[hpsdr] More info on CMX994...

[n3evl]

I spoke with Daoud Serang (DSerang at cmlmicro.com) at CMLMicro with regard 
to the CMX994 device I mentioned a few days ago.  If anyone is 
interested in finding out more about this or other chips in the family, 
he'd be happy to discuss.

I pointed him at the openHPSDR web site so he has an idea of the kind of 
projects involved to date and the level of complexity (and 
sophistication of  course!). 

I'm presently looking at the details of the 994 device with a view to 
maybe getting hold of a development board at some time for my own 
education/experimentation.

I've no affiliation of any kind with this company - just thought the 
chips looked interesting with possible potential for future HPSDR use.

Daoud's comments discussing the chip family are summarized below.

Pete, N3EVL

> As discussed RF designers involved in the openHPSDR project are welcome to 
> also contact us for info on the CMX994 and some of our other 100MHz-1GHz RF 
> devices because I expect they'll find they are a very good fit
> e.g. for interfacing with the Janus board, as you mentioned. For
> example our CMX993 direct conversion modulator, which integrates more
> glue circuits than typical I/Q modulators, would directly complement
> the CMX994 direct conversion receiver. In addition our CMX998 direct
> conversion modulator includes a special feedback circuit to linearize
> an external RF PA via the Cartesian Feedback Loop technique, which is
> very useful in linear modulations systems that otherwise must use
> power-hungry (big, hot and
> expensive) Class A RF PAs.
> 
> Our CMX991 I/Q RF transceiver device (and also the receiver only
> CMX992) would also be a good fit for openHPSDR designs.
> 
> The performance delivered by CML's RF devices is high, they all cover
> at least a 100MHz to 1GHz RF carrier operating range, and their level
> of integration and 3.3V supply make them attractive to many RF
> designers. Our receiver devices support excellent interference
> immunity, unlike 'really good garage door opener' RF chips that are
> hyped as 'high performance'.
> 
> Let me know if I can be of more assistance and, again, please feel

free to connect openHPSDR  RF designers with me and we'll do our best to
> assist them.
>