in my area. Any alternative I would not mind.
     
  8. nma

    Thread Starter New Member

    Feb 1, 2016
    15
    0
    Thanks for the response. I did not understand the response first but now clear. This is the circuit:

    upload_2016-2-1_19-51-47.png
     
  9. nma

    Thread Starter New Member

    Feb 1, 2016
    15
    0
    Thanks for the explanation. I have sent the schematic.
     
  10. nma

    Thread Starter New Member

    Feb 1, 2016
    15
    0
    Thanks for the response. This is my schematic:

    upload_2016-2-1_19-54-50.png
     
  11. nma

    Thread Starter New Member

    Feb 1, 2016
    15
    0
    Infact OB, I thought as much that TL072 could be the problem because of the slew rate. Please also check my other components because I am due to submit my work on wednesday.
     
  12. dl324

    Distinguished Member

    Mar 30, 2015
    3,242
    619
    If this is a school project for which you will be graded, that's considered homework and should be posted in the Homework Help forum so responders won't simply give you answers.
     
  13. nma

    Thread Starter New Member

    Feb 1, 2016
    15
    0
    Please these are also the triangular wave and sine wave circuits below. Any corrections will be highly appreciated.

    triangular schematic from a simulation is
    upload_2016-2-1_20-51-4.png upload_2016-2-1_20-51-4.png

    sine wave from electronic workbench:

    upload_2016-2-1_20-53-50.png
     
Loading...