30results about How to "Avoid radio frequency interference" patented technology

The invention provides a temperature adjustment device and method of a focusing ring. Energy is radiated onto the focusing ring by plasma and is downwards transferred to a base by a first thermal conduction pad, an insulation ring and a second thermal conduction pad, the first thermal conduction pad is in contact with a lower surface of the focusing ring, the insulation ring is in contact with a lower surface of the first thermal conduction pad, the second thermal conduction pad is in contact with a lower surface of the insulation ring, the base is in contact with the second thermal conduction pad, cooling and temperature reduction are performed by a cooling system arranged at the base, a heater which is arranged in a shielding ring is started to generate a controllable external heating source, the shielding ring is connected with the ground, energy of the external heating source is transferred to the focusing ring by the shielding ring, a third thermal conduction pad, an insulation ring and the first thermal conduction ring, the third thermal conduction pad is in contact with the shielding ring, the insulation ring is in contact with the third thermal conduction pad, and controllable temperature rise is performed on the focusing ring. By providing a good heat conduction cooling path and by combining a heating mode of a controllable parameter, fine control on a working temperature of the focusing ring is achieved, the focusing ring is tunable during etching, so that the process demand is satisfied.

The present invention is a stereo PA amplifier that is mounted inside a desktop computer. It is powered by the computer's 12-volt power supply and receives its input via a stereo mini cable from the computer's audio line out. Standard 8-ohm, non-powered speakers are then hooked up directly to the board via its speaker connector board. The volume of the present invention is adjusted by the computer's volume controls. The device eliminates the need for an external stereo amp and external mixer, which thereby reduces the installation time, cost, interconnecting cables, and the space needed for the overall computer system, while at the same time providing quality sound.

The present invention provides a method and system for avoiding terminal radio frequency interference. The terminal supports a first mode and a second mode; a first frequency band in the first mode and a second frequency band in the second mode interfere with each other. The method comprises: when the terminal initiates a first service, if the first service is initiated at the first frequency band, querying whether an ongoing second service works in the second frequency band; if the second service works in the second frequency band, setting the first frequency band to a disabled state, and sending to a network side information of the first frequency band set to the disabled state. The above method and system for avoiding terminal radio frequency interference do not require any change on the network side or addition of signaling between the network and the terminal. The radio frequency interference can be avoided by just using related messages in the existing network, and frequency band resources can be saved, thereby improving the utilization rate of the high-frequency band resources.

The invention provides a composite board and application thereof as a composite material for a fireworks and crackers transport vehicle carriage. The composted board proved by the invention comprises an armor plate, a polymer cellular material layer, a glass fiber reinforcement resin composite layer and an electric-conduction elastic alloy layer. The armor plate and the polymer cellular material layer can be bonded together with unsaturated polyester resin doped with reinforced fibers. The polymer cellular material layer and the glass fiber reinforcement resin composite layer can be bonded together with a polyurethane adhesive. The glass fiber reinforcement resin composite layer and the electric-conduction elastic alloy layer can be bonded together with polyamide viscoelastic resin. The composite board provided by the invention has the characteristics of light weight and high strength and multiple functions of retarding flames, insulating heat, attenuating the vibration of explosive blasts, conducting and dissipating static electricity and preventing radio frequency. The fireworks and crackers transport vehicle carriage made of the composite boards can sufficiently guarantee the transportation safety of explosives, such as fireworks, crackers and the like.

This invention relates to a shell of a double-conjugated L-shaped large power electronic ballast including: a lower L-shaped shell, an upper L-shaped shell, a first side cover, a second side cover, two convex / concave points, in which, the two L-shaped shells in a same shape and size form a master shell by conjugating the two points, the end surfaces of both sides of the master shell are square, the two side covers are fixed at the cross sections of both ends and the two conjugated points are in the shape of the nominal convex / concave .

The present invention discloses a plasma processing apparatus, which comprises a reaction chamber. An upper electrode and a lower electrode are arranged in the reaction chamber. A power supply device is arranged below the lower electrode and is used for applying a radio frequency (RF) power to the lower electrode. A pipeline and an electric wire are arranged below the lower electrode. The power supply device comprises a hollow RF conveying pipeline. The pipeline and the electric wire are arranged inside the hollow RF conveying pipeline. In this way, the space inside the lower electrode is greatly saved, so that other parts can be improved in the larger space of the lower electrode. Meanwhile, a liquid conveying pipeline, a gas conveying pipeline and electric wires, which are made of soft materials, are placed inside the RF conveying pipeline of a relatively fixed shape. Therefore, the influence of the distance change between the RF conveying pipeline and a grounding ring, due to the change in shape or position during the process, on the electric field distribution inside the reaction chamber, can be avoided.

An ignition system (10) for an internal combustion engine has a power supply, a transformer (22) having first and second primary windings (32 and 33) and a secondary winding (30), extending from the secondary winding and adapted to A connector for terminal connection of a spark plug (18) of an internal combustion engine, and an electronic ignition timing circuit (42) cooperating with a transformer to activate and deactivate voltage to the first and second primary windings. The first and second primary windings are connected to the power supply such that the transformer produces an AC voltage output from the secondary windings between 1 kHz and 100 kHz and at a voltage of at least 20 kV. A forced push-pull inverter (82) works in conjunction with an electronic ignition timing circuit to fix the frequency of the voltage to the first and second primary windings.

The invention discloses a differential audio system supporting single-ended signals and a control method. The system includes an audio access module and a differential signal processing module; wherein, the audio access module includes a P input end, an N input end, a P input output terminal and N output terminal; the differential signal processing module includes a P input terminal and an N input terminal; the audio access module is used to receive audio signals from the external audio equipment and control the differential signal processing module. The working state of the N input terminal is also used to convert the single-ended signal into a differential signal when the audio signal is a single-ended signal. By using the embodiments of the present invention, the differential audio system can support single-ended signal input while avoiding signal loopback and radio frequency interference.