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 and integer chips with a noise floor of -172 dBc/Hz up to 22 GHz and many MHz off and these require careful planing and are needed for high end test equipments. But maybe my application is too special . For me Hittite takes too much power and all these companies make nice parts nut not really leading edge parts. Keysight could not build many "boxes" without their own designs, architecture and hardware like oscillators Thanks, Ulrich . In a message dated 3/7/2016 10:33:29 P.M. Eastern Standard Time, rich...@karlquist.com writes:
I know for me, I mainly use the "synthesizer on a chip" IC's from Analog Devices/Hittite and National. Their data sheets and ap notes serve as the "textbook". I'm not sure there will be much call going forward for a book on fundamentals that explains how to design synthesizers from first principles using basic building blocks. Having designed PLL's for over 40 years, I know all about how to do this, yet is now a nearly useless skill with the IC's now available. Only the IC designers themselves need these skills. Occasionally I find myself mentoring these guys in the hope of getting better chips to buy :-) (I have a patent on a phase detector design that was made into a chip, but the chip is built by Keysight's captive foundry which doesn't sell much to the merchant market.) No criticism of the book; it's just a market issue. Rick N6RK On 3/7/2016 4:52 PM, KA2WEU--- via time-nuts wrote: > To all : > > I have published the following book > > " Microwave and Wireless Synthesizers: Theory and Design, Ulrich L. Rohde, > John Wiley & Sons, August 1997, ISBN 0-471-52019-5." > > and have since kind of drifted into the VCO und high stability > oscillators. > The first edition > > "Digital PLL Frequency Synthesizers - Theory and Design, Ulrich L. Rohde, > Prentice-Hall, Inc., Englewood Cliffs, NJ, January 1983 " > > has sold more then 10 000 copies. Is there any of you out there who would > like to take over a needed update and take over the resulting revenues and > unfortunately also the work and glory and who feels qualified to so ? > > As I am more or less now in microwave technology and less in PLL IC's, I > hate to see this standard textbook disappear.... Who can help or want to > take over? > > Ulrich > > > > > > > In a message dated 3/2/2016 12:04:00 P.M. Eastern Standard Time, > time-nuts@febo.com writes: > > > > > In a message dated 2/16/2016 9:03:59 A.M. Eastern Standard Time, > time-nuts@febo.com writes:. > > http://www.synergymwave.com/articles/2016/calculation-of-fm-and-am.pdf > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.