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KAI-1003-ABA-CD-AE Datasheet(PDF) 5 Page - ON Semiconductor |
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KAI-1003-ABA-CD-AE Datasheet(HTML) 5 Page - ON Semiconductor |
5 / 23 page KAI−1003 www.onsemi.com 5 Output Structure Charge presented to the floating diffusion (FD) is converted into a voltage and current amplified in order to drive off-chip loads. The resulting voltage change seen at the output is linearly related to the amount of charge placed on the FD. Once the signal has been sampled by the system electronics, the reset gate ( fR) is clocked to remove the signal and the FD is reset to the potential applied by the reset drain (RD). More signal at the floating diffusion reduces the voltage seen at the output pin. In order to activate the output structure, an off-chip load must be added to the output pin of the device. Non-Imaging Pixels In addition to the 1024 (H) by 1024 (V) imaging pixels, there are active buffer, light shielded and empty pixels, as shown in Figure 2. A two-pixel border of active buffer pixels surrounds the imaging area. These buffer pixels respond to illumination but are not tested for defects and non-uniformities. Two light shielded rows lead and follow each frame, and 14 light shielded columns lead and follow each line. The light shielded columns are tested for column defects and can be used for dark reference. Only the center 10 columns by 1028 rows of light shielded region on each side can be used for dark reference due to light leakage into the border of two pixels at the edges. Finally, two empty pixels occur at the beginning of each line, which are empty shift register cycles not associated with any vertical CCD columns. Empty pixels may also occur at the end of the line, depending on the timing. Figure 3. Horizontal CCD Registers Dual Outputs In-Phase H1A = H1B = H1C H2A = H2B = H2C Out-of-Phase H1A − 1/2 = H1B = H1C H2A − 1/2 = H2B = H2C Single Output H1A = H1B = H2C H2A = H2B = H1C |
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