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Re: Audio Generator or Function Generator? Which to get?

Newsgroups sci.electronics.design
Subject Re: Audio Generator or Function Generator? Which to get?
References (2 earlier) <oa8cno$1c3m$1@gioia.aioe.org> <8fdec2a5-4ebc-4c77-a1af-c35826ba72a0@googlegroups.com> <oabavn$18uf$3@gioia.aioe.org> <1b5646e2-75db-43ad-96ec-e5d18c21452e@googlegroups.com> <op.yw77pr1gwei6gd@fx-6300>
From "David Eather" <eather@tpg.com.au>
Message-ID <op.yw77v9y2wei6gd@fx-6300> (permalink)
Date 2017-03-17 13:56 +1000

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On Fri, 17 Mar 2017 13:56:13 +1000, David Eather <eather@tpg.com.au> wrote:

> On Wed, 15 Mar 2017 22:39:48 +1000, <tabbypurr@gmail.com> wrote:
>
>> On Wednesday, 15 March 2017 12:10:36 UTC, Martin Brown  wrote:
>>> On 14/03/2017 13:58, tabbypurr wrote:
>>> > On Tuesday, 14 March 2017 09:22:05 UTC, Martin Brown  wrote:
>>> >
>>> >> There used to be old school analogue function generator chips that
>>> >> made a triangle wave and then applied diode shaping to get a
>>> >> pseudo-sine wave. HP made one design implementation that was
>>> >> surprisingly good. Intersils 8038 was the poor mans alternative for
>>> >> DIY.
>>> >>
>>> >>  
>>> http://www.intersil.com/content/dam/intersil/documents/icl8/icl8038.pdf
>>> >
>>> >>
>>> > I built one of those decades ago. What a car crash. The wave forms
>>> > were hopeless. I don't remember the details to know why, I presume
>>> > the problem was the 8038 though.
>>>
>>> It was never anything like as good as a Wein bridge sine wave but it  
>>> was
>>> good for about 0.5% THD if you trimmed it properly. I suspect
>>> manufacturing tolerances made it inconsistent batch to batch.
>>>
>>> Cute chip in its day, but that was a long time ago.
>>
>> I doubt it managed 50%, let alone 0.5%. It had 3 outputs, sine square &  
>> triangle. At some frequencies one output looked more like one of the  
>> others should, and the others were just a mess. It was dire, and yes I  
>> followed the advised circuit. It might manage 0.5% at some frequency,  
>> but as a sig gen it was a real failure. If I ever get the time I'll  
>> look at it again one day, it's on a shelf somewhere.
>>
>>
>> NT
>
> there were a few kits designed with it - they really did manage 0.5%
>


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Thread

Audio Generator or Function Generator? Which to get? oldschool@tubes.com - 2017-03-13 02:26 -0600
  Re: Audio Generator or Function Generator? Which to get? Colin Horsley <horsley-spam@westnet.com.au> - 2017-03-13 20:20 +1100
  Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-13 02:20 -0700
  Re: Audio Generator or Function Generator? Which to get? Jasen Betts <jasen@xnet.co.nz> - 2017-03-13 09:32 +0000
    Re: Audio Generator or Function Generator? Which to get? Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2017-03-14 09:22 +0000
      Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-14 03:11 -0700
      Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-14 06:58 -0700
        Re: Audio Generator or Function Generator? Which to get? Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2017-03-15 12:10 +0000
          Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-15 05:39 -0700
            Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-15 17:41 -0700
              Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-15 19:13 -0700
                Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-15 19:23 -0700
                Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-15 19:32 -0700
                Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-15 19:44 -0700
                Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-15 21:00 -0700
                Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-15 22:09 -0700
            Re: Audio Generator or Function Generator? Which to get? Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2017-03-16 10:09 +0000
            Re: Audio Generator or Function Generator? Which to get? "David Eather" <eather@tpg.com.au> - 2017-03-17 13:56 +1000
              Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-16 22:44 -0700
              Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-17 02:35 -0700
                Re: Audio Generator or Function Generator? Which to get? Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2017-03-17 11:28 +0000
                Re: Audio Generator or Function Generator? Which to get? rickman <gnuarm@gmail.com> - 2017-03-17 11:10 -0400
          Re: Audio Generator or Function Generator? Which to get? George Herold <gherold@teachspin.com> - 2017-03-15 07:13 -0700
  Re: Audio Generator or Function Generator? Which to get? Ralph Mowery <rmowery28146@earthlink.net> - 2017-03-13 10:13 -0400
  Re: Audio Generator or Function Generator? Which to get? "dcaster@krl.org" <dcaster@krl.org> - 2017-03-13 09:09 -0700
    Re: Audio Generator or Function Generator? Which to get? Jasen Betts <jasen@xnet.co.nz> - 2017-03-13 18:59 +0000
      Re: Audio Generator or Function Generator? Which to get? rickman <gnuarm@gmail.com> - 2017-03-14 19:43 -0400
        Re: Audio Generator or Function Generator? Which to get? krw@notreal.com - 2017-03-14 20:50 -0400
          Re: Audio Generator or Function Generator? Which to get? "dcaster@krl.org" <dcaster@krl.org> - 2017-03-14 18:34 -0700
            Re: Audio Generator or Function Generator? Which to get? krw@notreal.com - 2017-03-14 21:48 -0400
          Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-15 05:43 -0700
            Re: Audio Generator or Function Generator? Which to get? "dcaster@krl.org" <dcaster@krl.org> - 2017-03-15 07:30 -0700
              Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-15 11:36 -0700
            Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-15 17:46 -0700
              Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-15 19:15 -0700
                Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-15 19:26 -0700
                Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-15 19:45 -0700
                Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-15 20:15 -0700
                Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-15 21:05 -0700
                Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-15 22:24 -0700
                Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-16 10:07 -0700
                Re: Audio Generator or Function Generator? Which to get? rickman <gnuarm@gmail.com> - 2017-03-16 14:06 -0400
                Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-16 15:37 -0700
    Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-13 17:43 -0700
      Re: Audio Generator or Function Generator? Which to get? "dcaster@krl.org" <dcaster@krl.org> - 2017-03-14 06:46 -0700
        Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-14 07:01 -0700
          Re: Audio Generator or Function Generator? Which to get? "dcaster@krl.org" <dcaster@krl.org> - 2017-03-14 08:51 -0700
            Re: Audio Generator or Function Generator? Which to get? amdx <nojunk@knology.net> - 2017-03-14 11:13 -0500
            Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-14 16:20 -0700
        Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-14 17:47 -0700
  Re: Audio Generator or Function Generator? Which to get? Jeff Liebermann <jeffl@cruzio.com> - 2017-03-13 09:27 -0700
    Re: Audio Generator or Function Generator? Which to get? oldschool@tubes.com - 2017-03-13 14:23 -0500
      Re: Audio Generator or Function Generator? Which to get? Ralph Mowery <rmowery28146@earthlink.net> - 2017-03-13 16:28 -0400
      Re: Audio Generator or Function Generator? Which to get? rickman <gnuarm@gmail.com> - 2017-03-14 19:57 -0400
        Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-15 05:46 -0700
          Re: Audio Generator or Function Generator? Which to get? rickman <gnuarm@gmail.com> - 2017-03-15 12:36 -0400
            Re: Audio Generator or Function Generator? Which to get? tabbypurr@gmail.com - 2017-03-15 11:38 -0700
            Re: Audio Generator or Function Generator? Which to get? Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2017-03-16 12:52 +0000
              Re: Audio Generator or Function Generator? Which to get? rickman <gnuarm@gmail.com> - 2017-03-16 12:53 -0400
  Re: Audio Generator or Function Generator? Which to get? amdx <nojunk@knology.net> - 2017-03-13 13:43 -0500
    Re: Audio Generator or Function Generator? Which to get? amdx <nojunk@knology.net> - 2017-03-13 14:01 -0500
    Re: Audio Generator or Function Generator? Which to get? oldschool@tubes.com - 2017-03-13 14:33 -0500
      Re: Audio Generator or Function Generator? Which to get? amdx <nojunk@knology.net> - 2017-03-13 14:51 -0500
      Re: Audio Generator or Function Generator? Which to get? rickman <gnuarm@gmail.com> - 2017-03-14 20:02 -0400
  Re: Audio Generator or Function Generator? Which to get? "Benderthe.evilrobot" <Benderthe.evilrobot@virginmedia.com> - 2017-03-13 21:15 +0000
  Re: Audio Generator or Function Generator? Which to get? rickman <gnuarm@gmail.com> - 2017-03-14 14:31 -0400
    Re: Audio Generator or Function Generator? Which to get? whit3rd <whit3rd@gmail.com> - 2017-03-14 17:23 -0700
      Re: Audio Generator or Function Generator? Which to get? rickman <gnuarm@gmail.com> - 2017-03-14 20:52 -0400
        Re: Audio Generator or Function Generator? Which to get? whit3rd <whit3rd@gmail.com> - 2017-03-14 18:24 -0700
          Re: Audio Generator or Function Generator? Which to get? rickman <gnuarm@gmail.com> - 2017-03-14 23:26 -0400
            Re: Audio Generator or Function Generator? Which to get? whit3rd <whit3rd@gmail.com> - 2017-03-15 13:06 -0700
              Re: Audio Generator or Function Generator? Which to get? rickman <gnuarm@gmail.com> - 2017-03-15 16:24 -0400
        Re: Audio Generator or Function Generator? Which to get? Jasen Betts <jasen@xnet.co.nz> - 2017-03-15 02:21 +0000
          Re: Audio Generator or Function Generator? Which to get? amdx <nojunk@knology.net> - 2017-03-15 07:24 -0500
            Re: Audio Generator or Function Generator? Which to get? rickman <gnuarm@gmail.com> - 2017-03-15 12:38 -0400
    Re: Audio Generator or Function Generator? Which to get? Phil Allison <pallison49@gmail.com> - 2017-03-14 17:53 -0700
  Re: Audio Generator or Function Generator? Which to get? Bill Beaty <billb@eskimo.com> - 2017-03-16 14:04 -0700
  Re: Audio Generator or Function Generator? Which to get? DemonicTubes <tlackie@gmail.com> - 2017-03-17 08:55 -0700
    Re: Audio Generator or Function Generator? Which to get? Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2017-03-17 16:10 +0000

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