Method and apparatus for adjusting the threshold for determining

Details Method and apparatus for adjusting the threshold for determining Method and apparatus for adjusting the threshold for determining

1990-10-15

1992-12-01

Harvey, Jack B.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324606, 324684, G01R 2726

Patent

active

051682397

ABSTRACT:
Two capacitive sensors are positioned on opposite sides of the sheet material, having their outputs connected additively. The output of the capacitive sensors is then supplied to a comparator to which a known reference voltage is also supplied. An adaptive circuit adaptively changes the reference voltage.

REFERENCES:
patent: 3523246 (1970-08-01), Hall et al.
patent: 3990005 (1976-11-01), Abbe et al.
patent: 4086528 (1978-04-01), Walton
patent: 4910453 (1990-03-01), Abbe et al.
patent: 4935700 (1990-06-01), Garbini et al.

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