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213results about How to "Minimize disturbance" patented technology

System and method for determining vital sign information

In a system and method for determining vital sign information of a subject the subject is illuminated with radiation, and radiation reflected from the subject is received. A region of interest is located in a first phase. Said illumination is controlled to locally illuminate, in a second phase, the located region of interest with radiation allowing determination of vital sign information. Finally, vital sign information of the subject is determined from the radiation reflected from said region of interest and detected in said second phase.
Owner:KONINKLJIJKE PHILIPS NV

Bandwidth control in a mostly-digital pll/fll

InactiveUS20090108891A1Minimize disturbanceFaster frequency switching timePulse automatic controlLoop filterLoop bandwidth
Methods and apparatus for controlling a controlled oscillator using a phase-locked loop (PLL) or frequency-locked loop (FLL) having a digital loop filter with programmable filter parameters. An exemplary PLL (or FLL) includes a digital loop filter having one or more of the programmable filter parameters, which are changed by increments during operation in order to minimize disturbances (e.g., settling transients) as the loop bandwidth of the PLL is varied from a narrow loop bandwidth to a wide loop bandwidth, or vice versa. By changing the loop filter parameters in increments the loop bandwidth can be varied with substantially no perturbation. The end result is a much faster frequency switching time, improved settling dynamics, and predictable and stable loop operating performance. According to another aspect of the invention, one or more of the programmable filter parameters are changed in order to oppose a change in tuning sensitivity of the controlled oscillator (e.g., in order to maintain a constant loop bandwidth). By holding the loop bandwidth constant, switching time is maintained substantially constant under all conditions. This allows design and production margins to be reduced in a frequency agile system, and also relaxes the tuning sensitivity linearity requirements of the controlled oscillator.
Owner:PANASONIC CORP

Device for removing fluid from blood in a patient

ActiveUS20090234266A1Lower blood pressureImprovement in patient health and quality of life and patient morbidity and mortalityMembranesHaemofiltrationUltrafiltrationHollow fibre membrane
An ultrafiltration device and method for the removal of excess fluid in hypervolemic patients and / or removal of toxins in the blood including for patients suffering from either renal or cardiovascular disease is disclosed. An embodiment of the device includes a housing containing multiple large bore hollow fiber membranes which are connected to the patient's vascular system via a connecting element comprising bifurcated fluid pathway elements to physiologically channel the blood flow either to or from each hollow fiber membrane of the device, a channel to direct the fluid removed by the device to a suitable collection container or the patient's bladder, and controls that control excessive removal of the water from the patient. Devices can be either worn extracorporeally or surgically implanted in order to allow for continuous fluid removal with ambulatory freedom.
Owner:FRESENIUS MEDICAL CARE HLDG INC
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