[hpsdr] JANUS: Update on Alpha

[Ahti Aintila]

Lyle,

Naturally we should use balanced buffers as suggested in the data
sheet(2005/05) Figure10. page 20. My selection for the buffer is
OPA4227 that is unity gain stable and has noise density 3 nV/sqrtHz.

I have been planning to rip off INA163 from the TRX board  and use
OPA4227 instead with low gain. We have to remember that QSD can handle
maximum 4 Vpp and AK5394A can stand 2.44 Vpp.

The local Asahi Kasai dealer in Finland can deliver samples, so I
assume that samples are available in the USA, too.

Good luck for the experiments,
Ahti OH2RZ


On 08/05/06, Lyle Johnson <kk7p at wavecable.com> wrote:
> Hello Ahti!
>
> > I am very excited in hearing the news and testing results. AK5394A is
> > my favorite choice.
>
> Any tips on how to best apply it, input amplifiers, etc?  Currently
> adapting the datasheet design...
>
> Lyle KK7P
>
>

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