An electrical output signal from an electro-optical code reader is amplified (U1) to develop a first signal which is applied to a positive peak detector (U2D1, C2) and a negative peak detector (U3, D2, C3). The positive peak detector provides a second signal whose voltage level follows that of the first...http://www.google.fr/patents/US4335301?utm_source=gb-gplus-shareBrevet US4335301 - Wave shaping circuit for electro-optical code readers
Wave shaping circuit for electro-optical code readers
