| 摘要 |
<p>A flicker detecting device for detecting flicker noise in a CMOS (complementary metal-oxide-silicon) image sensor is provided. A flicker detecting pixel unit includes a 1 X 1 single pixel and reads and compares signals with respect to time change or in brightness of a fluorescent lamp from a fixed flicker detecting pixel by performing image sensing for a predetermined charge integration time. An analog-to-digital converter converts an analog output of the flicker detecting pixel unit into a digital value. A memory temporarily stores sampled odd digital data output from the analog-to-digital converter. An odd/even comparator compares sampled even digital data output from the analog-to-digital converter with the sampled odd digital data output of the memory and outputs comparison result. A shift register shifts a resultant value based on the comparison result of the odd/even comparator. A comparator determines whether there is a constant alternating current pattern or flicker is detected by comparing the resultant values of the shift register.</p> |
