Registers – Coded record sensors – Particular sensor structure
Patent
1996-10-18
1998-09-22
Hajec, Donald T.
Registers
Coded record sensors
Particular sensor structure
235463, G06K 710
Patent
active
058117822
ABSTRACT:
A binary device suitable for a bar code reader performs a binary signal conversion, without depending on a laser beam scanning rate. The binary device includes differentiating circuitry for differentiating an analog signal including a binary code signal, peak point detecting circuitry for detecting the positive and negative peak points of a differential signal from the differentiating circuitry, first gate signal outputting circuitry for outputting a first gate signal when the differential signal is more than a first preset level, second gate signal outputting circuitry for outputting a second gate signal when the differential signal is less than a second preset level, positive peak point detection sequential circuitry for detecting a positive peak point from the peak point detecting circuitry when a signal variation in the first gate signal is detected, and negative peak point detection sequential circuitry for detecting a negative peak point from the peak point detecting circuitry after a change in the second gate signal is detected.
REFERENCES:
patent: 5061843 (1991-10-01), Sato et al.
patent: 5068520 (1991-11-01), Sato
patent: 5142130 (1992-08-01), Sato
patent: 5268564 (1993-12-01), Metlitsky et al.
patent: 5272323 (1993-12-01), Martino
Iwaguchi Isao
Kashiwazaki Tomoyuki
Sato Shin'ichi
Shinoda Ichiro
Fujitu Limited
Hajec Donald T.
Tremblay Mark
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