[sdiy] What makes a transistor "low noise"?

[Metrophage]

As I BEGIN to understand how transistors work, I wonder about this. I
often see op-amps labelled as being less noisy than general-purpose
types, but typically not for transistors. Still, I have heard that some
are noisier than others.

What is it about transistors which would indicate that they would or
would not distort signals somehow? How are such factors reflected in
the specs which are usually offered?

Through my time of synth reading, I feel I have a rough idea of what
makes some op-amps more or less suitable for a given application. Not
yet so with transistors though! I'd be psyched to hear some info and
opinions on this.
CJ


		
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