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A precise timing system that consists of two delay-locked loops (DLLs) is proposed to align the sampling phases of the time-interleaved ADC (TI-ADC) with the front-end Sample and Hold (S/H) clock. DLL1 using bang-bang phase detector (PD) handles the 1 GHz system clock and DLL2 produces 32 phases to generate the non-overlapped clock in the followed 4 pipeline ADCs. A new self-calibration scheme in...
Hemodialysis machine, regarded as an important clinical application of regular dialysis therapy, is a necessary equipment for the treatments of uremia patients as well as blood poisoning patients. Currently, medical device manufacturers as well as metrology measurement agencies in China usually use hemodialysis machine detectors as the commonly accepted functional calibration equipment for hemodialysis...
Ventilator is the one of the most important means to save critical patients, which is widely used in ICU as well as other respiratory therapy fields. At present, medical device manufacturers as well as metrology institutes in China usually use ventilator tester as the commonly accepted functional calibration equipment for ventilator. Thus, there is an increasing concern on the accuracy of ventilator...
A combined co-vibrating vector hydrophones prototype was designed and manufactured based on the actual demand of engineering, which has a dimension of Φ54×72mm, taking on an irregular shape of a cylinder with two half ball caps on each end of the cylinder, with the working frequency band 20 ∼ 5000Hz, and the average density is 1200kg/m3. Its performance was measured in both standing wave calibrator...
Omnidirectional vision (omni-vision) with a fisheye lens holds promise of various applications such as global surveillance, robotic navigation and so on. The calibration for the vision system and correction for the distorted image are critical procedure. One method for calibrating the omni-vision system is proposed. The approach involves the utilities of a cylinder on which inner wall there are several...
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