Circuit and method for correcting influence of AC coupling

Registers – Coded record sensors – Particular sensor structure

Reexamination Certificate

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Details

C327S033000, C327S091000, C235S462480

Reexamination Certificate

active

06935564

ABSTRACT:
A systems and method generate a progressively corrected scan signal, the progressively corrected scan signal having a magnitude independent of spectral reflectance from a background near a target. One of the methods involves generating a baseline signal by sampling light reflected from the target and background before transmitting a light scan at the target, generating a detected signal by receiving light reflected from the target and background while transmitting the light scan at the target, and subtracting the baseline signal from the detected signal to form the progressively corrected scan signal. One circuit embodiment produces an average level independent output signal from an input signal subject to fluctuations in average level.

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