33results about How to "Protection output" patented technology

An electrical interface device (10) for towing, operable to facilitate releasably coupling one or more electrical subsystems of a towing vehicle (12) and a towed vehicle, and including associated modular, removable circuitry (24). The circuitry (24) may provide overload, short-circuit, and reverse connection protection and power signal filtering. Alternative or additional circuitry may be added to support other functionality, including interfacing a brake control subsystem. Circular receptacle and flat plug connectors (20,22) are provided to accommodate without modification a variety of electrical connectors. Covers (32,33) are also provided to protect unused connectors from adverse environmental conditions.

A differential bus network, in general, or a controller area network (CAN) driver, in particular, controls and minimizes the variation on the common-mode signal of the CAN bus. This CAN driver also provides improved symmetry between its differential output signals, CANH and CANL, and provides protection for its low voltage devices from voltage transients occurring on its output lines. The common-mode signal is sensed and buffered, then during the dominant to recessive transition, the bus signals are shorted to the buffered common mode voltage. Specifically, additional switches or transistors are used to pull the differential output signals, CANH and CANL, to the common mode signal V_CM when the state of the CAN bus transitions from dominant to recessive. This improvement minimizes high frequency spikes in the common-mode signal and eliminates DC shifts during transitions of the state of the CAN bus. A driver system may include a plurality of CAN drivers are serially interconnected to form a driver system, wherein each downstream driver stage receives a time-delayed form of the digital input signal TxD, each stage providing a time-delayed contribution to the differential output signals of the overall driver system.

A hand-held power tool comprising an output shaft rotatable around a tool axis of rotation, a tool housing portion radially disposed relative to the output shaft, an illuminating element for illuminating a work area of the tool, a lens positioned adjacent the illuminating element, and a cover that secures the lens and the illuminating element to the tool housing portion. At least a portion of the cover is closer to the axis of rotation than the lens is to the axis of rotation.

The invention provides a first in first out storer circuit structure based on a random access memory (RAM) and relates to the field of chip design. A multi-input single-output FIFO structure body is established, a multi-access interface RAM storage body is established through at least three ordinary single-access interface RAM storage bodies, a configurable ranking mode is set, an independent read-write FIFO pointer is set, an FIFO upper overflowing error mark is achieved through a marked vector mark bit corresponding to an address in writing, and an FIFO lower overflowing error mark is output through an unmarked vector mark bit corresponding to the address in reading. By means of a novel FIFO structure, multi-channel message parallel writing FIFO can be directly achieved. Furthermore, automatic ranking can be achieved according to a set mode, serial can be output through FIFO, and a parallel storage function and a serial scheduling function can be automatically achieved.

The present invention relates to a power supply with output protection and a control method of the power supply. The invention mainly provides a pre-protection value lower than a default over-current protection value. When a present output current of the power supply is higher than or equal to the pre-protection value and is lower than the over-current protection value, the method firstly determines whether the power supply has abnormal conditions. When the power supply has abnormal conditions, the method can automatically provide or stop providing a working voltage to a load. When the present output current is further higher than or equal to the over-current protection value, the method takes an over-current protection action. By multi-level monitoring of the current values, the invention properly provides an over-current protection.

An apparatus for supplying an internal combustion engine with a compressed air charge is disclosed. The apparatus includes a first compressing device, for example a turbocharger, and a second compressing device, for example an electric supercharger. The second compressing device is downstream of the first compressing device. A part, for example the bearing assembly, of the second compressing device is thermally shielded from the heat of the compressed air charge by a labyrinth seal.

The invention relates to the technical field of welding, and discloses application of an arc discharging type stud welding technology to a welding tie pole. The defects of the traditional welding technology are overcome, arc discharging type stud welding is creatively introduced to the welding tie pole, and application of the arc discharging type stud welding to the tie pole is provided. The arc discharging type stud welding technology and device are scientifically improved, the arc discharging type stud welding technology is successfully applied to the tie pole, the obvious beneficial effects that the welding deformation is small, the number of adjustment working procedures is greatly reduced, even, adjustment is not needed, no welding splashes exist on the surface, the number of slag removing working procedures is reduced, and the welding defects caused by the manual factors are avoided are achieved, the improvement of product quality is ensured, the breaking phenomenon of the tie pole by a customer is obviously reduced, no wire filling is needed in the welding process, the production efficiency is improved, and the manufacturing cost is reduced.

A circuit for reducing the variations of auto-supply voltage of a control circuit of a switching power supply, where the control circuit supplies an activation or deactivation signal of a power transistor, includes an auto-supply voltage generator, a controlled switch capable of selectively connecting the generator to the control circuit, and a driving circuit of the controlled switch that supplies a closing signal of the controlled switch after a predefined delay of time starting from the deactivation command.

The invention provides an output control system for an audio power amplifier. The output control system for the audio power amplifier comprises a switch module, a voltage division module and a processing module, wherein the switch module is connected with the audio power amplifier and speakers, and is used for outputting audio signals output by the audio power amplifier or preventing from outputting the audio signals to the speakers; the voltage division module is connected with the audio power amplifier and the switch module, and is used for dividing the voltage provided by an external power supply; the processing module is connected with the voltage division module, comprises an analog-to-digital conversion interface and an universal input/output interface, and is used for reading a voltage value which is divided by the voltage division module and is output to the analog-to-digital conversion interface and judging whether the voltage value of the analog-to-digital conversion interface is smaller than a preset voltage threshold; if the voltage value of the analog-to-digital conversion interface is smaller than the preset voltage threshold, the processing module pulls up the voltage of the universal input/output interface and enables the switch module; if the voltage value of the analog-to-digital conversion interface is not smaller than the preset voltage threshold, the voltage of the universal input/output interface is low level, and the processing module disables the switch module. The output control system for the audio power amplifier, which is provided by the invention, can protect the output of the audio power amplifier and prevents external high voltage from damaging the audio power amplifier.

The invention provides a lighting control circuit and signal split-screen conversion lighting equipment with a protection function. The lighting control circuit comprises an input and output unit, a misplug protection unit and a control unit, wherein the input and output unit comprises an input interface module and at least two output interface modules; the input interface module comprises at least three input interfaces; each output interface module comprises at least three output interfaces; the control unit is used for controlling whether a second input interface and each second output interface are conducted or not and controlling the whether a third input interface and each third output interface are conducted or not; and the misplug protection unit is used for controlling the secondinput interface to output a high power supply voltage signal to each first output interface when a low power supply voltage signal is connected to the second input interface, and controlling the second input interface not to output the voltage signal to each first output interface when no signal is connected to the second input interface. According to the lighting control circuit, multiple screenscan be lighted through one lighting device, so that the cost is reduced, an output pin of the lighting device can be protected and the phenomenon of burnout of various to-be-tested display panels isavoided.

An interface circuit configurable in input and output modes comprises a current source; an input/output node; a diode to prevent current from flowing from the input/output node to the current source; a first switch to short-circuit the diode when closed; and a second switch to form a ground path from the input/output node when closed. In input mode, the first switch is closed and the state of a connected sensor circuit may be measured. In the output mode, the first switch is open, and the second switch may be closed to activate an output circuit. In the output mode, power dissipation may be monitored, and the diode may protect the current source and measurement node from current flowing through the output circuit. In the input mode, closing the first switch may prevent the diode from introducing measurement errors due to non-linear attenuation of perturbative AC signals.

The invention discloses a convenient lumbar vertebra exercising device for neurosurgery, and relates to the technical field of neurosurgery auxiliary equipment. An arch plate is movably arranged in anopen groove, end plates are integrally formed in front and back of the left and right edges of the arch plate, a threaded hole is formed in the end plate located at the front end of the left side, aball bearing mounting hole is formed in the end plate located at the front end of the right side, and inserting holes are formed in the end plates at the rear ends of the left and right sides; the right side wall of the end plate is fixed to the right side wall of the open groove, and the left side wall of the end plate movably abuts against the left side of the open groove; an ejector rod is movably arranged at the bottom of the arch plate in an abutting mode and fixed to an output shaft of an electric lifting rod, and the bottom of the electric lifting rod is fixed to the inner bottom wall of a base; a screw rod is arranged in the base in the front of the electric lifting rod, and one end of the screw rod is screwed into the ball bearing mounting hole through a ball bearing. The device has the advantages of simple structure, easy movement, low investment cost, easy popularization, high exercise efficiency, convenient adjustment and stronger applicability.

An ultrasonic probe holder which holds and houses an ultrasonic probe including a head including an output surface which outputs ultrasonic waves and a grip extending from the head includes: a bottom that includes a first opening having a size such that the head and the grip of the ultrasonic probe do not pass therethrough; and a tube that extends from the bottom and includes a second opening having a size such that the head and the grip of the ultrasonic probe pass therethrough at an extended end and a slit connected to the second opening and the first opening on the bottom.