yes, but the underlying math and system architecture will/would be exciting. Thanks, for the comments, Ulrich In a message dated 3/8/2016 11:29:25 A.M. Eastern Standard Time, [email protected] writes:
On 3/8/2016 3:18 AM, [email protected] wrote: > Good Morning, > technically you are correct, most buy what they find and live with a > compromise. But companies like mine, R&S, test equipment , need superior > performance and many parts which we need, we have made by foundries. > Numerically controlled oscillators belong to this and modern IQ > modulators and arbitrary wave form generators are the norm., much better > then many analog type designs. Most chips on the market are > compromises for power consumption and phase noise. We now have fraction I worked for HP/Agilent for 35 years, retiring 2 years ago just before the Keysight spinoff. Yes, they do have proprietary chips made by internal and external foundries (for example my phase detector). Other than that one case, I was never able to get any custom chips made during my career because of the high NRE cost and the need to have either very high volume, or an extreme value proposition to cover NRE. There was a small group of designers who designed a handful of fractional-N chips. The rest of us were merely users of them. Newer designs have tended towards COTS frac-N chips. Similarly, there was a small department of designers of NCO's, AWG's, etc (I was in the same lab with these guys), and the rest of the engineers were merely users of these IC's. So in terms of the book market, it would be limited to a small fraction of the engineers in test and measurement. And that small fraction probably has already gone way beyond any technology that has made it into textbooks. A lot of this really advanced work is based on trade secrets that of course will only appear in internal documents. Rick _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
