[sdiy] OTA report

[James Patchell]

The Old Crow is not the one selling the CA3280's....that is me...and by the 
way, I still have plenty of them.

At 11:31 AM 3/31/2005 -0800, Tim Parkhurst wrote:
>Hi All,
>
>Just wanted to report what I found from a recent Google search on OTAs
>
>Two interesting papers on theory and applications, both by
>Dr. William R. Grise
>
>Application of the Operational Transconductance Amplifier (OTA) to
>Voltage-controlled Amplifiers and Active Filters
>http://et.nmsu.edu/~etti/winter98/electronics/grise/wrg.html
>
>Operational Transconductance Amplifiers (OTA) for synthesis of
>voltage-controlled active-filter tuned oscillators
>http://et.nmsu.edu/~etti/fall98/electronics/grise/griseota.html
>
>*****************
>Mouser has the following:
>13600 (NJR brand)  16 DIP  .42 ea
>13600 (NJR brand)  16 DMP (surface mount) .53ea
>
>13700 (NJR brand)  16 DIP  .72 ea
>13700 (NJR brand)  16 DMP  .41 ea
>
>Digi-Key has:
>13700N  16 DIP  $1.43 ea
>13700D (NJR brand)  16 DIP  .99ea
>13700M (NJR brand)  16 DMP  .81 ea
>
>*****************
>The CA3280E is shown as ACTIVE at Intersil.com. Price is $3.03ea for
>quantities of 100 to 1000 (do I smell a group buy coming on?) Our own Old
>Crow has them listed for sale at $4.00 ea,
>http://www.oldcrows.net/~patchell/parts/parts.html
>
>and Mouser has them at $5.23 ea (ouch).
>
>Search for 5517 at Mouser and Digi-Key turned up nothing. A Google search
>was equally fruitless. Maybe I'm missing something basic here. Is this OTA
>still available? Is it the same as the 13700 (just a different munfacturer's
>number)? Anyway, I just wanted to share my findings with the group as to the
>availability and health of the OTA. As you were.
>
>
>Tim (you can't spell tomato without ota...sort of) Servo
>
>"Imagination is more important than knowledge." - Albert Einstein
>
>
>--
>No virus found in this outgoing message.
>Checked by AVG Anti-Virus.
>Version: 7.0.308 / Virus Database: 266.9.0 - Release Date: 3/31/2005
>
>
>
>
>***************************************************************************
>This message is confidential.  The information contained in
>this e-mail message is intended only for confidential use of the
>recipient(s) named above. If the reader of this message is not the intended
>recipient or an agent responsible for delivering it to the intended
>recipient, you are hereby notified that you have received this document in
>error and that any review, dissemination, distribution, or copying of this
>message is strictly prohibited.  If you have received this communication in
>error, please notify us immediately by e-mail, and delete the original
>message.
>***************************************************************************

         -Jim
***************************************************************
http://www.oldcrows.net/~patchell

***************************************************************