Check-actuated control mechanisms – Including means to test validity of check – By testing material composition
Patent
1991-01-08
1993-03-09
Bartuska, F. J.
Check-actuated control mechanisms
Including means to test validity of check
By testing material composition
G07D 508
Patent
active
051919567
ABSTRACT:
A method for analyzing analog signals for coin detection comprises establishing, in an analog signal different measurement areas TA, TB, TC, based upon the gradient changes of that signal, to determine a digital signal according to such changes. An electronic circuit is used, which includes an operational amplifier with a time delay that compares the analog signal with the same signal, insignificantly delayed with regard to the signal duration.
REFERENCES:
patent: 4705154 (1987-11-01), Masho et al.
Azkoyen Industrial S.A.
Bartuska F. J.
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