[sdiy] Forget the OTA, find me a CDTA!

[cheater00 .]

Hey guys,
just stumbled upon this little novelty item. Apparently the
not-available-anymore OTA has been obsoleted by the not-available-yet
CDTA:

http://en.wikipedia.org/wiki/Current_differencing_transconductance_amplifier

http://www.edn.com/design/analog/4405810/The-Current-Differencing-Transconductance-Amplifier--CDTA-

It seems like it's making a case for itself, so who knows.. it might
find use in future applications and start mass production.

In other news, I've come across this simple-looking voltage-to-current
converter based off two op-amps:
http://en.wikipedia.org/wiki/Fontana_bridge
it's supposed to be a new development.

That's it for this episode of the Jetsons!

Cheers,
D.