System and method for noise reduction in a bar code signal
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United States of America Patent
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May 26, 2015
Grant Date -
Aug 1, 2013
app pub date -
Feb 1, 2012
filing date -
Feb 1, 2012
priority date (Note) -
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Abstract
A system and method for reading a bar code are disclosed which may include transmitting light pulsed at a selected frequency to illuminate the bar code; converting light received at the bar code reader from the bar code into an electrical signal; transmitting the electrical signal through a signal conditioning circuit to filter and amplify the electrical signal, to thereby provide a conditioned electrical signal; sampling the conditioned electrical signal at the selected frequency; removing energy due to light scattering within a housing of the bar code reader from the sampled, conditioned electrical signal; generating one of a logical “1” and a logical “0” output based on a value of the signal generated by the step of removing; and resolving output from the step of generating into data indicative of information on the bar code.
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