measure peak to peak voltage?? how

Discussion in 'Electronic Design' started by 5hinka, Sep 21, 2004.

  1. 5hinka

    5hinka Guest

    Hi
    I have sinusoidal or triangle signal.
    I need to measure peak to peak voltage.
    How Can i do it?? I know that i should
    use some op amps, resistor, diods,
    but cannot find any design.
    Could You help me??
    Some links mayby??
    Greetings
    5hinka
    5hinka, Sep 21, 2004
    #1
    1. Advertising

  2. 5hinka

    John Fields Guest

    On Tue, 21 Sep 2004 20:32:33 +0200, "5hinka" <>
    wrote:

    >Hi
    >I have sinusoidal or triangle signal.
    >I need to measure peak to peak voltage.
    >How Can i do it??


    ---
    1. Oscilloscope

    2. True RMS voltmeter.
    For an infinitely repeating sinusoidal signal multiply what your
    meter says by 2.828. For an infinitely repeating triangle, 3.464.

    --
    John Fields
    John Fields, Sep 21, 2004
    #2
    1. Advertising

  3. 5hinka

    5hinka Guest

    > >Hi
    > >I have sinusoidal or triangle signal.
    > >I need to measure peak to peak voltage.
    > >How Can i do it??

    >
    > ---
    > 1. Oscilloscope
    >
    > 2. True RMS voltmeter.
    > For an infinitely repeating sinusoidal signal multiply what your
    > meter says by 2.828. For an infinitely repeating triangle, 3.464.
    >
    > --
    > John Fields



    Ehh
    I need to include it into my project.
    Oscilloscope is too big ;-))
    5hinka, Sep 21, 2004
    #3
  4. 5hinka

    Rolavine Guest

    >Subject: Re: measure peak to peak voltage?? how
    >From: "5hinka"
    >Date: 9/21/2004 1:09 PM Pacific Daylight Time
    >Message-id: <ciq20b$fp9$>
    >
    >> >Hi
    >> >I have sinusoidal or triangle signal.
    >> >I need to measure peak to peak voltage.
    >> >How Can i do it??

    >>
    >> ---
    >> 1. Oscilloscope
    >>
    >> 2. True RMS voltmeter.
    >> For an infinitely repeating sinusoidal signal multiply what your
    >> meter says by 2.828. For an infinitely repeating triangle, 3.464.
    >>
    >> --
    >> John Fields

    >
    >
    >Ehh
    >I need to include it into my project.
    >Oscilloscope is too big ;-))
    >

    You could use peak detectors made from op amps, positive and negative, and then
    measure the dc voltage between them with a volt meter. There are circuits that
    work in the 'Op amp Cookbook'.

    Or, how about the previous suggestion to just multiply the AC rms measured on a
    meter?

    Rocky
    Rolavine, Sep 21, 2004
    #4
  5. 5hinka

    Tam/WB2TT Guest

    "5hinka" <> wrote in message
    news:cipsaf$kdv$...
    > Hi
    > I have sinusoidal or triangle signal.
    > I need to measure peak to peak voltage.
    > How Can i do it?? I know that i should
    > use some op amps, resistor, diods,
    > but cannot find any design.
    > Could You help me??
    > Some links mayby??
    > Greetings
    > 5hinka


    A clamping circuit, followed by a rectifier. However you will have to take
    into account the two diode drops.

    Tam
    Tam/WB2TT, Sep 21, 2004
    #5
  6. 5hinka

    John Fields Guest

    On Tue, 21 Sep 2004 22:09:37 +0200, "5hinka" <>
    wrote:

    >> >Hi
    >> >I have sinusoidal or triangle signal.
    >> >I need to measure peak to peak voltage.
    >> >How Can i do it??

    >>
    >> ---
    >> 1. Oscilloscope
    >>
    >> 2. True RMS voltmeter.
    >> For an infinitely repeating sinusoidal signal multiply what your
    >> meter says by 2.828. For an infinitely repeating triangle, 3.464.
    >>
    >> --
    >> John Fields

    >
    >
    >Ehh
    >I need to include it into my project.
    >Oscilloscope is too big ;-))


    ---
    You need a precision rectifier followed up by a peak reading filter
    with a gain of 2.

    --
    John Fields
    John Fields, Sep 22, 2004
    #6
  7. 5hinka

    Ken Smith Guest

    In article <cipsaf$kdv$>,
    5hinka <> wrote:
    >Hi
    >I have sinusoidal or triangle signal.

    Whats the frequency?

    >I need to measure peak to peak voltage.
    >How Can i do it?? I know that i should
    >use some op amps, resistor, diods,


    You didn't say how exact you want the measurement. I'll assume you want
    it fairly good and that the frequency is fairly low.

    I think you may want a fast comparitor or two. If you are after the
    peak-peak, you basically want the circuit to measure the voltage that is
    there for a very short time.

    The purpose of the comparitor is to compare the output with the input. If
    the input ever exceeds the output, you need to raise the output. If not,
    you need to lower it.

    You may need a pair of comparitors, because you need to find the pos.
    and neg. peaks to subtract for the p-p measurement.
    --
    --
    forging knowledge
    Ken Smith, Sep 22, 2004
    #7
  8. 5hinka

    Ken Smith Guest

    In article <>,
    Tam/WB2TT <t-tammaru@c0mca$t.net> wrote:
    >
    >"5hinka" <> wrote in message
    >news:cipsaf$kdv$...
    >> Hi
    >> I have sinusoidal or triangle signal.
    >> I need to measure peak to peak voltage.
    >> How Can i do it?? I know that i should
    >> use some op amps, resistor, diods,
    >> but cannot find any design.
    >> Could You help me??
    >> Some links mayby??
    >> Greetings
    >> 5hinka

    >
    >A clamping circuit, followed by a rectifier. However you will have to take
    >into account the two diode drops.


    Or, make an recifier with no drop.

    --
    --
    forging knowledge
    Ken Smith, Sep 22, 2004
    #8
  9. 5hinka

    Jim Thompson Guest

    On Wed, 22 Sep 2004 00:32:33 +0000 (UTC),
    (Ken Smith) wrote:

    >In article <>,
    >Tam/WB2TT <t-tammaru@c0mca$t.net> wrote:
    >>
    >>"5hinka" <> wrote in message
    >>news:cipsaf$kdv$...
    >>> Hi
    >>> I have sinusoidal or triangle signal.
    >>> I need to measure peak to peak voltage.
    >>> How Can i do it?? I know that i should
    >>> use some op amps, resistor, diods,
    >>> but cannot find any design.
    >>> Could You help me??
    >>> Some links mayby??
    >>> Greetings
    >>> 5hinka

    >>
    >>A clamping circuit, followed by a rectifier. However you will have to take
    >>into account the two diode drops.

    >
    >Or, make an recifier with no drop.
    >


    See "FullWaveRectifier.pdf" on the SED/Schematics page of my website
    for a starting point (note, there are four pages).

    ISTR that I posted a version that was peak-to-peak on a.b.s.e, but I
    can't locate it right now.

    ...Jim Thompson
    --
    | James E.Thompson, P.E. | mens |
    | Analog Innovations, Inc. | et |
    | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
    | Phoenix, Arizona Voice:(480)460-2350 | |
    | E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
    | http://www.analog-innovations.com | 1962 |

    I love to cook with wine. Sometimes I even put it in the food.
    Jim Thompson, Sep 22, 2004
    #9
  10. 5hinka

    Jim Thompson Guest

    On Tue, 21 Sep 2004 17:48:37 -0700, Jim Thompson
    <> wrote:

    [snip]
    >See "FullWaveRectifier.pdf" on the SED/Schematics page of my website
    >for a starting point (note, there are four pages).
    >
    >ISTR that I posted a version that was peak-to-peak on a.b.s.e, but I
    >can't locate it right now.
    >
    > ...Jim Thompson


    See......

    Newsgroups: alt.binaries.schematics.electronic
    Subject: Peak-to-Peak Detector (S.E.D) - Peak-to-Peak-Detector.pdf
    Message-ID: <>

    ...Jim Thompson
    --
    | James E.Thompson, P.E. | mens |
    | Analog Innovations, Inc. | et |
    | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
    | Phoenix, Arizona Voice:(480)460-2350 | |
    | E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
    | http://www.analog-innovations.com | 1962 |

    I love to cook with wine. Sometimes I even put it in the food.
    Jim Thompson, Sep 22, 2004
    #10
  11. 5hinka

    Ban Guest

    5hinka wrote:
    > Hi
    > I have sinusoidal or triangle signal.
    > I need to measure peak to peak voltage.
    > How Can i do it?? I know that i should
    > use some op amps, resistor, diods,
    > but cannot find any design.
    > Could You help me??


    Below is a nice peak detector circuit, it is fast enough for audio and quite
    precise. The negative half wave is done by another one with the diodes
    inverted. the final result is done by subtracting the 2 values. The
    pushbutton switch is to reset, can maybe replaced by a resistor for
    continuous reading.

    ___ ___
    o-|___|-+------+-|___|---------------------------+
    10k | | 10k |
    | - |
    | |\ ^ BAV99 |
    +-|-\ | ___ |\ |
    | >-+---|<--|___|-+----+---------|+\ |
    +-|+/ 100 | | | >-+
    | |/ --- o | +-|-/ |
    | TL074 --- |=| | |/ |
    | 1n| o | +------+
    | | |
    +--------------------+----+
    |
    ===
    GND
    created by Andy┬┤s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de
    view\font\fixed
    --
    ciao Ban
    Bordighera, Italy
    Ban, Sep 22, 2004
    #11
  12. I read in sci.electronics.design that Ban <> wrote (in
    <Zg94d.365296$>) about 'measure peak to peak
    voltage?? how', on Wed, 22 Sep 2004:
    >Below is a nice peak detector circuit, it is fast enough for audio and
    >quite precise. The negative half wave is done by another one with the
    >diodes inverted. the final result is done by subtracting the 2 values.
    >The pushbutton switch is to reset, can maybe replaced by a resistor for
    >continuous reading.


    You missed off the output terminals.
    --
    Regards, John Woodgate, OOO - Own Opinions Only.
    The good news is that nothing is compulsory.
    The bad news is that everything is prohibited.
    http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
    John Woodgate, Sep 22, 2004
    #12
  13. On Tue, 21 Sep 2004 20:32:33 +0200, the renowned "5hinka"
    <> wrote:

    >Hi
    >I have sinusoidal or triangle signal.
    >I need to measure peak to peak voltage.
    >How Can i do it?? I know that i should
    >use some op amps, resistor, diods,
    >but cannot find any design.
    >Could You help me??
    >Some links mayby??
    >Greetings
    >5hinka


    If you know the waveform in advance, just measure the average voltage
    (precision rectifier- easy up to a few kHz anyway) and low-pass filter
    and scale the output voltage correspondingly.


    Best regards,
    Spehro Pefhany
    --
    "it's the network..." "The Journey is the reward"
    Info for manufacturers: http://www.trexon.com
    Embedded software/hardware/analog Info for designers: http://www.speff.com
    Spehro Pefhany, Sep 22, 2004
    #13
  14. Ad633 low cost multiplier with one input fed DC scaled to Jim's above
    mentioned constants, the other input fed with your input wave
    followed by a normal cheap AC panel voltmeter?

    AD633 has transfer function of (x1-x2) * (y1-y2)/10 +z
    where x and y are the differential inputs.

    Just a goofy idea that would drive professors who have never seen a
    Gilbert multiplier batty.

    Steve Roberts
    Steve Roberts, Sep 22, 2004
    #14
  15. 5hinka

    BobGardner Guest

    They always told me 'there is no such thing as peak to peak voltage'. At one
    instant, there is a positive peak voltage, and at some other instant, there is
    a negative peak voltage, but the voltage is a function, and only has one value
    at an instant in time. Now lets argue about whether the product of rms voltage
    and rms current is rms power or average power.....
    BobGardner, Oct 18, 2004
    #15
  16. 5hinka

    Jim Thompson Guest

    On 18 Oct 2004 20:57:18 GMT, a (BobGardner) wrote:

    >They always told me 'there is no such thing as peak to peak voltage'. At one
    >instant, there is a positive peak voltage, and at some other instant, there is
    >a negative peak voltage, but the voltage is a function, and only has one value
    >at an instant in time. Now lets argue about whether the product of rms voltage
    >and rms current is rms power or average power.....


    Track down, on a.b.s.e, the following post....

    Peak-to-Peak Detector (S.E.D) - Peak-to-Peak-Detector.pdf
    From: Jim Thompson Date: Tue, 21 Sep 2004 18:18:54 -0700 Size: 30.9k

    ...Jim Thompson
    --
    | James E.Thompson, P.E. | mens |
    | Analog Innovations, Inc. | et |
    | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
    | Phoenix, Arizona Voice:(480)460-2350 | |
    | E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
    | http://www.analog-innovations.com | 1962 |

    I love to cook with wine. Sometimes I even put it in the food.
    Jim Thompson, Oct 18, 2004
    #16
  17. 5hinka

    Rich Grise Guest

    On Mon, 18 Oct 2004 15:58:32 -0700, Jim Thompson wrote:

    > On 18 Oct 2004 20:57:18 GMT, a (BobGardner) wrote:
    >
    >>They always told me 'there is no such thing as peak to peak voltage'. At one
    >>instant, there is a positive peak voltage, and at some other instant, there is
    >>a negative peak voltage, but the voltage is a function, and only has one value
    >>at an instant in time. Now lets argue about whether the product of rms voltage
    >>and rms current is rms power or average power.....

    >
    > Track down, on a.b.s.e, the following post....
    >
    > Peak-to-Peak Detector (S.E.D) - Peak-to-Peak-Detector.pdf
    > From: Jim Thompson Date: Tue, 21 Sep 2004 18:18:54 -0700 Size: 30.9k
    >


    I get a feeling that bobgardner just wants to start a discussion over
    whether the term "peak-to-peak" voltage even has meaning in the context of
    a time-variant function.

    In the interim, I've found the answer to the angels on a head of a pin
    dilemma - an infinite number can dance on the head of a pin, since they're
    imaginary and don't take up any space. ;-)

    Cheers!
    Rich
    Rich Grise, Oct 19, 2004
    #17
  18. 5hinka

    Ken Smith Guest

    In article <>,
    BobGardner <> wrote:
    >They always told me 'there is no such thing as peak to peak voltage'.


    Who are they and why do they always say these things.


    Peak to peak voltage:

    (a) The most positive voltage minus the most negitive voltage seen within
    the measurement time. This is what is normally meant by peak to peak.

    (b) The most positive minus the most negitive voltage that will ever be
    seen. This is what you use when designing for overvoltages etc.

    (c) The range of voltage that the signal spends 90% or 99% of its time
    between. This is used when refering to noise.

    (d) The same as any of the above with after the removal of some low
    frequency components. This is used when measuring the fur on a waveform.

    RMS voltage:

    You the the voltage at each instant or time square it, find the average of
    the squared value and the take the squareroot. This is very hand for
    rating things like lightbulbs that don't react quickly to the input
    voltage.

    Peak to peak current:

    (the same as the above with s/voltage/current/ )

    RMS current:

    (See RMS voltage )

    Peak to peak power:

    (a) Peak to peak voltage times the peak to peak current. This is used to
    get a number that impresses the uninformed.

    (b) In audio amplifiers this is the power produced when the pull up
    transistor first shorts, then blows open and then the pull donw transistor
    does the same. This is how many audio amplifiers are rated.

    (c) The peak power caused by the positive swing plus the peak power caused
    by the negitive swing. This is an almost honest measure of the pulsed
    output handling ability of a circuit, so it is never used.

    RMS power:

    (a) Take the instantanious power square it, average the squares and then
    squareroot the average. This is the RMS power but no-one ever means this
    when they say RMS power.

    (b) Average power misnamed RMS power. This is what most people mean if
    they say RMS power.

    (c) A completely fictional number created in the marketing department.




    --
    --
    forging knowledge
    Ken Smith, Oct 20, 2004
    #18
  19. 5hinka

    legg Guest

    On 18 Oct 2004 20:57:18 GMT, a (BobGardner) wrote:

    >They always told me 'there is no such thing as peak to peak voltage'. At one
    >instant, there is a positive peak voltage, and at some other instant, there is
    >a negative peak voltage, but the voltage is a function, and only has one value
    >at an instant in time. Now lets argue about whether the product of rms voltage
    >and rms current is rms power or average power.....


    non sequitur

    Look it up the definition.

    Also check "peak and random deviation" (PARD).

    RL
    legg, Oct 20, 2004
    #19
    1. Advertising

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. WAZ

    Peak to Peak

    WAZ, Aug 22, 2006, in forum: Electronic Basics
    Replies:
    73
    Views:
    2,310
    John Fields
    Sep 21, 2006
  2. stevo
    Replies:
    12
    Views:
    1,015
  3. Teddy

    Peak to peak noise detection circuit

    Teddy, Apr 27, 2004, in forum: Electronic Design
    Replies:
    3
    Views:
    690
  4. Harry Dellamano

    What is Peak to Peak?

    Harry Dellamano, Feb 3, 2005, in forum: Electronic Design
    Replies:
    7
    Views:
    1,259
    Tony Williams
    Feb 8, 2005
  5. Simmon

    Peak voltage output for each stage, voltage ramp input

    Simmon, Mar 2, 2014, in forum: General Electronics Chat
    Replies:
    2
    Views:
    101
    OLIVE2222
    Mar 3, 2014
Loading...

Share This Page