[sdiy] IN your mind, what is ....

[jhaible]

> Hah... if Bob Pease were dead... he'd be spinning
> in his grave  (just got an e-mail reply from him
> regarding if Serge contributed apps to AN-72)
> Mr. Pease says he doubts that Serge was a
> contributor...

Thanks for the info, Harry.


> Also "LM3900 is NOT an opamp" and "has no precision"

Quoting the LM3900 designer once more:
"Because application design approaches are very different
from those used with standard opamps, the LM3900 is usually
not called an opamp to avoid confusion with standard
opamps."

> and "has no precision"

Indeed - it has only 3V/mV (70dB) of open loop gain.

IMO the only thing that makes this chip somewhat attractive
even today is the fact that it has the current mirrors that
complete a pnp pair to form a discrete OTA already built in,
four-fold, in addition to the quad amplifier function.
The classic ARP 4pole filter gets my vote for the all-time
best LM3900 application.

JH.