On Mon, 03 Sep 2007 10:55:30 -0700, John Larkin
wrote:
On Mon, 03 Sep 2007 08:12:34 -0700, Jim Thompson
wrote:
See attachment for a Sliding-Class-A output stage.
(from an S.E.D discussion)
...Jim Thompson
Whoa, an all-NPN opamp!
Yup. This pre-dates lateral PNP's. As I said, "as a lad of 24", i.e.
1964. But it's low distortion, high slew rate and external ability to
compensate... called a "feature" (we couldn't make MOS capacitors in
those days ;-), makes it a seller even today.
One of the first integrated opamps I ever used
(I used to make my own, with discretes, on little pcb sips, which
weren't bad) was a GE part. It too was all NPN, but used a zener level
shifter, and was about as useful as a noise generator as an opamp.
Anybody got a datasheet on that?
John
The GE part? I might. What was the part number?
...Jim Thompson
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