Function Generator

Discussion in 'Embedded Systems and Microcontrollers' started by marims, Jan 27, 2008.

  1. marims

    Thread Starter Member

    Jan 27, 2008
    15
    0
    Hi Everyone

    I am planning to build a PC Controlled Function Generator

    Output Waveforms are : Square , Sine and Triangle

    Output Voltage : 0 to 10V

    Output Frequency : 1 MHZ

    Can any one suggest me the Right controller and associated hardware requirements please.
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,140
    1,789
    What kind of circuit do you think will source and sink that much current. Why do you need a square wave with that much power? Are you sure this is really a requirement? It sounds fishy?
     
  3. marims

    Thread Starter Member

    Jan 27, 2008
    15
    0
    Hi Papabravo

    This is my first ever thread on any forum, I was a bit nervous while creating
    the thread. I have corrected it. Your Suggestions are welcome.
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    The easy way out is to get a MAX038 - http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1257 - which has those outputs. The ic is not in production, so it could be interesting to find one.

    The other way out is to make an oscillator that outputs a sine wave at 1 MHz and derrive the triangle and square waves from it.
     
  5. Papabravo

    Expert

    Feb 24, 2006
    10,140
    1,789
    With a Digital to Analog Converter and a bit of programming you should be able to get up to 1 MHz.
     
  6. atferrari

    AAC Fanatic!

    Jan 6, 2004
    2,648
    762
    With an 8-bit R-2R network and a simple 16F84A, I managed to produce quite a good sinewave.

    In fact, they are two sine generators fed by the same clock able to vary the phase against each other and of course frequency.

    Still to solve is a constant output after the filter. Tried many things but no success.
     
  7. marims

    Thread Starter Member

    Jan 27, 2008
    15
    0
    Hi

    Thanks for your response,

    I have come across DDS waveform generator from Analog devices,the part number is AD9833,i am planning to build my generator using this progammable chip. my other requirements are

    1) How to generate a arbirary waveforms, is a PSOC controller can be used ?
    2) A good amplification circuitry with operating range of 0.5V to 10V with multiple steps, any IC sugesstion for software controlled gain?


    Please suggest
     
  8. Stef_mcu

    New Member

    Mar 10, 2009
    1
    0
    Marims,

    Do you have an PCB because I ask that the PCB is very complex. I try the PCB in double sided but what about analog and digital grounds?
    Are this grounds together in one star junction?
     
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