80results about How to "Reduce ringing" patented technology

Apparatus is provided that includes an annuloplasty system for use on a subject. The system includes an annuloplasty ring, which includes a sleeve having a lumen, and at least one anchor, shaped so as to define a coupling head and a tissue coupling element, which tissue coupling element is shaped so as to define a longitudinal axis, and is configured to penetrate cardiac tissue of the subject in a direction parallel to the longitudinal axis. The system further includes an anchor deployment manipulator, configured to be removably positioned within the lumen of the sleeve, and, while so positioned, to deploy the tissue coupling element from a distal end of the deployment manipulator through a wall of the sleeve into the cardiac tissue in the direction parallel to the longitudinal axis of the tissue coupling element and parallel to a central longitudinal axis through the distal end of the deployment manipulator.

An LED backlighting system including: a control circuit; a power source; at least one LED string associated with the power source, the at least one LED string being arranged to be switchably connected to alternatively draw an illumination current from the power source and not draw an illumination current from the power source; and a controlled bleeder arranged to draw a bleed current from the power source responsive to the control circuit; the control circuit being operative to draw the bleed current from the power source via the controlled bleeder for a predetermined time period associated with the alternatively drawing and not drawing the illumination current of the at least one LED string.

A method includes positioning an anchor deployment manipulator at least partially within a lumen of a sleeve of an annuloplasty ring, the sleeve having a lateral wall shaped to define the lumen, and the lumen extending longitudinally along a length of the sleeve. A portion of the sleeve that contains a distal end of the deployment manipulator is placed into an atrium in a vicinity of an annulus of an atrioventricular valve. An anchor is deployed from the distal end of the deployment manipulator through the lateral wall of the sleeve into cardiac tissue, while the distal end of the deployment manipulator is positioned such that a central longitudinal axis of the deployment manipulator through the distal end of the deployment manipulator forms an angle of between 45 and 90 degrees with the lateral wall of the sleeve at a point at which the anchor penetrates the lateral wall.

A method and apparatus for reducing motion blur in a motion blurred image are provided. The method includes blurring a guess image based on the motion blurred image as a function of blur parameters of the motion blurred image. The blurred guess image is compared with the motion blurred image and an error image is generated. The error image is blurred and pixels in the blurred error image are weighted based on the steepness of edges proximal to corresponding pixels in the motion blurred image. The blurred and weighted error image and the guess image are combined thereby to update the guess image and correct for motion blur.

A switching power supply unit is provided, in which core loss in a transformer or a level of heating due to AC resistance of the transformer can be reduced. A switching power supply unit has a transformer, an inverter circuit and a rectifier circuit. In a secondary side of the transformer, secondary wirings are connected to each other. In a primary side of the transformer, primary wirings are connected in series to each other, and connected to the inverter circuit to allow them to be driven in a time-divisional manner in phases opposite to each other in response to operation of the inverter circuit. The rectifier circuit has diodes connected to the secondary wirings to allow the secondary wirings to be driven in a time-divisional manner in phases opposite to each other in response to operation of the inverter circuit.

A ringing reduction apparatus includes image restoration means for restoring an input image with image degradation to the image with less degradation using an image restoration filter; and weighted average means for performing weighted average of the input image and the restoration image obtained by the image restoration means. In the ringing reduction apparatus, the weighted average means performs the weighted average of the input image and the restoration image such that a degree of the input image is strengthened in a portion where ringing is conspicuous in the restoration image, and the weighted average means performs the weighted average of the input image and the restoration image such that a degree of the restoration image is strengthened in a portion where ringing is inconspicuous in the restoration image.

A snubber circuit for use with a DC / DC converter broadly comprises a snubber resistor connected in parallel with a snubber inductor. The DC / DC converter may include a voltage source, a first switching element, a second switching element, an output inductor, and an output capacitor. The voltage source may include a positive terminal and a negative terminal connected to a ground node. The first switching element may include a first terminal connected to the positive terminal of the voltage source The second switching element may be connected to a second terminal of the first switching element. The series combination of the output inductor and the output capacitor may be connected between the second terminal of the first switching element and the ground node. The snubber circuit may be connected between the second switching element and the ground node.

A receiving device includes a receiving circuit and an impedance control circuit. The receiving circuit receives a signal transmitted through a communication line. The impedance control circuit is coupled with the receiving circuit and has a detecting part. The detecting part detects a physical value of the signal and the physical value includes at least one of a voltage, an electric current, and an electric power. The impedance control circuit changes an input impedance based on the detected value so that a ringing of the signal is reduced.

A drumhead tone control device employs an annular configuration of polyester film tightly adhered to the periphery of a drumhead membrane. The annular configuration of the tone control device includes radial and / or circumferential relief. The relieved tone control device disrupts transmission of vibrations reflected from the drumhead membrane / drum shell interface. Disruption of reflected vibrations improves the overall tonal quality of the drumhead while use of a tightly adhered polyester sheet close to the periphery of the drumhead playing surface minimizes undesirable alteration of the attack characteristics and fundamental tone of the drumhead.

A multifocal display for rendering a 3D scene as a series of 2D images. In one aspect, the multifocal display includes a display, an optical imaging system, a refractive focus actuator and a controller. The display renders the 2D images. The optical imaging system is image-side telecentric and creates an image of the display. The refractive focus actuator is positioned at the pupil of the optical imaging system. Thus, adjusting the refractive focus actuator alters a location of the image of the display but does not significantly alter a size of the image. The controller coordinates adjustment of the refractive focus actuator with rendering of the 2D images on the display. The waveform driving the focus actuator is preferably designed to reduce ringing and jitter effects.

A system and method for damping undesired motion of a suspended structure that is connected by one or more flexures that have an elastic limit to a fixed structure in a MEMS sensor, wherein the undesired motion is caused by a high G acceleration pulse. At one or more of before and during a high G acceleration pulse that could move the suspended structure beyond the elastic limit of a flexure, the system actively generates an attractive force that acts to counteract motion of the suspended structure caused by the high G acceleration pulse, so as to maintain motion of the suspended structure within the elastic limit of the flexure.

Embodiments disclosed herein include receiver optical assemblies (ROAs) having a photo-detector remotely located from a differential transimpedance amplifier (TIA). Related components, circuits, and methods are also disclosed. By providing the photo-detector remotely located from a TIA, additional costs associated with design constraints of providing the photo-detector intimate with a TIA may be avoided, thereby reducing cost of the ROA. In this regard as a non-limiting example, the ROAs according to the embodiments disclosed herein allow shorter haul active optical cable applications for use in consumer applications from a cost standpoint with the added benefits of increased bandwidth and low noise performance of optical fiber. In this regard, the ROAs disclosed herein provide higher input impedance differential TIA circuits and transmission circuits inhibiting or reducing ringing effects and maintain a sufficiently low resistance-capacitance (RC) time constant for differential TIA circuit to allow for higher bandwidth operation of the ROA.

A lighting device includes: a DC / DC converter including two switching elements connected in series and a resonant circuit connected to a connection point between the two switching elements; and a control unit configured to control driving of the two switching elements. The control unit is configured to: perform intermittent driving in which a switching period and a non-switching period are alternately repeated, the switching period being a period in which the control unit switches ON and OFF the two switching elements respectively and inversely; and the non-switching period being a period in which the control unit stops switching ON and OFF the two switching elements; and provide, in an initial part of the switching period, a frequency gradual decrease period in which a driving frequency for driving the two switching elements is gradually decreased.

The invention discloses a circuit connected with a switching power supply. The circuit is characterized in that an absorption circuit comprises a switching power supply voltage peak suppression circuit used for changing a switching power supply voltage peak into an expected voltage peak, an energy storage circuit connected with the switching power supply voltage peak suppression circuit and used for storing the suppressed peak voltage, and a release circuit connected with the energy storage circuit and used for releasing the energy which is stored by the energy storage circuit and higher than an output voltage to the output end of the switching power supply when the voltage stored by the energy storage circuit is higher than the output voltage of the switching power supply. The invention also discloses the corresponding switching power supply and a corresponding LCD (Liquid Crystal Display) drive circuit.

An improved method for manufacturing a vaned diffuser (101) of a turbocharger, preferably from aluminum or an aluminum alloy, where the vaned diffuser possesses at least one axis (115) suitable for separating the vaned diffuser from its rigid mold by translation. Casting of a raw vaned diffuser (407) having an optional central hub (205) and, optionally, ribs on the hub (209), is disclosed in a plaster mold (305). The hub and optional ribs are machine finished from the raw vaned diffuser to yield the finished vaned diffuser (101). The method provides the high degree of dimensional accuracy, and high quality surface finish, required to produce a vaned diffuser of an efficient turbocharger.

A semiconductor device module includes a wiring substrate, a plurality of stacked semiconductor devices and a damping impedance circuit. The plurality of stacked semiconductor devices are provided on the wiring substrate and connected with a signal in a stubless manner, and each of the plurality of stacked semiconductor devices comprises a plurality of semiconductor chips which are stacked. The damping impedance circuit is provided for a transmission path of the signal for an uppermost semiconductor chip as the furthest one, from the wiring substrate, of the plurality of semiconductor chips of a first stacked semiconductor device as one of the plurality of stacked semiconductor devices which is first supplied with the signal.

A semiconductor power device includes a plurality of power transistor cells each having a trenched gate disposed in a gate trench opened in a semiconductor substrate wherein a plurality of the trenched gates further include a shielded bottom electrode disposed in a bottom portion of the gate trench electrically insulated from a top gate electrode disposed at a top portion of the gate trench by an inter-electrode insulation layer. At least one of the shielded bottom electrode is connected a source metal and at least one of the top electrodes in the gate trench is connected to a source metal of the power device.

An N-channel transistor is provided as a switch between a high potential power line and a low potential power line. A high-pass filter is constituted by a capacitor and a resistor. When a voltage between the high potential power line and the low potential power line is started to oscillate by a switching operation, the high-pass filter causes a high-pass component thereof to pass, thereby turning ON the N-channel transistor to reduce a ringing.

The present embodiments relate generally to power controllers, and more particularly to synthetic current hysteretic control of a buck-boost DC-DC controller. In one or more embodiments, a controllerincludes PFM-PWM and Buck-Boost transitions with minimal circuitry and power consumption.

A method and apparatus for damping an ultrasonic transducer suitable for time of flight ranging and level measurement systems. The ultrasonic transducer comprises a damping component which absorbs vibrations in the transducer to reduce the ringing effect. The damping component is subjected to plasma etching to produce a surface which readily bonds to component(s) of the transducer. According to one aspect, the damping component is formed from an inert elastomer, such as silicone rubber, and the transducer component is made of stainless steel.

A method of minimizing edge reflections of vibrational waves in a flat panel speaker assembly for a stereo device by characterizing the impulse response of the flat panel and associated components in response to a test signal to produce a cancellation signal, and applying the cancellation signal for each stereo channel to the opposing stereo channel.

Embodiments disclosed herein include receiver optical assemblies (ROAs) having a photo-detector remotely located from a differential transimpedance amplifier (TIA). Related components, circuits, and methods are also disclosed. By providing the photo-detector remotely located from a TIA, additional costs associated with design constraints of providing the photo-detector intimate with a TIA may be avoided, thereby reducing cost of the ROA. In this regard as a non-limiting example, the ROAs according to the embodiments disclosed herein allow shorter haul active optical cable applications for use in consumer applications from a cost standpoint with the added benefits of increased bandwidth and low noise performance of optical fiber. In this regard, the ROAs disclosed herein provide higher input impedance differential TIA circuits and transmission circuits inhibiting or reducing ringing effects and maintain a sufficiently low resistance-capacitance (RC) time constant for differential TIA circuit to allow for higher bandwidth operation of the ROA.

A semiconductor module includes: a first metal plate including a first mount part joined with a bottom-surface electrode of a first switching element, a second mount part joined with a positive-electrode terminal, and a first narrow part between the first and second mount parts and being narrower than a part jointing the first switching element to the first mount part and the positive-electrode terminal; a second metal plate being joined with a bottom-surface electrode of a second switching element, and connected to a top-surface electrode of the first switching element; a third metal plate including a sixth mount part joined with a negative-electrode terminal, a seventh mount part connected to a top-surface electrode of the second switching element, and being narrower than the negative-electrode terminal, and a second narrow part between the sixth and seventh mount parts; and a snubber circuit connecting the first and second narrow parts.

An N-channel transistor is provided as a switch between the high-potential power supply line and the low-potential power supply line. A high pass filter consists of capacitors and resistors. When the voltage between the high-potential power supply line and the low-potential power supply line starts to oscillate through switching operations, the high-pass filter passes the high-pass component of the voltage, thereby turning on the N-channel transistor to reduce ringing.

The embodiment of the invention provides an exception handling method and a server in a calling continuous process, relating to the communication field. The method comprises the steps of detecting whether a calling user terminal generates an exception after receiving a calling request message sent by the calling user terminal; if the calling user terminal is detected to generate the exception, disassembling the calling from the calling user terminal to a called user terminal, and releasing the related resource of the calling. In the invention, by detecting whether the calling user terminal generates the exception in the calling handling process, and disassembling the calling from the calling user terminal to the called user terminal when the calling user terminal is detected to generate the exception, and releasing the related resource of the calling, the cost of a calling system can be reduced, and the feeling of a called user can be improved, the unnecessary calling can be reduced, and the mistakenly billing in the calling handling process can be prevented by finding the exception and disassembling the calling in time under a cross local network and cross operator calling situation.