摘要:
Fabricating a vertical-channel junction field-effect transistor includes forming an unintentionally doped GaN layer on a bulk GaN layer by metalorganic chemical vapor deposition, forming a Cr/SiO2 hard mask on the unintentionally doped GaN layer, patterning a fin by electron beam lithography, defining the Cr and SiO2 hard masks by reactive ion etching, improving a regrowth surface with inductively coupled plasma etching, removing hard mask residuals, regrowing a p-GaN layer, selectively etching the p-GaN layer, forming gate electrodes by electron beam evaporation, and forming source and drain electrodes by electron beam evaporation. The resulting vertical-channel junction field-effect transistor includes a doped GaN layer, an unintentionally doped GaN layer on the doped GaN layer, and a p-GaN regrowth layer on the unintentionally doped GaN layer. Portions of the p-GaN regrowth layer are separated by a vertical channel of the unintentionally doped GaN layer.
摘要:
A buck converter includes an input terminal, two MOSFETs, a PWM module and a control module. The input terminal is coupled to a power source to provide power to the buck converter. The PWM module is coupled to the gates of the two MOSFETs to alternately turn on and turn off the two MOSFETs. The control module is configured to shut down the power source if a drain-source resistance or a gate-source resistance in either one of the two MOSFETs is not within normal values when the two MOSFETs are turned off.
摘要:
A power supply, an over voltage protection (OVP) apparatus, and an OVP method are provided. The present invention employs the OVP apparatus for monitoring a core power. When a voltage level of the core power is higher than a reference voltage, the OVP apparatus disables a power supply unit. As such, the present invention is adapted for avoiding damage to a capacitor of a conversion unit or load caused by abnormal boost of the voltage level of the core power.
摘要:
A bearing assembly of a blender consists of a bearing holder (1) having an axial hole (11) and a cavity (12) which connected with said axial hole (11), a shaft (3), a bearing cap (4) provided inside said cavity (12), and two bearings (5a, 5b) provided in said bearing cap (4). Said cavity (12) comprises a first compartment (13) for receiving said bearing cap (4) and a second compartment (14) for receiving a first and a second ring seal (6a, 6b) which are made of Teflon.
摘要:
A testing system utilizing a common power supply and a display device to test different types of a main board circuit is disclosed. The testing system includes a power supply device for outputting a predetermined power; a liquid crystal display for receiving a control signal from the main board circuit to perform a testing procedure; and an adapter. The adapter includes a first circuit coupled electrically between the power supply device and the main board circuit for converting the predetermined power into a power needed by the main board circuit, and a second circuit coupled electrically between the main board circuit and the liquid crystal display for converting a control signal generated by the main board circuit into a signal format required to perform the testing procedure on the liquid crystal display.
摘要:
Through a low-dose irradiation, a seaweed's growth becomes fast and its production is improved as well. By doing so, a material for biomass energy is provided.
摘要:
A wild seaweed, like sea lettuce, is picked and germ cells are released from the seaweed. The germ cells then obtain adherence and are sprouted into youngs of the seaweed so that the seaweed can be cultivated artificially and productively and can be supplied as a material for biomass energy.
摘要:
An active clamping circuit. The active clamping circuit is applicable to a DC-to-DC conversion circuit, and has an output terminal to supply an output voltage to a load. In the active clamping circuit, a determining circuit is coupled to the DC-to-DC conversion circuit to determine the output detects the output voltage and to output a first enable signal when the output voltage is higher than a first predetermined voltage. A voltage adjustment circuit is coupled to the determining circuit to pull low the output voltage according to the first enable signal. An inductor has a first end coupled to the output terminal of the DC-to-DC conversion circuit, and a diode is coupled between the inductor and an input terminal of the DC-to-DC conversion circuit as a conductive path to channel discharge current to the input terminal of the DC-to-DC conversion circuit.
摘要:
A language input architecture converts input strings of phonetic text to an output string of language text. The language input architecture has a search engine, one or more typing models, a language model, and one or more lexicons for different languages. The typing model is configured to generate a list of probable typing candidates that may be substituted for the input string based on probabilities of how likely each of the candidate strings was incorrectly entered as the input string. The language model provides probable conversion strings for each of the typing candidates based on probabilities of how likely a probable conversion output string represents the candidate string. The search engine combines the probabilities of the typing and language models to find the most probable conversion string that represents a converted form of the input string.
摘要:
A search engine architecture is designed to handle a full range of user queries, from complex sentence-based queries to simple keyword searches. The search engine architecture includes a natural language parser that parses a user query and extracts syntactic and semantic information. The parser is robust in the sense that it not only returns fully-parsed results (e.g., a parse tree), but is also capable of returning partially-parsed fragments in those cases where more accurate or descriptive information in the user query is unavailable. A question matcher is employed to match the fully-parsed output and the partially-parsed fragments to a set of frequently asked questions (FAQs) stored in a database. The question matcher then correlates the questions with a group of possible answers arranged in standard templates that represent possible solutions to the user query. The search engine architecture also has a keyword searcher to locate other possible answers by searching on any keywords returned from the parser. The answers returned from the question matcher and the keyword searcher are presented to the user for confirmation as to which answer best represents the user's intentions when entering the initial search query. The search engine architecture logs the queries, the answers returned to the user, and the user's confirmation feedback in a log database. The search engine has a log analyzer to evaluate the log database to glean information that improves performance of the search engine over time by training the parser and the question matcher.