Quote:
Originally Posted by Morgan
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Hi,
I saw there's a 2N3819 there... very hi input impedance at gate...
I saw that stuff in some old e.g. power lines detectors: the hi impedance of fet make it easy getting signals from e.g. static charges (even if no current or really small flows in the wires or other conductors... and not only),
Now the problem is, how this kind of front-end couldn't be saturated by static charges all around... ?
I mean, also the user must e.g. walk... move... and electrostatic charging could appear due to clotes that move too over the skin etc
Doesn't it give a lot of false signals ?
Kind regards,
Max