Descret OTA was "that Japanese site"

[Rene Schmitz]

At 18:22 20.02.99 -0500, you wrote:
>
>I built an ota from that pic on that Japanese site. Works a lot like a
>3080. I'm wondering exactly how much like a 3080????
>
>We don't need no stinkin' 13600s.....:-)

>From what I know this is the gm stage of the famous SSM2044.  
The diode should be replaced by another 2N3906 connected as a diode. This
forms a current mirror, and the transistors should be matched. (A 1N4148
and a 2N3906 won't have the same Vbe.)

>I built a VCA out of it and works just like you think it would.....

Perhaps one could build this circuit with SMDs on a tiny PCB to plug them
into a 8 pin DIP to replace the CA3080 in extisting circuits.


Bye
 Rene


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