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This paper presents a novel two-step pixel-level analog-to-digital converter (ADC) design, which is embedded in a 17μm-pitch pixel for Infrared Focal Plane Array (IRFPA). Digitization includes two successive steps: the first is reciprocal and the second linear. With the reciprocal conversion, a high dynamic range is achieved, and the linear conversion, on the other hand, guarantees a suitable frame...
A low-noise MEMS vibration gyroscope interface is presented in this paper. A novel capacitance to voltage (C/V) conversion structure is introduced, which consists of a fully differential capacitor bridge and an active filtering net. An auto-calibration method is proposed, which can compensate the gyroscope mismatch to less than 2fF. We use a multistage noise shaping (mash) sigma-delta modulator to...
This paper presents a low-noise single-ended open-loop switched-capacitor interface circuit in 0.35μm CMOS technology for a comb structure micro-accelerometer. Using correlated double sampling, the low-frequency noise of the charge sensitive amplifier and the gain stage is suppressed, whereas the noise of the sensor charging reference voltage and the sample-and-hold circuit which follows the gain...
Many kinds of methods are used to denoising every type of noising. However in this paper we find that even the same kind of noising has different perception of image quality distortion in each color component. In order to know the perception distortion of noising in color components, several simple discrepancy measurements are calculated for each channel of different color space, such as Euclidean...
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