OTAs and Harry's flame bait BDDs

[Scott Gravenhorst]

I have it!

At http://members.xoom.com/_XMCM/chordman/index.html

The link is up top.  This is quite good.

Harry Bissell <harrybissell at prodigy.net> wrote:
>Yo Larry (et al)
>
>The OTA is lots of fun to play with. I'm sorry I didn't start playing with
>them
>years ago.  watch out for the Gm bias pin though... its a current input and
>applying a voltage to it (with no current limit) will kill it.
>
>Who has Gene Zumchak's OTA primer on their site... OK fess up... maybe
>Rene?  I forget... but read that. If you don't get it, ask some questions on
>or off
>list....
>
>H^)  harry
>
>"J. Larry Hendry" wrote:
>
>> ----- Original Message -----
>> From: Harry Bissell <harrybissell at prodigy.net>
>> BTW I consider the BBD a digital delay, albeit
>> a Sh!tty one. The fact that it has an analog range
>> of oh... a couple volts in the Y axis does not cover
>> up the sampled data nature of the X axis....
>> so just saying analog does not mean good !
>>
>> (if this don't draw some flames then the list is dead....;^)
>> H^) harry
>> ----
>> ZZZZzzzzz.........
>> You are witnessing the lingering effects of turkey induced tranquility.
>> Larry H
>>
>> ----- Original Message -----
>> From: Scott Gravenhorst <music.maker at gte.net>
>> An OTA (operational transconductance amplifier) is an
>> extension of an opamp in that the multiplier is controllable
>> by a voltage.  Even more fun things can be done with an
>> OTA,  including voltage controlled oscillators, filters and
>> amplifiers (plus more).
>> ----
>> Forgive my ignorance as I am still a newbie to these synth circuits.  I
>> am learning and am just getting a fairly decent handle on these
>> op-amps.  My first real project was to use some 1013 op-amps
>> to add octave and interval switches for any 1-volt-oct VCOs since
>> the MOTM-300a that I use have only continuous tuning.
>>
>> The prototypes can be seen at:
>> http://www.modglin.com/larry
>>
>> I found Scott's etire post to be quite interesting.  But, his description
>> of OTA's is what has me most interested.  Seems like this might be a
>> nice "next step" for me to build something.  I plan to do some
>> reading in some of the recent texts I have acquired.  But, I consider
>> this list a better resource than anything, so I will ask a basic question.
>> Are OTAs really good choices for voltage controlled amplifiers for use
>> in things like VC panners, VCAs amd VC mixers?  Or is purseing that
>> course of action mostly an excercise in education?
>>
>> Is 3080 I see mentioned a lot a good choice for VCA applications?
>>
>> As always, thanks for the expertise, humor, and tolerance of newbies on
>> this great list.
>>
>> Larry Hendry
>

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