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646 results about "Shoot through" patented technology

Unidirectional mosfet and applications thereof

Owing to the property of bidirectional conduction under the saturation mode, synchronous rectifiers in conventional power converters usually suffer from a reverse current under light loads or a shoot-through current under heavy loads. The reverse current may degrade the converter efficiency and the shoot-through current may damage synchronous rectifiers. The present invention discloses a unidirectional metal oxide semiconductor field effect transistor (UMOS), which comprises a metal oxide semiconductor field effect transistor (MOS), a current detection circuit and a fast turn-off circuit. The current detection circuit detects the direction of the current flowing through the MOS. When a forward current is detected, the fast turn-off circuit is disabled and the channel of the MOS can be formed. When a reverse current is detected, the fast turn-off circuit is enabled and the channel of the MOS cannot be formed. This UMOS can be applied, but not limited, to synchronous rectifiers to detect the occurrence of a reverse current or a shoot-through current and fast turn off the channel of the MOSFET.
Owner:GLACIALTECH +1

Method and system for remotely controlling unmanned aerial vehicle to implement intelligent flight shooting through mobile terminal

The invention discloses a method and a system for remotely controlling an unmanned aerial vehicle to implement intelligent flight shooting through a mobile terminal. The method includes the steps: the unmanned aerial vehicle shoots an image and outputs an image signal; the mobile terminal receives the image signal and performs mode recognition data processing, and a remote control signal is sent to the unmanned aerial vehicle according to processing results; the unmanned aerial vehicle receives the remote control signal and performs intelligent flight shooting according to the remote control signal. The method and the system have the advantages that independently setting a DSP (digital signal processor) on the unmanned aerial vehicle to perform data processing in the prior art is replaced, the overall structure of the unmanned aerial vehicle is simplified, the unmanned aerial vehicle is better in carrying capacity, flight flexibility and cruising power, and fault rate of the unmanned aerial vehicle is decreased.
Owner:ZEROTECH (BEIJING) INTELLIGENCE TECH CO LTD

Instant start electronic ballast with universal AC input voltage

The present invention relates to an electronic ballast that energizes fluorescent lamps connected in a parallel configuration. The ballast employs a power factor correcting boost converter that can be used over a wide range of AC line voltages to provide regulated power to a self-oscillating sine wave inverter that drives the fluorescent lighting load at high frequencies. The inverter employs special networks that limit a certain type of shoot-through current, and thus improve the efficiency of the unit. Also included is a restart circuit that limits power losses during the zero lamp condition, by periodically interrupting the inverter operation when the zero lamp state is detected. To improve operation of the power factor correcting circuitry over the wide range of AC line voltages, a DC offset is added to the sampled AC voltage at the higher AC line voltages by Zener diode based coupling circuit.
Owner:TECHN CONSUMER PRODS

Monitoring image based intelligent parking lot parking place identification method and system

The invention provides a monitoring image based intelligent parking lot parking place identification method and system. The intelligent parking lot parking place identification method comprises a video image collection step which comprises shooting through monitoring cameras in the parking lots to obtain parking place video data; a parking place coordinate calibrating step which is used for achieving calibration of parking place coordinates; an adjacent parking place shield treatment step which comprises dividing parking places into a plurality of subareas, distributing different weight to treat the adjacent parking place shied treatment problem; a sorter design step which is used for judging whether the parking places have cars or not. The intelligent parking lot parking place identification method and system has the advantages of being few in manual intervention and more in monitoring parking places, not needing extra equipment, allowing achievement under a common monitoring camera and accordingly satisfying real-time and efficient management of the parking lots and solving the problem that clients are difficult to park and find the cars.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL

Network driving environment integrated perception model based on convolutional and hollow convolutional structure

A network driving environment integrated perception model based on a convolutional and hollow convolutional structure simultaneously realizes object detection and semantic segmentation. A video imageof a road environment is shot through a forward-looking camera system mounted on a vehicle. The residual network model is used to get the bottom feature map of the image. The converged network is designed, which includes two sub-modules: object detection and semantic segmentation. The two modules share the bottom feature map. Among them, the object detection module is responsible for predicting the confidence level of the object frame and the category, and the semantic segmentation module is responsible for predicting the pixel level of each category. The appropriate loss function is selectedfor each of the two modules, and the perceptual model tends to converge in both modules after alternate training. Finally, the joint loss function is used to train the two modules simultaneously to get the final perceptual model. The model can simultaneously complete object detection and semantic segmentation with small computation amount, and the perceptual model uses a large amount of data of object detection to assist the semantic segmentation module to learn the image distribution law.
Owner:SOUTHEAST UNIV

Ground wire patrol checking robot of high voltage power line

InactiveCN101196551AEasy and flexible control operationAchieve positioningTransmission systemsFault locationTransceiverEngineering
The invention discloses a robot for conducting the groundwire polling of the high-tension transmission line, which is composed of an on-wire creeper part and an off-wire image receiving control part. The on-wire creeper part comprises a dual-wheel and double-arm suspension tackle, on-wire traveling vehicle body synchronously driven by single motor, a left and a right cameras mounted on the vehicle body, two image transmitters, wireless duplex communication control circuit, remote-control transceiver and battery. The off-wire image receiving control part is formed by a two-way image receiver, a two-way image grabbing card, an industrial-controlled machine, and a remote-control transceiver. The on-wire creeper part is suspended on the groundwire of the high-tension transmission line to conduct real-time shooting through the two-way cameras equipped on it, and then send the image shot to the off-wire image receiving control part through the wireless image transmitters; the off-wire image receiving control part receives the image signal, send the signal into the computer to conduct the image display and process, send command signals to the on-wire creeper part over the air so as to control the operation of the on-wire creeper part.
Owner:北京深浪电子技术有限公司

Method for fast configuring remote video monitoring system

The invention discloses a method for fast configuring a remote video monitoring system. The method comprises the steps that (1) a wireless network access module is arranged on a monitoring camera; (2) currently available wireless networks are scanned by a monitoring client, a wireless network is selected and a wireless network password is input; (3) after receiving authentication information of the monitoring client, a monitoring server sends a safety verification code to the monitoring client; (4) the monitoring client converts an access point name, the password, the safety verification code and the authentication information to a two-dimension code picture, and the two-dimension code picture is placed in a shooting area of the monitoring camera; (5) the two-dimension code picture is shot through the monitoring camera and is analyzed, the monitoring camera has access to the wireless network, and an equipment serial number, the safety verification code and the authentication information of the monitoring camera are then sent to the monitoring server; (6) authentication is conducted on the monitoring client by the monitoring server according to information sent by the monitoring camera, and when the certification is passed, the monitoring camera and the monitoring client are bound to enter a monitoring module.
Owner:INST OF SOFTWARE - CHINESE ACAD OF SCI +1

Systems and methods for automatically adjusting channel timing

Systems and methods for automatically adjusting the alignment of high-side and low-side pulse width modulated signals to improve dead time and shoot-through conditions. In one embodiment, a system includes a digital amplifier controller, an amplifier output stage coupled to the controller and configured to receive audio signals from the controller, and one or more sensors coupled to the output stage. The sensors are configured to detect and / or measure various parameters, such as shoot-through current and distortion, which are associated with the operation of the output stage. The sensors provide feedback to an internal processor or modulator of the controller, which then adjusts the timing of the high-side and low-side signals to improve the operating conditions of the output stage by minimizing shoot-through current and / or distortion.
Owner:INTERSIL INC

Full screen, terminal equipment and manufacturing method of terminal equipment

InactiveCN107707695AAchieve screen-to-body ratioSolve the problem of being interfered by lightTelevision system detailsColor television detailsTerminal equipmentEngineering
The invention discloses a full screen, terminal equipment and a manufacturing method of the terminal equipment. The full screen comprises an LCM (LCD Module) assembly, a TP cover plate and a light shading part, wherein the TP cover plate is attached to the LCM assembly; the LCM assembly is provided with a mounting groove for embedding a camera; the light shading part covering the camera is arranged in the mounting groove, and used for covering a shooting area in which light emitted by the full screen enters the camera; and a through hole is formed in a position which corresponds to a lens of the camera on the light shading part, so that the camera can be used for shooting through the through hole. According to the full screen, the terminal equipment and the manufacturing method of the terminal equipment disclosed by the invention, a display screen can be isolated through the light shading part, thereby completely solving the problem that the camera is interfered by light. Moreover, a small space is occupied, and the screen-to-body ratio of the full screen is realized better. In addition, the problem concerned with falling reliability testing or fuzzy stress on the camera caused byinterference due to dispensing in the prior art are solved, and the technical problem of complicated dispensing process is solved. Moreover, the full screen has the beneficial effect of simple assembling process and low cost.
Owner:NUBIA TECHNOLOGY CO LTD

Automatic reminding method and device for self-timer composition of intelligent terminal

The invention discloses an automatic reminding method and device for self-timer composition of an intelligent terminal. The automatic reminding method includes that step 1, a user specifies a human face target area or calculates the composition position through default classic composition; step 2, the user starts shooting and automatic human face detection is performed on camera lens preview data; step 3, the human face position and size is compared with the human face target position and size to determine whether the current human face position is appropriate or not; step 4, if not, the user moves up and down, left and right and forward and back according to a voice prompt; step 5, otherwise, the user keeps still according to a voice prompt and a photograph is automatically taken. The automatic reminding method and device for the self-timer composition of the intelligent terminal can help the user obtain satisfying composition conveniently and intelligently when the user shoots through a rear camera lens.
Owner:THUNDERSOFT

Display with function of initializing brightness data of optical elements

When the scanning line turns high and the first transistor turns on to write luminance data, a potential corresponding to the luminance data in the organic light emitting diode is set in both the gate electrode of the second transistor. At the same time, the fourth transistor turns on, and the electric charge in the anode of the organic light emitting diode is pulled out to ground potential by way of the fourth transistor. Also, at the same time, the third transistor turns off, so that any shoot-through current from the power supply line Vdd will be prevented. Thus the potential at the anode of the organic light emitting diode becomes the same as the ground potential. Thus, the luminance data already present in the optical element is initialized.
Owner:SANYO ELECTRIC CO LTD

Method and device for shooting panorama and electronic device

The invention provides a method and device for shooting a panorama and an electronic device. The method includes the following steps: rotating a shooting device in a first direction, and simultaneously detecting rotating angles of the shooting device; recording the rotating angles of the shooting device in the first direction and controlling the shooting device to shoot a plurality of first images whenever the rotating angles exceed a preset threshold; and when the shooting device finishes rotating in the first direction, splicing the plurality of shot first images according to the recorded rotating angles in the first direction so as to generate the panorama in the first direction. According to the embodiment of the method, panorama combination is conducted on a plurality of images by recording the rotating angles through the shooting device, a precise panorama can be obtained without a complex combining algorithm, combining efficiency of the panorama is improved, and a scene image of different rotating angles can be shot through a single shooting device. The cost is low, operation is simple and easy to conduct, and user experience is improved.
Owner:BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD

Voltage Sag Corrector Using a Variable Duty Cycle Boost Converter

A sag corrector apparatus for providing voltages temporarily (ride-through) to a load during momentary electrical disturbances in the power supply line. In one embodiment, the disclosed apparatus compensates for voltage sags by using a variable duty cycle boost converter to boost the sagged line voltage to resemble desired voltage levels during occurrence of voltage sags. The boosted voltage available to a connected load during a sag depends on a sequence of operation of various control pulses. Duty cycle of the boost converter is controlled by changing the width (duration) of the control pulses. To prevent voltage shoot-throughs from over-boosting, an energy clamp circuit is provided to dissipate excess energy. Embodiments of the sag corrector circuit can be additionally integrated with power protection functions.
Owner:I EWM ACQUISITION LLC

Converter circuit and control method for same

In known converter circuits switching losses occur, which are caused by reverse-recovery currents of a freewheeling diode. To reduce said switching losses it is proposed by the invention to drive the switching elements such that, upon switching from the second to the first switching element, the timing is controlled in such a manner that the shoot through currents and the conduction of the freewheeling diode are kept at a low value or, better still, are precluded. As regards the control mechanism, it is proposed to turn on the first switching element later if shoot through currents occur, and to turn on the first switching element sooner if conduction of the freewheeling diode occurs. Here, a time of overlap may be provided during which both switching elements are simultaneously conducting. For the control mechanism, the voltage across a switching element can be used as a measured input value.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV

Touch read method and system based on augmented reality technology

The invention discloses a touch read method and system based on an augmented reality technology. According to the main technical scheme, the touch read method includes the steps that images are shot through an image collection unit, one or more frames of images in the shot images are selected, one or more visual marks are loaded on the selected images, and a user can select and lightly touch one of the one or more visual marks, so that a service request at least used for obtaining a resource corresponding to the selected visual marks is output and / or a control command at least used for enabling the selected functional unit to execute the selected action is output. According to the touch read method and system, by the adoption of the augmented reality technology based on image recognition, any book or object or occasion can be combined with multiple types of multi-media information to be displayed, and thus the better and interactive experience can be provided for users.
Owner:SUZHOU MXR SOFTWARE TECH

Article automatic identification commercial barcode electronic scale and article automatic identification method

The invention discloses an automatic article identification commercial barcode electronic scale and an article automatic identification method, an object which is placed on the scale pan is shot through a camera, then is subjected to feature recognition, the product information is judged, and the barcode is automatically printed. According to the invention, a large amount of labor cost can be saved, weighing operation can be automatically completed by equipment, 20 electronic scales only need 1 to 2 employees to maintain, so that the labor cost of the merchants is greatly reduced. By means ofthe electronic scale and method, the transaction speed can be increased, the waiting time of clients can be shortened, the phenomenon that people needs to wait in a long queue at the weighing positionwhen shopping in a supermarket always troubles the consumers, the waiting time of the customers can be greatly shortened, a large part of work is completed inside the system, the customers only needto place the articles on the scale pan, the system automatically identifies the article information and completes weighing and pricing, the price label is printed, manual input is not needed in the whole process, the time is saved, and the shopping experience of the clients is improved.
Owner:深圳仪普生科技有限公司

Soft Switching DC/DC Converters and Methods

A soft switching apparatus comprises an energy recovery channel formed by two diodes in series connection and a resonant tank formed by an inductor and a capacitor. The soft switching apparatus is coupled to the primary side of a bridge converter. An energy transfer process during L-C resonance helps to reduce the amplitude of the current flowing through the inductor in a freewheeling period. Furthermore, the soft switching apparatus can help to reduce the voltage stress across the secondary switching devices as well as the shoot-through currents flowing through the secondary switching devices, and thus enabling the reduction or elimination of dead time in a secondary synchronous rectifier control scheme.
Owner:HUAWEI DIGITAL POWER TECH CO LTD

Supply-state-enabled level shifter interface circuit and method

An enable circuit receives an input enable signal that is referenced to a first voltage and generates a level-shifted output enable signal referenced to a second voltage. Bias control circuitry prevents shoot-through currents during ramping of the first voltage and from causing indeterminate logic levels of the level-shifted output enable signal. An enabled level-shifting circuit receives an input logic signal that is referenced to the first voltage and generates a level-shifted output logic signal referenced to the second voltage. Enable circuitry operates in response to the level-shifted output enable signal to enable normal level-shifting operation while the first and second voltages are at normal operating levels and prevents shoot-through currents in the enabled level-shifting circuit from causing indeterminate levels of the level-shifted output logic signal.
Owner:TEXAS INSTR INC

Method and system for calibrating camera for lane offset early warning

The invention discloses a method and system for calibrating a camera for lane offset early warning. The method comprises the following steps that a calibration plate including calibration patterns is arranged at a first position in front of a vehicle, the central axis of the calibration plate and the central axis of the vehicle are made to be collinear, and the calibration plate is shot through a camera to be calibrated to obtain a first calibration image; the calibration plate is moved to a second position in front of the vehicle, the central axis of the calibration plate and the central axis of the vehicle are made to be collinear, and the calibration plate is shot through the camera to be calibrated to obtain a second calibration image; the coordinate values of a calibration point in the calibration patterns are obtained through calculation according to the first calibration image and the second calibration image, and the camera to be calibrated is calibrated according to the coordinate values of the calibration point. By means of the method and system for calibrating the camera for lane offset early warning, the operand of image processing and manual measurement parameters in an early stage are reduced, the site and the steps for calibration are simplified, the calibration time is shortened, so that the calibration precision and the calibration working efficiency of the camera are improved, and the method and system are suitable for large scale flow line production operation in large vehicle factories.
Owner:SHANGHAI RAPTOR AUTOMOTIVE CO LTD

PWM-based DC-DC converter with assured dead time control exhibiting no shoot-through current and independent of type of FET used

A control circuit for a switch mode DC-DC converter contains an arrangement of monitored LGATE, UGATE and PHASE node condition threshold detectors, outputs of which are processed in accordance with a switching control operator to ensure that each of an upper FET (UFET) and a lower FET (LFET) is completely turned off before the other FET begins conduction, thereby maintaining a dead time that exhibits no shoot-through current and is independent of the type of switching FET.
Owner:INTERSIL INC

System and method for monitoring of sleep security

The invention provides a system for monitoring sleep security based on human body detection. In the system, the image of the sleeping human body is shoot through an infrared / near-infrared camera, the part of the human body in the monitoring area in the image is analyzed to determine if the sleeper kicks a quilt or not, if the sleeper is close to the edge of the bed or not, if the sleeper falls off the bed or not, if the sleeper wakes up or not and the like, then alarm is performed according to the analyzing result. The infrared / near-infrared light source has no influence on the human body, thereby having no interference to the sleeping of the user.
Owner:WUXI ZGMICRO ELECTRONICS CO LTD

Maximum power tracking device for solar cell of miniature satellite power system and control method thereof

The invention discloses a maximum power tracking device for a solar cell of a miniature satellite power system and a control method thereof. The maximum power tracking device comprises a control unit and a plurality of power output units. The control unit adjusts the working mode of a corresponding DC-DC conversion module according to input voltage and output voltage collected by an information collection module in one power output unit, if the work is in a boosting mode or a step-down mode, the control unit carries out MPPT control according to the output power of the present moment and the last moment, and if the DC-DC conversion modules have failures, and corresponding failure mode modules are opened. According to the maximum power tracking device, based on one control unit, a plurality of the DC-DC conversion modules can be controlled in a centralized mode, the step-down mode, the boosting mode and the shoot-through mode of the DC-DC conversion modules can be achieved, the modes of the failure mode modules can be switched by the control unit when the DC-DC conversion modules have failures, and therefore connection from the input end to the output end can be guaranteed.
Owner:ZHEJIANG UNIV

Method and device for measuring length of object through camera

ActiveCN103591894AConvenience highlightsUsing optical meansComputer graphics (images)Computer vision
The invention discloses a method and device for measuring the length of an object through a camera. The method comprises the steps that the object to be measured is shot through the camera; according to the rule of the focal length and imaging, a corresponding scale is generated on a screen displaying the image shot by the camera, so that a ruler is formed; a user compares the object to be measured on the screen with the scale, and therefore data such as the length of the object to be measured and the width of the object to be measured can be obtained. A user does not need to find a ruler to actually measure the object to be measured. Specially, when the method and device for measuring the length of the object through the camera are applied to a smart phone, the user can obtain the length of any object just by taking out the smart phone carried with the user, and therefore convenience is remarkable.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD

Real image blind denoising method based on deep residual network

The invention provides a real image blind denoising method based on a deep residual network. According to the method, an RGB spatial clear image set is selected through an image dataset, and an RGB spatial image group set is constructed through spatial transformation; images under multiple scenes are shot through multiple cameras, and real image groups are constructed according to real clear images and real noisy images shot by each camera under each scene, and a real image group set is constructed; multiple RGB spatial image groups in the RGB spatial image group set and multiple real image groups in the real image group set are randomly selected to construct an image training set, and a preprocessed image training set is obtained through preprocessing; remaining RGB spatial image groups in the RGB spatial image group set and remaining real image groups in the real image group set are used to construct an image test set; and the preprocessed image training set is used as input to construct an image denoising residual convolutional neural network, the neural network is trained in combination with residual learning and a batch normalization strategy, and the image test set is denoised. The method has the advantages that convergence speed is high, and the denoising effect is good.
Owner:WUHAN UNIV

Line crossbow conversion kit and hybrid compound bow

A kit is provided to convert a compound archery bow into a left or right handed inline (vertical limb) crossbow. The conversion kit includes a mounting plate attachable to a side of the bow riser section to hold a socket to receive a draw-lock bar which can be removed for take-down and storage. The draw-lock bar has a series of laterally spaced bolt holes to attach a grip with a trigger release latch assembly at a selectable draw length. The bar can be rotated and attached to either side of the bow, and the trigger and grip can be reposition within the trigger housing for left, right or horizontal shooting. The string latch assembly has an anti-dryfire lever that is only moved from the blocking position when an arrow is nocked. The kit also provides a hinged cocking stirrup, and a front hand vertical grip on the riser side opposite the draw-bar socket. Also disclosed is a dedicated hybrid compound bow for dedicated use with kit as an inline or traditional crossbow. The hybrid compound bow is made especially. The hybrid bow has no forehand grip, and has a shoot through riser to provide vertical and horizontal centering of the arrow to the string.
Owner:GOFF JERRY +1

Calibration method of projector

The invention discloses a calibration method of a projector. The calibration method comprises steps of providing a calibration plate; providing a structure optical three-dimensional detection system; using a first type of circle to right the calibration plate; in an effective range of the calibration plate, shooting pictures on the calibration plate, projecting coding strips to the calibration plate and shooting through the projector, and repeating the step for at least twice; carrying out phase position calculation on each group of images with strips to obtain horizontal and longitudinal absolution phase position values of centre point positions of each group of the calibration plate images, using a circular point extraction algorithm to calculate center point pixel coordinates on the calibration plate images and combining the horizontal and longitudinal absolution phase position values and the center point pixel coordinates to obtain an absolute phase position value of each centre point; and converting the absolute phase position value of each centre point of the calibration plate into pixels of the projector from pixels of a camera, thereby achieving calibration of the projector. According to the invention, the three-dimensional structure optical scanning measurement system is enabled to achieve measurement of workpieces in different sizes with no need to change various kinds of calibration plates, and the calibration method is suitable for three-dimensional detection of micro elements in different sizes.
Owner:GUANGDONG UNIV OF TECH +1

Semiconductor device with a voltage detecting device to prevent shoot-through phenomenon in first and second complementary switching devices

An HNMOS transistor (4) has its drain electrode connected to the gate electrode of an NMOS transistor (21), and a logic circuit voltage (VCC) is applied to the drain electrode of the NMOS transistor (21) through a resistor (32). A ground potential is applied to the source electrode of the NMOS transistor (21). A drain potential (V2) at the NMOS transistor (21) is monitored by an interface circuit (1), for indirectly monitoring a potential (VS). Thus provided is a high voltage integrated circuit for preventing damage to a semiconductor device used for performing bridge rectification of a power line.
Owner:ARIGNA TECH LTD

Image detection-based on-line detection and correction method of reflection angle of heliostat

The invention discloses an image detection-based on-line detection and correction method of a reflection angle of a heliostat. Firstly, the heliostat to be corrected and a solar facula image in the heliostat are shot through a camera, the obtained image is processed, whether the solar facula image is positioned in the central position of the heliostat or not is judged, and if the solar facula image is positioned in the central position of the heliostat, the camera is aligned with the heliostat to be corrected; otherwise, the reflection angle deviation Theta of the heliostat is calculated according to the offset of the solar facula image from the central position of the heliostat, and a normal direction of the heliostat is controlled to rotate towards a direction in which the deviation is eliminated at an angle of half the Theta; and secondly, a declination angle Theta' between an angle for the camera to be aligned with the heliostat and an angle for the heliostat to be aligned with a heat collector is calculated, and the heliostat already aligned with the camera is rotated towards the heat collector for half the Theta'. By adopting the method, the heliostat can be accurately aligned with the heat collector when a static field is mounted, and errors caused by mechanical deformation and foundation settlement during long-term running of the static field can be corrected.
Owner:赵跃

Power converter with current vector controlled dead time

In one embodiment, a method is provided for a power converter system comprising a switching circuit having a plurality of switches operable to be turned on and off to cause current to flow to deliver power to a load. The method includes the following: generating PWM control signals for turning on and off the switches in the switching circuit; sensing the direction of current flow, wherein the direction of current flow is related to a likelihood of shoot-through in the switching circuit; providing a current vector signal indicative of the direction of current flow; and enabling or disabling introduction of a dead time into the PWM control signals for the switches in the switching circuit in response the current vector signal.
Owner:SEMICON COMPONENTS IND LLC
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