Ban wrote in message
...
John Jardine wrote:
Diego Stutzer wrote in message
m...
Hi,
-clip-

___
o-|___|--+--------+--------+---o
10k | | |
| | |
--- --- ---
--- --- ---
|100n |10n | 3n3
.-. .-. |
| | | | |
| |15k | |10k |
'-' '-' |
| | |
o--------+--------+--------+---o
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de
use fixed font to view

This does exactly what you want, in the beginning the slope is less than
3dB/oct. and at 10kHz it goes to 6dB/oct.
This is how to produce a pink noise that rolls off faster at the end of
range, or to make some weighted filters (dBA) etc.

ciao Ban


[Slightly OT].These 'spread CR' things are *weird*. How else can 1Hz to 1MHz
be set with just one pot!.

,-------------------+--------------.
| | |
.-. .-. |
2k7| | | | |
| | | | |
'-' '-'220 |
| | |
| ¦ V+ |
| | |\| |
,---+---+--++---+---+--------- | ------|-\ |
| | | | | | Min.-. | ---'-o
.-. .-. .-. .-. .-. .-. | |-----|+/ Square wave out
| | | | | | | | | | | | | | |/|
| | | | | | | | | | | | Max'-'Pot V-
'-' '-' '-' '-' '-' '-' | 10k
| | | | | | |
--- --- --- --- --- --- Comparitor
--- --- --- --- --- --- |
A| B| C| D| E| F| .-.
'---+---+---+---+---' | |680
| | |
0V '-'
A=10K:10u |
B=4k7:1u 0V
C=2k2:100n
D=1k2:100n
E=680:1n
F=330:100p

created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de

regards
john