We're talking individual atomic sized defects, typically on the surface (which is why buried structures are used for low-noise devices). Individual charges can get stuck on these defects, then get knocked out again, then get stuck again - leading to discrete changes in the local electric field - popcorn noise and flicker noise are mainly due to this sort of thing.
The kind of bad transistor you describe has actually deteriorated somehow.
The kind of bad transistor you describe has actually deteriorated somehow.
A
I think all semiconductors more or less suffer from this problem.
In a particular application, I needed to replace about 10% of the AD797 because of popcorn noise taking the device (measuring instrument) in which it was used out of spec.
I think I have a similar problem with my amp right now, the right channel suffers from some very light crackling noise.
Does that explain the reported popcorn noise for the lm4562 opamp? Does Doug Self ever mention this in any of his writings?
I think all semiconductors more or less suffer from this problem.
In a particular application, I needed to replace about 10% of the AD797 because of popcorn noise taking the device (measuring instrument) in which it was used out of spec.
I think I have a similar problem with my amp right now, the right channel suffers from some very light crackling noise.