Pulse width detection circuit for electro-optical label reading

Details Pulse width detection circuit for electro-optical label reading Pulse width detection circuit for electro-optical label reading

1975-06-02

1976-12-21

Cook, Daryl W.

Registers

Calculators

Input-output calculator to indicator, printer, etc.

328147, 3401463K, G06K 714, H04B 104

Patent

active

039990435

ABSTRACT:
A circuit for producing an output pulse of predetermined amplitude and a width equal to the mid amplitude width of an input pulse from an electro-optical label reading system is provided. The present circuit comprises delay line means having a first output terminal and a second output terminal with the signal at the second output terminal being delayed twice the time of the delay at the first terminal. The first output terminal of the delay line is connected to an amplifier operative to double the amplitude of the signal applied thereto. The output of the amplifier is connected to one input of each of first and second comparators with the other input to the comparators respectively connected to the input signal source and the second terminal of the delay line. The output of the comparators is connected to the input to an AND gate with the output from the AND gate providing the desired pulse width information.

REFERENCES:
patent: 2866896 (1958-12-01), Stampfl
patent: 3299271 (1967-01-01), Stites
patent: 3668532 (1972-06-01), Potash

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