[hpsdr] Odyssey Active QSD Rev. A Schematic

[Ahti Aintila]

On 29/09/06, Alberto I2PHD <i2phd at weaksignals.com> wrote:
> ***** High Performance Software Defined Radio Discussion List *****
, but the two opamps have their inputs biased at 2.5V and the supply
voltage is 5V,
> single-rail. Given that good sound cards can happily accepts up to 4V and more of signal, isn't a design that limits its
> output to 2.5Vp incapable of fully exploiting the dynamic offered by the sound card itself ?
> Wouldn't a ±15V as supply voltage be more adequate for an uncompromised design ?
>
> 73  Alberto  I2PHD

Alberto,

You are absolutely right, but in this case the circuit is designed for
a low power application using a bare CODEC circuit instead of the
sound card.

In other applications I really would use ±5 V or higher supply,
preferably ±15 V.

73, Ahti OH2RZ

>
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at hpsdr.org
> Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> HPSDR web page: http://hpsdr.org
> Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
>

 1159536683.0