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From: Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Newsgroups: sci.electronics.design
Subject: Re: A collection of monographs on high accuracy electronics
Date: Mon, 10 Jun 2024 00:29:17 -0000 (UTC)
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JM <sunaecoNoSpam@gmail.com> wrote:
> On Sun, 9 Jun 2024 18:09:24 -0000 (UTC), Phil Hobbs
> <pcdhSpamMeSenseless@electrooptical.net> wrote:
> 
>> Jeroen Belleman <jeroen@nospam.please> wrote:
>>> On 6/9/24 19:02, ehsjr wrote:
>>>> On 6/7/2024 9:14 PM, JM wrote:
>>>>> A collection of monographs on high accuracy electronics written by Mr. 
>>>>> Chris Daykin, following his career predominantly in metrology.
>>>>> 
>>>>> Unfortunately Chris will be unable to complete the unfinished 
>>>>> monographs (having started end of life care) but there is plenty of 
>>>>> interest to any analogue engineer.
>>>>> 
>>>>> https://1drv.ms/b/c/1af24d72a509cd48/EZhO_rP5-glDmxtc4ZHycvYBhrsqmyC5tuZjt2NFFsS0gQ?e=Wq2Yj0
>>>> 
>>>> 
>>>> Thanks!
>>>> Ed
>>> 
>>> I have an issue with his definition of resistor noise power
>>> as the product of open-circuit noise voltage and short-circuit
>>> current. That makes no sense.
>>> 
>>> There's more than that, probably, but that just jumped out at
>>> me.
>>> 
>>> Jeroen Belleman
>>> 
>> 
>> It’s four times too high, for a start.  
>> 
>> Cheers 
>> 
>> Phil Hobbs 
> 
> "It is shown elsewhere [1] that the noise power is four times the heat
> energy which would flow down the conductors 
> from a warm source resistor to a matching cold resistor."
> 

Which, if true, would solve all our energy problems, except that
thermodynamic systems would all be unstable. 

The thermal noise power produced by a resistor into a matched load is kT
per hertz. 

Cheers 

Phil Hobbs 

-- 
Dr Philip C D Hobbs  Principal Consultant  ElectroOptical Innovations LLC /
Hobbs ElectroOptics  Optics, Electro-optics, Photonics, Analog Electronics