Re: [time-nuts] Random Walk Noise experiment

2011-02-13 Thread Bruce Griffiths
ehydra wrote: I think the confusion is now perfect: http://www.mikrocontroller.net/topic/207061#2059725 Let Google translate it from german to your language. Does the difference come from voltage vs. power spectrum? Yes, integrating the power spectrum of white noise produces flicker noise

Re: [time-nuts] Random Walk Noise experiment

2011-02-13 Thread Magnus Danielson
On 13/02/11 07:11, ehydra wrote: I think the confusion is now perfect: http://www.mikrocontroller.net/topic/207061#2059725 Let Google translate it from german to your language. Does the difference come from voltage vs. power spectrum? Yes. When you integrate you get a f^-1 slope in voltage

[time-nuts] Random Walk Noise experiment

2011-02-12 Thread ehydra
Hi all! I friend of mine wants to construct an experiment for students for studying random walk noise. What is the best good available transistor or other parts? All parts he tested where just to good. Thank you! - Henry -- ehydra.dyndns.info

Re: [time-nuts] Random Walk Noise experiment

2011-02-12 Thread Magnus Danielson
On 12/02/11 14:16, ehydra wrote: Hi all! I friend of mine wants to construct an experiment for students for studying random walk noise. What is the best good available transistor or other parts? All parts he tested where just to good. Thank you! Use a standard transistor or diode. Run a

Re: [time-nuts] Random Walk Noise experiment

2011-02-12 Thread lists
To: time-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Random Walk Noise experiment On 12/02/11 14:16, ehydra wrote: Hi all! I friend of mine wants to construct an experiment for students for studying random walk

Re: [time-nuts] Random Walk Noise experiment

2011-02-12 Thread Chris Albertson
What is the best good available transistor or other parts? All parts he tested where just to good. A conducting zenier diode across the input of an amplifier. -- = Chris Albertson Redondo Beach, California ___ time-nuts mailing list --

Re: [time-nuts] Random Walk Noise experiment

2011-02-12 Thread Don Latham
in software: http://socrates.berkeley.edu/~phylabs/bsc/Supplementary/NoiseGenerator.html Chris Albertson What is the best good available transistor or other parts? All parts he tested where just to good. A conducting zenier diode across the input of an amplifier. -- = Chris Albertson

Re: [time-nuts] Random Walk Noise experiment

2011-02-12 Thread Don Latham
also see: http://ipnpr.jpl.nasa.gov/progress_report/42-77/77M.PDF remarkable what a little googling will turn up... Chris Albertson What is the best good available transistor or other parts? All parts he tested where just to good. A conducting zenier diode across the input of an amplifier.

Re: [time-nuts] Random Walk Noise experiment

2011-02-12 Thread Bruce Griffiths
Flicker noise is not the same as random walk noise, the spectra differ. Using an AC coupled generator (eg a sound card) filters out the low frequency content. Zeners and transistors (biased at low current) can be used to generate flicker noise directly at least for low frequencies where it

Re: [time-nuts] Random Walk Noise experiment

2011-02-12 Thread Magnus Danielson
On 12/02/11 21:02, Bruce Griffiths wrote: Flicker noise is not the same as random walk noise, the spectra differ. Using an AC coupled generator (eg a sound card) filters out the low frequency content. Zeners and transistors (biased at low current) can be used to generate flicker noise directly

Re: [time-nuts] Random Walk Noise experiment

2011-02-12 Thread ehydra
I think the confusion is now perfect: http://www.mikrocontroller.net/topic/207061#2059725 Let Google translate it from german to your language. Does the difference come from voltage vs. power spectrum? Magnus Danielson schrieb: On 12/02/11 21:02, Bruce Griffiths wrote: Flicker noise is not