Patent ID: 6011257
Filing Date: 2000-01-04
Classification: G01J,H04N

Abstract:
A compensation circuit for infrared sensors in pixels included in an image sensor, said compensation circuit comprising:a detecting means being connected to said infrared sensor for detecting variations in resistance of said pixels, said detecting means having a controller for controlling a current flowing though said infrared sensor;a storing means being connected to said detecting means for storing said detected variations in resistance of said pixels as variation data;a calculating means being connected to said storing means for calculating a variation coefficient for each pixel based upon said variation data; anda multiplexing means being connected to said calculating means for multiplexing said variation coefficient and a reference value having been predetermined to obtain a compensation signal, said multiplexing means being also connected to said controller in said detecting means for transmitting said compensation signal to said controller for feed-back control of said current flowing through said infrared sensor.