| 摘要 |
PURPOSE: An active pixel sensor(APS) and active pixel sensor circuit is provided to obtain an APS that permits rapid sub-sampling and reset of substantially all of the pixel cells in the array. CONSTITUTION: An APS(10) illustrates a manner of conducting sub-sampling while providing rapid, universal reset of the entire array after sub-sampling. A row and reset signal decode logic(12) propagates a row select and reset signal to each of rows 0,1,4,5,8,9,12,13. A logic(20) causes a reset of rows not read during the sub-sampling procedure. The reset signals generated by logic are generated substantially at the same time as the reset signals for the read rows. The logic is coupled between a number of sub-sampled rows and non-sub-sampled rows. In response to the issuance of a reset signal on row 0 during sub-sample mode, the logic generates a reset signal on row 2. Similarly in response to a reset signal on row 1 during sub-sampling mode, the logic generates a reset signal for row 3. the logic thus acts as a look ahead reset mechanism issuing a reset signal at the Nth + 2 row in response to receipt of a reset signal at the Nth row. In this manner, the entire APS is reset and this reset is achieved in a rapid manner with minimal EMI generation.
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