On Wed, Oct 22, 1997 at 12:00:22AM +0100, Mattias Engstrvm wrote: > We need to implement some white noise using preferrably analog > circuitry. Is this easily achieved? The usual technique is to reverse bias a Zener diode, and amplify the breakdown noise. Unless you use a special noise diode, the noise spectrum will not be perfect, but that's probably not an issue for your purpose. You'll need to experiment with how much amplification is required - quite likely you can get away with one op-amp stage. -- Clyde Smith-Stubbs | HI-TECH Software Email: clyde@htsoft.com | Phone Fax WWW: http://www.htsoft.com/ | USA: (408) 490 2885 (408) 490 2885 PGP: finger clyde@htsoft.com | AUS: +61 7 3354 2411 +61 7 3354 2422 --------------------------------------------------------------------------- ANSI C for the PIC! Now shipping! See www.htsoft.com for more info.