-=> Roy J. Tellason said to All
 -=> about "BAG OF CHIPS" on 01-07-04  20:16.....

 RJT> While sorting out some "stuff" I came across this bag of chips...

 RJT> It was still stapled shut,  so it was apparently meant for something. 

Yes, I occasionally come across little packets of stuff I've
obviously set aside for some project and forgotten...

 RJT> One is a chip resembling an op amp,  but apparently preconfigured as a
 RJT> unity-gain buffer.  I found it easily enough in my databooks, though I
 RJT> don't know why you'd get these and not just use a standard op amp and
 RJT> configure it as a unity gain part.  Maybe some difference in the spec
 RJT> that's not apparent to me,  or something...    (Anybody know?)   I
 RJT> suppose I'll think of something to do with these sooner or later.

I remember them. The only reason I can think of for their
existence was that their compensation circuitrs were all
optimized for unity gain.

Compensation was a big problem and a massive compromise with the
early op-amps.

I remember the hoohah that heralded the 741, the very first
op-amp with internal compenstaion that would work right down to
unity gain!

 RJT> The other part that jumped out at me as being a little unique was a
 RJT> 565 PLL chip.  I have heard of this one before,  but have *no* idea
 RJT> what you'd do with it.  Any of you guys have any thoughts on the
 RJT> matter?

From my very battered old NS databook...

"The LM 565 and LM565C are general purpose phase locked loops
 consisting of a stable, highly linear voltage controled
 oscillator for low distortion FM demodulation, and a double
 balanced phase detector with good carrier suppression. The VCO
 frequency is set with an external resistor and capacitor, and a
 tuning range of 10:1 can be obtained with the same capacitor.

It operates from power supply range of +/-5 to +/-12v, max frequ
typically 500KHz.

I hope this helps.

From Greg Mayman, in beautiful Adelaide, South Australia
   "Queen City of The South"    34:55 S  138:36 E

... I know you're stronger than I am... But it's your turn to surrender.
___ Blue Wave/386 v2.30

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