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A new approach to denoise chaotic signals based on ensemble empirical mode decomposition (EEMD) is proposed. The EEMD technique is first used to decompose the noisy chaotic signal into the so-called intrinsic mode functions (IMFs). A criterion is proposed to determine which modes are used to reconstruct the denoised signal. Computer simulations are used to demonstrate the effect of the method. The...
For low-light-level imaging, the performance of a CMOS image sensor (CIS) is usually limited by the temporal readout noise (TRN) generated from its analog readout circuit chain. Although a sub-electron TRN level can be achieved with a high-gain pixel-level amplifier, the pixel uniformity is highly impaired up to a few percent by its open-loop amplifier structure [1]. The TRN can be suppressed without...
<para> This paper presents a CMOS imager sensor with pinned-photodiode 4T active pixels which use in-pixel buried-channel source followers (SFs) and optimized row selectors. The test sensor has been fabricated in a 0.18- CMOS process. The sensor characterization was carried out successfully, and the results show that, compared with a regular imager with the standard nMOS transistor...
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