Abstract: The present disclosure includes circuits and methods for controlling the operation of a switching regulator. Closing and opening high side and low side switches may be controlled so that an inductor current may be used to charge and/or discharge an intermediate switching node when both switches are open. In one embodiment, delays between a low-to-high transition and a high-to-low transition of an AC stage may be cycled over multiple periods of a DC stage.

Abstract: The invention relates to a secure system for the perfusion of a body liquid, enabling a final control of compatibility of a treatment with the patient and/or the medical situation previously diagnosed by a doctor, in a simple, efficient and energy-saving manner. To this end, the system includes a fluidic circuit of a perfusion having a perfusion catheter, a perfusion tubing and a container for the determined perfusion product to be perfused to a patient. The system is also configured to take a body liquid sample from a patient and to analyze and compare the body liquid sample to the determined perfusion product so as to control the flow of the perfusion product.

Abstract: The invention relates to a device (200) for taking a sample of a body fluid, such as blood, to be incorporated into a fluid circuit of a perfusion (100) of a patient who has a perfusion catheter (104), said device having a tubular structure (202) for connecting to the fluid circuit of the perfusion, provided with a zone for intubation, during use, of a sampling channel (300) comprising a distal end (301); and a means (203) for holding, during use, in the tubular structure, the part of the sampling channel (300) comprising a distal end (301) in such a way that the distal end (301) is oriented towards the perfusion catheter (104), in the direction of flow (F1) of the perfusion product (102), from a perfusion product reservoir (101) towards the perfusion catheter (104).

Abstract: The present disclosure includes switching regulator circuits and methods. In one embodiment, a first switching regulator stage receives a first input voltage and produces a first voltage on a first node. A second switching regulator stage receives the first input voltage and produces a second voltage on a second node. A capacitor includes a first terminal coupled to the first node and a second terminal coupled to the second node, and the first switching regulator stage and the second switching regulator stage are configured to set a first voltage on the first node and to set a second voltage on the second node.

Abstract: A switching regulator circuit can include multiple switching regulator stages coupled to an output. A first switching regulator stage may be operated at a different frequency than a second switching regulator stage. In some cases, one switching regulator stage is operated at a different duty cycle. The switching regulator circuit may also include multiple switching regulator stages that cancel ripple at an output node.

Abstract: The present disclosure includes switching regulator circuits and methods. In one embodiment, cross coupled circuits are provided. In one embodiment, a first switching regulator stage has an output coupled to a first node, and a second switching regulator stage has an output coupled to a second node. The first switching regulator stage includes a feedback input coupled to the second node, and the second switching regulator stage includes a feedback input coupled to the first node. The first and second nodes may be coupled together through a capacitor.

Abstract: The present disclosure includes circuits and methods for controlling the operation of a switching regulator. In one embodiment, the present disclosure includes a circuit comprising a switching regulator with a current control loop comprising a capacitor configured to store a first voltage during a first phase and configured to boost a voltage produced by an output current through a low side switching device by the first voltage in a second phase. Circuitry compares the boosted voltage to a control voltage produced by a control current through a replica device corresponding to the low side switching device.

Abstract: The present disclosure includes switching regulator circuits and methods. In one embodiment, cross coupled circuits are provided. In one embodiment, a first switching regulator stage has an output coupled to a first node, and a second switching regulator stage has an output coupled to a second node. The first switching regulator stage includes a feedback input coupled to the second node, and the second switching regulator stage includes a feedback input coupled to the first node. The first and second nodes may be coupled together through a capacitor.

Abstract: Embodiments of the disclosure include high slew rate switching regulator circuits and methods. In one embodiment, switching regulators are coupled to an output node. A first switching regulator may drive the output node. A second switching regulator may drive the output node through a capacitor. Control circuitry may include feedback inputs to maintain a first voltage on the output of the first switching regulator on one terminal of the capacitor and further to maintain a second voltage on the output of the second switching regulator on the other terminal of the capacitor.

Abstract: The present disclosure includes circuits and methods for controlling the operation of a switching regulator. Closing and opening high side and low side switches may be controlled so that an inductor current may be used to charge and/or discharge an intermediate switching node when both switches are open. In one embodiment, delays between a low-to-high transition and a high-to-low transition of an AC stage may be cycled over multiple periods of a DC stage.

Abstract: The present disclosure includes circuits and methods for controlling the operation of a switching regulator. In one embodiment, the present disclosure includes a circuit comprising a switching regulator with a current control loop comprising a capacitor configured to store a first voltage during a first phase and configured to boost a voltage produced by an output current through a low side switching device by the first voltage in a second phase. Circuitry compares the boosted voltage to a control voltage produced by a control current through a replica device corresponding to the low side switching device.

Abstract: The present disclosure includes switching regulator circuits and methods. In one embodiment, multiple switching regulator stages are coupled to an output. A first switching regulator stage is operated at a different frequency than a second switching regulator stage. In another embodiment, one switching regulator stage is operated at a different duty cycle. Embodiments of the present disclosure may include multiple switching regulator stages that cancel ripple at an output node.

Abstract: The present disclosure includes switching regulator circuits and methods. In one embodiment, a first switching regulator stage receives a first input voltage and produces a first voltage on a first node. A second switching regulator stage receives the first input voltage and produces a second voltage on a second node. A capacitor includes a first terminal coupled to the first node and a second terminal coupled to the second node, and the first switching regulator stage and the second switching regulator stage are configured to set a first voltage on the first node and to set a second voltage on the second node.

Abstract: Apparatus having corresponding methods comprise: a first switching regulator coupled to an output node; a second switching regulator coupled to the output node through a capacitor, wherein the capacitor comprises a first terminal coupled to the output node, and a second terminal coupled to the second switching regulator; and a master controller configured to control a voltage on the output node, wherein the master controller comprises a first feedback input coupled to the first terminal of the capacitor, and a second feedback input coupled to the second terminal of the capacitor; wherein the master controller is further configured to control a voltage on the second terminal of the capacitor.

Abstract: A method and apparatus for dating a body sample, for example a sample of body fluid involves taking a series of spectroscopic measurements of the sample, each measurement in the series including at least two predetermined positions in the spectrum. The positions have spectral characteristics corresponding to two or more predetermined substances present in the sample that have a time varying relationship with each other. The measurements in the series are spaced in time. A concentration of each of the substances present in the sample is then determined from each of the spectroscopic measurements at each point in time. Next, a ratio of the concentrations of the two predetermined substances at each point in time is determined and then the ratios of the concentrations of the two predetermined substances over time are analyzed to estimate when the concentrations of the two substances were at a limit of their concentrations, thereby providing an indication of the age of the sample.

Abstract: The disclosed embodiments of voltage regulators incorporate a current mode control architecture. In one embodiment, a comparator mechanism triggers a transition in a power switch when the error in the regulated output voltage is equal to a proportionally scaled value of current provided at an output filter. The voltage regulator includes a power switch having an input and an output. The power switch is configured to provide a first voltage during a first conduction period and a second voltage during a second conduction period. An output filter is coupled between the power switch output and an output terminal to be coupled to a load. A comparator mechanism has a reference input coupled to a reference voltage, a feedback input coupled to sense a feedback voltage at the output filter, a current sensing input coupled to sense a current sensing voltage corresponding to a current provided to the output filter, and an output in communication with the power switch input.

Abstract: The invention relates to a secure system for the perfusion of a body liquid, enabling a final control of compatability of a treatment with the patient and/or the medical situation previously diagnosed by a doctor, in a simple, efficient and energy-saving manner.

Abstract: The invention relates to a device (200) for taking a sample of a body fluid, such as blood, to be incorporated into a fluid circuit of a perfusion (100) of a patient who has a perfusion catheter (104), said device having a tubular structure (202) for connecting to the fluid circuit of the perfusion, provided with a zone for intubation, during use, of a sampling channel (300) comprising a distal end (301); and a means (203) for holding, during use, in the tubular structure, the part of the sampling channel (300) comprising a distal end (301) in such a way that the distal end (301) is oriented towards the perfusion catheter (104), in the direction of flow (F1) of the perfusion product (102), from a perfusion product reservoir (101) towards the perfusion catheter (104).

Abstract: The invention relates to a disposable device comprising all of the reagents necessary for the detection of one or more particles of interest, and which can be incorporated in a detection system including simple means for the automatic management of fluids. For this purpose, the invention relates to a disposable device for the detection of one or more particles of interest present in a liquid sample, said device comprising a substrate provided with: a chamber for capturing the particle(s) of interest to be detected; a fluid channel connecting, upstream, the capture chamber to a buffer solution container, a liquid sample injection means and a container of labelling probes that can be secured to the particle(s) of interest to be detected; and a fluid channel connecting, downstream, the capture chamber to a container for the recovery of liquids which, during use, can flow from the capture chamber.