[sdiy] Noise as one unsteady tone!

[karl dalen]

Tip!

Some time ago i was looking for a low voltage noise source,
and by coincidence i have found one. As we know its difficult
to do a analog withe noise generator at low voltages by using 
the typical PN junction, zener or diode couppled.

But i came by the korg Poly 800 and it uses a simple 
NPN, open collector, emitter to +V, base negative biased
to -5V, AC coupled to a simple inverter stage. It works verry
well even at supply volatges of  +/-3,5. I use it with +/-5 volt
and a non selected BC547 and a 2,2M ohm gain stage wich 
gives several volts of uniform with noise.

Splendid!

Speaking of noise, theory says that white gaussian
noise contains all frequencies but are theese steady
tones or are they random in frequency?
Or is it "one" wave with its frequency randomly?

KD