[hpsdr] Odyssey Siren Design

[Ahti Aintila]

Steve,

Now that you found the SN74LVC2G53 for me, I'm going to change over to
that device. You just go ahead with this concept. It looks to me a
very good compromise regarding the low power requirements.

By the way, you may consider using Vcom reference voltage from the
AK5394A for biasing the switch and the opamp.

73, Ahti OH2RZ


On 28/09/06, Steven Bible <n7hpr at tapr.org> wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hello Ahti,
>
> Thank you very much.  You've given me more to think about.
>
> 1. In some more research today, I think the only other fully differential
> opamp that comes close to the noise figure of the OPA1632 is the THS413x.
> However, it costs almost $2.00 more than the OPA1632.  The OPA1632 can go
> lower in supply voltage (+/-2.5V) whereas the THS413x is 5V (advantage
> OPA1632).
>
> 2. and 3. Now I get it.  To get the sampling pulses you need, there is no
> other part.  Not even a combined part.  All the combined swithes that I
> found the clocking is common to all the switches, and that won't work for
> your circuit.
>
> Finally, I'll try to use the SN74LVC2G53.  But I could also simply run the
> SN74AUC2G53 at 2.7V.  It is only another regulator.  Your thoughts?
>
> I think I have enough information now, I'll continue drawing the schematic
> and post it to the list soon.
>
> 73,
>
> - Steve, N7HPR
>  (n7hpr at tapr.org)
>
>
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