Abstract: The present disclosure provides at least one hemostasis valve, an introducer, and a retrieval device. The hemostasis valve may include a sealing member, a pressing assembly and a rotary motion assembly. The sealing member may be configured to define a sealing cavity which is transversely contractible. The pressing assembly is disposed at an outer periphery of the sealing member. The pressing assembly is configured for linear motion in a transverse direction of the sealing cavity to change a dimension of the sealing cavity. The rotary motion assembly is coupled to the pressing assembly, and the rotary motion assembly may be configured to convert rotary motion into the linear motion of the pressing assembly through the coupling. The hemostasis valve of the present disclosure can perform active hemostasis sealing for one or more medical devices and is convenient to use.

Abstract: A circuit and method for reducing voltage oscillations at the output leads of a digital integrated circuit. A circuit for reducing voltage oscillations on the output leads of a digital integrated circuit comprising a positive voltage charge pump unit coupled to an output driver, a negative voltage charge pump unit also coupled to the output driver and a sense and control unit coupled to both the negative voltage charge pump unit and the positive voltage charge pump unit is presented. The sense and control unit is configured to determine whether switching current is present in the source or drain of the output driver. If switching current is present in the source, then the sense and control unit is further configured to connect the positive voltage charge pump unit to the source. If switching current is present in the drain, then the sense and control unit is still further configured to connect the negative voltage charge pump unit to the drain.

Abstract: A multiphase power supply that minimizes losses during a low power mode+. In a particular embodiment, a multiphase power supply may include a plurality of switching regulators coupled in parallel with respect to one another. The multiphase power supply further comprises a phase control circuit coupled to each of the switching regulators. The phase control circuit is configured to generate a plurality of control signals for controlling the switching of the switching regulators so that they are out of phase with respect to one another. During the low power mode of operation of the microprocessor, the phase control circuit is configured to selectively suspend operation of a subset of switching regulators by removing or disabling at least one of the plurality of control signals to each of the subset of switching regulators.