摘要:
A method for modifying the resonance frequency of a micro-mechanical resonator, and resonators on which the method is practiced. A packaged resonator is trimmed by directing electromagnetic energy to the resonator through a transparent portion of the package. The removal of mass (by the energy) affects the resonance frequency of the resonator in a predictable manner. In some embodiments, the energy is sourced from a femtosecond laser. In some variations of the illustrative embodiment, the amount of mass to be removed is determined as a function of its location on the resonator. A mass-trimming map is developed that identifies a plurality of potential mass-trimming sites on the resonator. A site can be classified as a fine-tuning site or a coarse-tuning site as a function of the degree to which mass removal at those sites affects the resonance frequency. The sites can also be characterized as a function of their position relative to features of the resonator (e.g., nodal lines, etc.). Based on a differential between the measured and desired resonance frequency of the resonator, and expressions that relate resonance frequency to location-dependent mass, actual sites for mass removal are selected from among of the plurality of potential mass-trimming sites.
摘要:
A method for modifying the resonance frequency of a micro-mechanical resonator, and resonators on which the method is practiced. A packaged resonator is trimmed by directing electromagnetic energy to the resonator through a transparent portion of the package. The removal of mass (by the energy) affects the resonance frequency of the resonator in a predictable manner. In some embodiments, the energy is sourced from a femtosecond laser. In some variations of the illustrative embodiment, the amount of mass to be removed is determined as a function of its location on the resonator. A mass-trimming map is developed that identifies a plurality of potential mass-trimming sites on the resonator. A site can be classified as a fine-tuning site or a coarse-tuning site as a function of the degree to which mass removal at those sites affects the resonance frequency. The sites can also be characterized as a function of their position relative to features of the resonator (e.g., nodal lines, etc.). Based on a differential between the measured and desired resonance frequency of the resonator, and expressions that relate resonance frequency to location-dependent mass, actual sites for mass removal are selected from among of the plurality of potential mass-trimming sites.
摘要:
A method for modifying the resonance frequency of a micro-mechanical resonator, and resonators on which the method is practiced. A packaged resonator is trimmed by directing electromagnetic energy to the resonator through a transparent portion of the package. The removal of mass (by the energy) affects the resonance frequency of the resonator in a predictable manner. In some embodiments, the energy is sourced from a femtosecond laser. In some variations of the illustrative embodiment, the amount of mass to be removed is determined as a function of its location on the resonator. A mass-trimming map is developed that identifies a plurality of potential mass-trimming sites on the resonator. A site can be classified as a fine-tuning site or a coarse-tuning site as a function of the degree to which mass removal at those sites affects the resonance frequency. The sites can also be characterized as a function of their position relative to features of the resonator (e.g., nodal lines, etc.). Based on a differential between the measured and desired resonance frequency of the resonator, and expressions that relate resonance frequency to location-dependent mass, actual sites for mass removal are selected from among of the plurality of potential mass-trimming sites.
摘要:
A memory control unit in a memory system including a plurality of memory banks generates row and column address and address strobe signals, on a cycle-by-cycle basis, responsive to a intermediate memory address and control signals provided by a memory bank comparator indicating whether a memory address is valid, which one of the memory banks is being addressed, the type of memory bank being addressed, and whether memory bank interleaving is possible. The memory control unit includes a row and column address assignor which provides the row and column addresses in response to the intermediate memory address and the memory bank comparator. A memory bank selector is also responsive to the intermediate memory address and the memory bank comparator to provide the row and column address strobe signals to the proper memory bank. A memory unit is arranged to permit the row and column address strobe signals to drive equal loads to preclude strobe signal timing skew and the need for external buffers.
摘要:
A system and method for monitoring usage of peripheral devices and placing a second peripheral device in a low power state when the usage indicates that a second peripheral device is not being used. For example, if a computer system detects that a user's current typing rate indicates the user probably has both hands on a keyboard, the computer system may generate a signal to the computer mouse to enter a low power state. The computer system may use prior usage for a user to determine when current usage indicates that the second peripheral device is not being used. After the second peripheral device is placed in a low power state, the computer system may generate a signal to the second peripheral device to return to a normal power state when the computer system determines that the user no longer has both hands occupied.
摘要:
The present invention is directed toward a novel container system that is designed to hold and store liquids, such as for example, paints, stains, and various other coatings. The container system generally includes a base member, a shelf that is contained within the base member, and a lid. The shelf is provided with the base member and is designed to accept an application device, such as for example a paint roller. A lid is also provided with the container so that a fluid may be provided and stored as part of an all-inclusive delivery system.
摘要:
There are provided novel compounds of formula (I) ##STR1## wherein R.sup.1 represents a 2-thienyl or 3-thienyl ring and R.sup.2 represents C 1 to 4 alkyl and optical isomers and racemates thereof and pharmaceutically acceptable salts thereof; together with processes for their preparation, compositions containing them and their use in therapy. The compounds are selective inhibitors of the neuronal isoform of nitric oxide synthase.
摘要:
The present invention relates to a method of allowing users to insert themselves into movie clips, full movies, animations, music videos, commercials, sporting events and other videos. The method and computer apparatus, made up of one or more computer devices interconnected through the internet or network, allows the editing of existing videos by the creation of machine software code instruction templates to automate the editing of those videos, the method of allowing of users to record and edit their takes on those scenes and then insert their takes into the existing video using the automated template instructions that then automate the rendering of the new video composition. The present invention allows for the mass production of the new compositions to be streamed or shared as a custom video. The present invention also allows for the digital rights management of the original video and the newly created video, through the database structure and through metadata tags inserted into the new composite videos with the incorporation of a hierarchical database structure into a communications network of data processing devices so that metadata can be communicated between them.
摘要:
An integrated antenna package includes an interposer, an integrated circuit die, and a cap that forms a cavity within the integrated antenna package. A lossy EBG structure resides at the cap overlying the integrated circuit device. A lossless EBG structure resides at the cap overlying a microstrip feedline. A radar module includes a plurality of receive portions, each receive portion including a parabolic structure having a reflective surface, an absorber structure, a lens, and an antenna.
摘要:
An integrated antenna package includes an interposer, an integrated circuit die, and a cap that forms a cavity within the integrated antenna package. A lossy EBG structure resides at the cap overlying the integrated circuit device. A lossless EBG structure resides at the cap overlying a microstrip feedline. A radar module includes a plurality of receive portions, each receive portion including a parabolic structure having a reflective surface, an absorber structure, a lens, and an antenna.