CIRCUIT FOR PREPROCESSING BAR CODE SCANNER

摘要

The circuit includes a boundary limitter (12) for transmitting enable signal when bar code value Ty is existing on bar code standard (KSC 5810), a character counter (13) for detecting half field utilizing a guard bar detector (15) and a center bar detector (14) and for applying reset signal to data memory (10) so that incomplete bar code data is eliminated, a main memory (102) for storing data from a buffer (101) by control signal from a microprocessor (16), and a control unit (103) for applying control signal to a buffer (101).