Bar code processing and detecting system

Claim 1

A bar code reading and processing system including a. a linear array of light sensitive sensor cells; b. a plurality of individual pre-amplifiers for amplifying individually the output of each of said cells of said array; c. a plurality of inverters for inverting the output of a portion of said plurality of pre-amplifiers; d. a plurality of summing amplifiers for adding the non-inverted outputs and the inverted outputs of said plurality of preamplifiers; e. a plurality of parallel connected diodes each in the output circuit of one of said plurality of summing amplifiers; and f. a quantizer circuit connected to said plurality of diodes, said quantizer circuit including g. a pair of parallel connected amplifying circuits both connected to the output of said plurality of diodes, said pair of amplifying circuits including h. a first amplifying circuit having a capacitor charged through a diode and means for short-circuiting said diode in intervals of time; i. a second amplifying circuit including a delay line; and j. a comparator having a pair of inputs of which one is energized by said first amplifying circuit and the other is energized by said second amplifying circuit.