Patent ID: 7311259

Claim:
A bar-code reader comprising: a first circuit board having a photodiode connected to an amplifier which is connected to an A/D converter which receive light reflected from a bar code and convert the light received to an electric digital signal; and a second circuit board having a processing unit, a first digital signal processor (DSP) and a second DSP are connected to the processing unit, in which the processing unit receives the electrical digital signal and converts the electrical digital signal to character data representing the bar code and transmits the character data to a POS terminal, wherein the first circuit board is separate and distinct from the second circuit board and the first circuit board is positioned in the bar code reader so as to optimize the reception of light reflected from the bar code, wherein the position of the first circuit board is placed in the bar code reader irrespective of the position of the second circuit board, wherein the first DSP extracts edge information from this digital signal and inputs the edge information to the second DSP which reproduces a pattern of black lines and white lines of the bar code.