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From: JM <sunaecoNoSpam@gmail.com>
Newsgroups: sci.electronics.design
Subject: Re: A collection of monographs on high accuracy electronics
Date: Mon, 10 Jun 2024 01:55:51 +0100
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On Mon, 10 Jun 2024 00:29:17 -0000 (UTC), Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

>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 

Sure, which is what he states.  By mentioning a hot and cold resistor he makes it clear that net energy flow is from hot to cold, and that the T refers to the hot source.