Yahoo Groups archive

MOTM

Index last updated: 2026-04-14 00:02 UTC

Message

Re: Possible strange question about SMT

2005-08-18 by Mike Marsh

Oops, I replied to this in almost exactly the same way.  Except that
Larry says it better...

--- In motm@yahoogroups.com, Larry David <ldavid777@s...> wrote:
> 
> On Aug 18, 2005, at 11:52 AM, paulhaneberg wrote:
> 
> > I have to admit I'm somewhat bewildered by this discussion.
> > Most resistors in MOTM modules have a tolerance of 5%.  For
> > capacitors, the tolerance is 10% or higher.  The effect of
> > inductance and capacitance generated by the lead wires inside IC
> > chips is infinitesimal in comparison to the variations due to
> > tolerance.
> 
> I was asking more about the physics of the silicon junctions - pn and  
> np and all that - if they are physically smaller on SMT chips than on  
> older through-hole ICs or DIPs or whatever they are called.  And if  
> they are smaller - or different in some other way - whether that would  
> affect how they sound in EM ckts.  Whether this would cause better  
> tolerances and thus less variation, for example.  As I think I said in  
> another post, these effects, if they exist at all, would probably be  
> more noticeable in custom synth-on-a-chip ICs  like on the Andromeda -  
> and not in an MOTM module that has some SMT ICs on a board full of  
> discrete Rs and Cs.
> 
> > If you make a sound with two VCOs they will both have slightly
> > different characteristics.  This is part of what makes them sound
> > analog.  If they sounded the same you would say it sounded Digital.
> 
> Exactly.  My question was about whether SMT IC components would sound  
> more "digital" in this sense than discrete components.  Intuitively it  
> seems so, but I was asking the real engineers for the lowdown.
> 
> >
> > My 2 cents.
> >
> > Paul Haneberg
> >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.