Voltage to frequency converter

Discussion in 'General Electronics Chat' started by pranav_shenoy, Feb 17, 2015.

  1. pranav_shenoy

    Thread Starter New Member

    Feb 17, 2015
    12
    0
    Can anyone send me circuit diagrams and working of voltage to frequency converter and frequency to voltage converter? Thank you in advance:)
     
  2. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    Look up the LM331 - the datasheet details how to use it in both configurations.
     
  3. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,995
    745
    Lm2907 F to V chip.
     
  4. Shabbir_Ahmed

    New Member

    Feb 17, 2015
    8
    2
    Hi
    Voltage to frequency converter can also be called a voltage controlled oscillator.
    refer the wikipedia page for more details...................http://en.wikipedia.org/wiki/Voltage-controlled_oscillator
    or you can refer this link too for circuit diagrams..................http://circuitsplanet.blogspot.in/2015/02/voltage-controlled-oscillator.html
    for FVC...................................................................................http://circuitsplanet.blogspot.in/2015/02/frequency-to-voltage-converter.html
     
  5. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    I think you better talk some more what you want to do for that F to V then when the members give you the solution may easily to get to target.
     
  6. JWHassler

    Member

    Sep 25, 2013
    201
    33
    I'm with him.... the frequency-range that you need will have a huge impact on the topology/effort required
     
  7. Shabbir_Ahmed

    New Member

    Feb 17, 2015
    8
    2
    What range of frequency are you looking for?
     
  8. ian field

    Distinguished Member

    Oct 27, 2012
    4,415
    784
    If you want dead simple - just use the 2-transistor astable multivibrator.

    The 2 high value resistors that feed the transistor bases and form the R part of the CR timing networks usually go to Vcc in a fixed frequency implementation, You can also common those 2 resistors and take them to Vcc through a pot that can vary the frequency - or you can return the tops of those 2 resistors to a voltage that controls the frequency.
     
  9. ian field

    Distinguished Member

    Oct 27, 2012
    4,415
    784
    The 331 is also equivalent to an RC145...something or other.

    Sharp made a version. AFAICR; "331" fits into their longer part number.

    These chips were all the rage in the early days of multisync VGA - I haven't checked whether any of them are still obtanium nowadays.
     
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