[Arm-netbook] headphone / mic

[Baybal Ni]

Is it possible just to use digital mic?


On 19 November 2012 01:32, jm <joem at martindale-electric.co.uk> wrote:

> On Sat, 2012-11-10 at 13:04 +0000, luke.leighton wrote:
> > http://rhombus-tech.net/community_ideas/kde_tablet/news/
> >
> > hi joe, ok does this look any good?  i re-did the LM17000, and laid
> > things out a bit more obviously (i hope!) how would i connect the mic
> > up - is MICM going to need capacitors/resistors?  and what about the
> > headphones?
> >
> > i vaguely know what to do i.e. it will make sense when i see it :)
> >
> > l.
>
> Luke,
>
> I am looking at
> http://hands.com/~lkcl/eoma/kde_tablet/TABLET162_20121110.pdf
>
> C184 has size 0603 and a dubious value of 1uF which is stretching
> what is possible - probably an error.
>
> C135 can go, R169 is 100K, R42 can go,  C184 can go, R168 is 100k, q14
> is 2N7002
>
> C186 can go, R99 is 100k, R104 can go
>
> R23 looks dubious. It may need to go and the xtal chosen so as not
> to require R23 to be present.
>
> For the LM3700, you will need to do a separate equivalent circuit
> diagram with all the opamps and passive components in play shown.
> That is for communication purposes - its hard to analyze what is what
> when all the components are distributed.
>
> The H-bridge area also needs a separate equivalent circuit
> showing the mosfets and related components in play so that it can
> be more readily analyzed. Search google images for typical h-bridge
> diagrams and make it look reasonably like a standard h-bridge
> configuration.
>
> The other substitutions for transistors with 2N7002 FET seem all fine.
>
>
>
>
>
>
>
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