Excellent...thank you - jneutron - Propeller Head Plaza

Excellent...thank you

Posted by jneutron (A) on August 24, 2005 at 07:41:01

In Reply to: Re: please stop diverting, John posted by john curl on August 24, 2005 at 07:18:37:

Hi John.

JC: ""Perhaps I should have stated that the nanoresistors are free of Johnson noise. At least this is what I have been told. I suspect that the noise spectra essentially falls outside the audio range. What do you think? I haven't measured one, but I suspect that its noise would be very low compared to its effective resistance. Why don't you ask your associates? Someone must know something more specific about this. ""

Within the next few years, we'll have an up and running Center for Functional Nanomaterials, they are pouring the foundation this month. Then, there will be a real place to go to ask those exact questions. For now, the personnell who will populate the CFN are dispersed among the various departments...material science, NSLS, physics, chemistry, biology (they have a STEM microscope there), and the collider group.

The resistor itself is certainly without noise of any kind, as the electrons are moving ballistically, without any collision (or interaction if not comfortable with the billiard ball model)..the problem arises when the electrons hit the electrode at the end.

The difference from real resistors would stem from the spectra difference associated with the energy lost in the collision..if for example, you have a nano resistor that is 1 mm long withh 10 volts across it, you'd expect the collisions at the end of the tube to be with electrons that have 10 electron volts of energy. If you consider a normal resistor, a single electron would have say, a million collisions, each collision having 10 millionth's of an electron volt of energy..

So, the spectra would be different, and it would be interesting to know if the nanotube one provides some advantage over the normal one, given that it has a million times less collisions, but each one has a million times more energy..

This conversation is a pleasure John...thank you.

Cheers

John

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Follow Ups Full Thread

Topic - Prospects for carbon fiber tecnology in electronics (audio)? - free.ranger 15:26:10 08/21/05 (20)

Re: Prospects for carbon fiber tecnology in electronics (audio)? - Jim Willis 14:59:03 08/23/05 (1)

Thanks Jim. nt - free.ranger 10:20:29 08/24/05 (0)

Nono caps should be on the way. - jensw 00:06:37 08/23/05 (13)

Re: Nono caps should be on the way. - john curl 10:22:29 08/23/05 (12)

noiseless resistors?...do you have a link to that?..nt - jneutron 11:06:40 08/23/05 (11)

Re: noiseless resistors?...do you have a link to that?..nt - john curl 12:16:10 08/23/05 (10)

Ah, that is what I thought. - jneutron 12:51:21 08/23/05 (9)

Re: Ah, that is what I thought. - john curl 13:12:32 08/23/05 (8)

Re: Ah, that is what I thought. - john curl 14:56:57 08/23/05 (6)

please stop diverting, John - jneutron 05:55:08 08/24/05 (5)

You're being silly - Mahatma Kane Jeeves 17:58:22 08/25/05 (2)

Re: You're being silly - Jacques 06:37:24 09/15/05 (0)

holy crap...that was good..:-) - jneutron 07:11:09 08/26/05 (0)

Re: please stop diverting, John - john curl 07:18:37 08/24/05 (1)

Excellent...thank you - jneutron 07:41:01 08/24/05 (0)

hey there John.. - jneutron 13:42:49 08/23/05 (0)

Re: Prospects for carbon fiber tecnology in electronics (audio)? - Steve Eddy 17:47:32 08/22/05 (2)

Re: Prospects for carbon fiber tecnology in electronics (audio)? - Mahatma Kane Jeeves 20:20:19 08/22/05 (0)

Re: - free.ranger 19:15:59 08/22/05 (0)

If it sounds exotic and costs a lot it'll be in an audio product soon -nt- - jbmcb 07:46:05 08/22/05 (0)

Follow Ups

Excellent...thank you - jneutron 07:41:01 08/24/05 (0)

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