"ScottW" wrote in message
...
"Trevor Wilson" wrote in message
...
"Arny Krueger" wrote in message
. ..
"Trevor Wilson" wrote in message
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**Certainly. Proceed to the site you directed me to. Examine the
following brands and models:
Denon:
AVR485
AVR685
AVR1505
AVR1705
PMA700V
Lets see if you have done your homework, Trevor or if you are just
throwing the usual crap around.
Here's the box sco
Denon:
http://www.hifiengine.com/manuals.php?man=Denon
AVR685 not listed
AVR505 not listed
AVR1705 not listed
PMA700V not listed
The AVR 485 shows plenty of examples of op amps whose VCC supplies are
bypassed, but not decoupled.
**They're decoupled, you clown. The resistance of the PCB tracks and
wiring, in combination with the caps acts as a high pass filter. Get back
to me when you've studied some electronics theory. You supplied one
example where a local regulator was used (the best system, which is
usually reserved fro expensive products), whilst I showed you 25
examples. Stop arguing.
Also very many examples of op amps where VCC is
bypassed only with a small film or ceramic capacitor, and not an
electrolytic. Some examples of no proximate bypass at all.
Now I'm confused again....isn't all that power supply stuff
technically decoupling?
**Of course it is. For some reason, Arny wants to argue the point. I have no
idea why. He's wrong.
Bypassing is shunting to ground at the source...not at the
power supply.
**Bypassing is a similar term, but relates to the use of a (say) film cap
across an electro. Or, in the case of a tube amp, when the Cathode is
coupled to ground, through a resistor, which is bypassed with a capacitor.
It gets a little muddy, however.
Here's a reputable app note on high speed digital
circuits which have far greater need .....
http://hsi.web.cern.ch/HSI/s-link/de...c/decouple.pdf
**That particular cite is MUCH better than your earlier one. I concur with
the description.
**Nope. I checked. ALL use electros for decoupling. Every single one.
Some have film caps as well.
Well...I picked one op amp (BTW..I didn't see any obviously in the
audio circuits..only video)..and it was decoupled with a ceramic.
**Duh. What did you expect?
So would you mind specifying a schematic and an op-amp.
PITA to scroll back and forth between schematic and parts list.
******! Find it yourself. I just jumped through hoops for Arny. I'm not
doing it again. OK, ONCE. You get ONE example only. Here goes:
NAD 5000 CD player. Page 34.
IC109, IC110, IC111, IC112, IC113, IC114, IC117.
Happy?
Don't **** me off again. Do your own ****ing legwork. I listed a bunch of
models for you and Arny. Arny can't be bothered searching for proof and
neither, it seems, can you.
All the other models listed have similar topologies.
Trevor Wilson
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