[time-nuts] our favorite topics

KA2WEU at aol.com KA2WEU at aol.com
Sun Oct 30 06:22:59 EDT 2016


Good Morning 
 
The oscillator market is extremely completive and a few dB can easily make  
a buy or not decission.It is not the non liner spice type analysis but the  
non-linear noise analysis that makes the difference. I agree SPICE was 
never  meant for non linear noise.
 
There is a difference if you "just build" on oscillator or want to know  
where the limits of physics are . Rhea made the circuits more transparent  but 
I find
 
 Everard's  "Fundamentals of RF Circuit Design: with Low Noise  
Oscillators".
 
infinitely better. These are personal opinions , not gospel . 
 
At the end of the day the winner is the one with the best understanding and 
 the best products, no doubt about it .
 
73 de Ulrich N1UL 




In a message dated 10/30/2016 12:29:37 A.M. Eastern Daylight Time,  
dk4xp at arcor.de writes:

Am  30.10.2016 um 01:56 schrieb KA2WEU--- via time-nuts:
> The Parzen book  was on my list (Amazon ), I find these books,  including
> Rhea's  book practically useless as they do not provide the necessary   
non
> -linear noise analysis, and do not have real live examples with  test 
data.
> Cerda's "Understanding Quartz Crystals and Oscillators book  I have not  
seen.
>   
> 73 de Ulrich
I really  do not like to see Rhea dissed this way. Yes, nonlinear sim may 
buy  another dB or two,
but in the end one has to stay at least somewhat linear,  lest one builds 
an 1/f upconverter.
(and Harbec does  nonlinear.)

Others don't even have their linear basics complete;  everybody talks 
loop gain but
nobody shows how you get from your  network analyzer to the correct 
answer of a
circuit whose output is  terminated with its own input and whose input is 
terminated
with its  own output. It took Rhea to present that on page 3 or so.

And I see a  lot of examples compared to actual measurements, and the
Genesys design  kits simply work. In fact, Rhea's Genesys is the one 
simulator  that
saved me most of the time, and that includes LTspice, which says a  lot.

He more or less forced Agilent to buy a competitor from the  market, while
they had their own ADS. (which tries to be everybody's  darling, nothing it
can't do, but it is too complicated if you do not use  it every day.)
>
>> I found Frerking's "Crystal Oscillator  Design and  Temperature
> Compensation"
>> to be a  fruitful read. It's free on the  archive,
>>    
>  
https://archive.org/details/CrystalOscillatorDesignTemperatureCompensation   .

Silly me, I've bought it. But his book on digital radio is much  better.


vy 73 de Gerhard,  DK4XP
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