Re: Groundplane in poweramplifier PCB design


"Wiebe Cazemier" <halfgaar@xxxxxxx> wrote in message
news:e1rcmb$2o3$1@xxxxxxxxxxxxxxxxxxxxxxxxxx
Hi,

I've just about finished designing a PCB for a HiFi power amplifier, and
now
I'm wondering something. Is it a good idea to fill up the unused space on
the
board with ground copper (without orphans of course)? Or, is it best to
keep
the ground clear of as much parts as possible, as you do with the supply
lines?

The speaker returns go directly to the main power supply BTW, so the
groundplane is not necessary for that.

Thanks in advance,

Wiebe Cazemier

No!... No ground planes. In audio circuitry you have to be very carful where
current flows to avoid ground loops and current induced feed back from
unsuspecting points. A ground plane complicates everything and you can't
define where currents flow, where troublsome microvolt drops occur or where
leakage flux induces hum. Use a star ground as others have mentioned. It's
ok to use a ground plane as a shield connected only at ONE place to the star
but be sure there are no other connections to it and no current flows in it.
Bob


.

Relevant Pages

  • Re: Groundplane in poweramplifier PCB design
    ... A ground plane complicates everything and you can't ... Use a star ground as others have mentioned. ... but be sure there are no other connections to it and no current flows in it. ... grain to add all these long thin parallel tracks. ...
    (sci.electronics.design)
  • Re: Groundplane in poweramplifier PCB design
    ... On Sunday 16 April 2006 04:56, Bob Eld wrote: ... A ground plane complicates everything and you can't ... but be sure there are no other connections to it and no current flows in it. ...
    (sci.electronics.design)
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