67results about How to "Inhibition spikes" patented technology

A power device such as a forward converter employing a main switch in series with a power transformer coupling an input, primary circuit and an output, secondary circuit has its transformer reset from a reset capacitor that is switched. Switching of the reset capacitor is effected by a reset switch, preferably a MOSFET, the control electrode of which is driven from a reset winding on the power transformer. Current flow between the reset capacitor and the primary winding resets the transformer. The capacitor can be chosen such that flux density in the transformer core is substantially symmetrical about zero. Leakage and magnetizing conductance energy is recycled. Large spikes are not produced across the main switch.

The invention provides a method and structure for preventing lateral interdiffusion between metal and silicon layers and a micro-electromechanical structure. The method includes the following steps: firstly, a substrate including a plurality of metal patterns is provided. Next, a silicon oxide layer, a silicon nitride layer, a silicon oxynitride layer, titanium nitride or aluminum oxide is formed on the spacer of the metal pattern to prevent the lateral interdiffusion between the metal pattern and the subsequent silicon layer.

The invention discloses a laser control circuit. The laser control circuit comprises at least two laser tubes and a control unit respectively controlling the at least two laser tubes. The control unit transmits control signals to the at least two laser tubes to control the at least two laser tubes to be turned on / off; the control unit comprises a main pulse signal generator and a logic control unit; the main pulse signal generator, the logic control unit and the at least two laser tubes are sequentially connected, the logic control unit divides the control signals into control signals different in type and transmits the signals to the at least two laser tubes, so that the at least two laser tubes are in different working states. By the adoption of the technical scheme, the laser tubes can be controlled more flexibly, working currents of the laser tubes are reduced and are more stable and continuous, and therefore the phenomenon of peak interference is avoided.

The invention discloses a valve stent safe to use and a valve replacement device with the same. The valve stent comprises a tubular supporting net rack and a flaring section connected to the end of the supporting net rack. The flaring section is connected with all end nodes of the corresponding side of the supporting net rack. The flaring section is located at the initial releasing end of the valve stent. The outer edge of the flaring section is formed by a plurality of bent supporting strips. The end nodes, corresponding to the supporting strips in position, of the supporting net rack are connected with the supporting strips. The structure of an existing memory alloy self-expanding valve stent is improved, isolated rhombus peaks existing at the non-end portion of the valve stent are eliminated, the phenomenon that spines appear after the valve stent is compressed is avoided while the original structural mechanical property is kept, and the problem that a sheathing canal is damaged by spines is fundamentally solved.

Disclosed are methodology and corresponding apparatus subject matters for providing improved efficiency in the collection of data from a large number of metrology devices associated with an Automated Meter reading (AMR) network. AMR network operation produces randomly spaced transmissions from individual nodes in the network. When an AMR system wishes to retrieve data from a large number of points over an AMR network, a broadcast or multicast request is transmitted to appropriate nodes. A time window is defined either in such request or in the devices themselves such that start and end offsets from the time of the request are received by the node. The start offset provides a quiet period to insure request delivery to all the appropriate nodes. The end offset provides a time by which the requested data must be returned. Responses are sent randomly within the window established by the start and stop offset times.

A valve for use in aircraft comprises a body, a selective interrupter positioned inside the body for rotation therein, a flow arrangement between the selective interrupter and the body, a bonnet connected to the body and in contact with the selective interrupter, an arm extending through the bonnet and connected to the selective interrupter, and an actuator movably connected to the arm.

The embodiment of the present invention provides an LED drive circuit and a liquid crystal display device which can control an LED lamp string current accurately. The LED drive circuit comprises an LLC resonance circuit module, a full-bridge rectifier filtering module, an LED lamp string module, a current detection circuit module, a control circuit module and a driving transformer. The output endof the LLC resonance circuit module is connected with the input end of the full-bridge rectifier filtering module, the output end of the full-bridge rectifier filtering module is connected with the positive pole of the LED lamp string module, and the first end of the current detection circuit module is connected with the negative pole of the LED lamp string module and the first end of the controlcircuit module; the second end of the current detection circuit module is grounded, the second end of the control circuit module is connected with the secondary first end of the driving transformer, the third end of the control circuit module is connected with the secondary second end of the driving transformer, and the primary of the driving transformer is connected with the LLC resonance circuitmodule. The LED drive circuit and the liquid crystal display device of the present invention are suitable for the liquid crystal television field.