A false bar code inhibitor circuit includes a detector, a signal restore circuit, a comparator, a software controller, and a high impedance clamp circuit. Basically, the detector circuit detects the first transition from either high to low reflectivity or low to high reflectivity. The transition triggers...http://www.google.com/patents/US5382783?utm_source=gb-gplus-sharePatent US5382783 - False bar code inhibitor circuit
