摘要:
A transmitting and receiving circuit includes a transmitting side amplifier circuit amplifying a transmission signal transmitted from an antenna, a receiving side amplifier circuit amplifying a reception signal received by the antenna and being electrically connected to the a transmitting side amplifier circuit, a first matching circuit matching the antenna and the transmitting side amplifier circuit, a second matching circuit matching the antenna and the receiving side amplifier circuit, a first current source circuit capable of controlling an operating state and setting a first connection point between the first matching circuit and an output terminal of the transmitting side amplifier circuit to a given voltage, and a second current source circuit capable of controlling an operating state and setting a second connection point between the second matching circuit and an input terminal of the receiving side amplifier circuit to a given voltage.
摘要:
An information provider instructs a server system of an information distribution region and attributes of service users, monitors, based upon position information from service users, the state of distribution of service users who have the above-mentioned attributes and are present in the information distribution region designated by the information provider, and distributes prescribed information to mobile information terminals of the service users based upon the state of distribution of the service users.
摘要:
In an information distribution service system comprising a plurality of mobile information terminals, a computer system and a plurality of information-provider terminals, the computer system is provided with a user-information database for registration information categories provided for the mobile information terminals' users each serving as a recipient of an information distribution service rendered by the information distribution service system, an information-provider database for registering locations of the information-provider terminals and information to be distributed by the information-provider terminals as notifications, and a location management unit provided for the purpose of inferring changes in location of each mobile information terminal in a time series by using an inference formula provided in advance for predicting the particular mobile information terminal's moving direction and location on the basis of information on locations of the particular mobile information terminal.
摘要:
The art relates to information distribution service providing technology. The server system predicts the distribution state of mobile information terminals in the future, based on the location information of mobile information terminals and change over time in the distribution state of service users (mobile information terminals) with a specific user characteristic in an information distribution object area. Based on the prediction, the server system carries out information distribution. This makes it possible to improve information distribution efficiency.
摘要:
Using a switching signal from a coarse/fine switching and operation mode switching circuit, the width of change of a counter control value during power up is increased, and the width of change is reduced once a steady state is reached. In the steady state, the frequency of updating is limited by a control signal from an update permit control circuit. In the steady state, the frequency band of a current source in an LD driving circuit is reduced in width.
摘要:
When a service requested by a user is provided by communication, a mapping unit uses a prescribed function to map (convert) information that has been entered the auser in order that the user may receive provision of service, or information that has been gathered or acquired in the course of execution of a call connection or communication service. A service generating unit, which generates a service for the user, generates added value (e.g., content) based upon the result of mapping, applies this added value to the service requested by the user and provides the service to the user. Alternatively, on the basis of a converted value obtained, a modification is applied to a service provided by an information provider or to the specifics of the service, and the modified service is supplied to the user.
摘要:
There is provided a semiconductor device structured so as to be mounted jointly with other devices on one chip, and capable of controlling a large current in spite of a small device area while having small on-resistance, thereby enabling a high voltage resistance to be obtained. In the case of NLDMOS, the semiconductor device comprises an N well layer, formed on a p-type semiconductor substrate, a P well layer formed in the N well layer, a source electrode formed in a source trench cavity within the P well layer, a gate electrode formed in at least one of gate trench cavities within the P well layer, through the intermediary of an oxide film, and a drain electrode formed in a drain trench cavity within the N well layer, and further, N+ diffused layers are formed around the source trench cavity, the drain trench cavity, respectively.
摘要:
At a portion below a gate electrode of a vertical type MOS transistor having a gate electrode and source electrodes formed over the surface of a semiconductor substrate and a drain electrode formed over the back thereof, a P type impurity diffusion layer spaced away from P well diffusion layers which surround sources, is formed in the semiconductor substrate which serves as a drain region.
摘要:
A communication network system including: a first node apparatus; a second and third node apparatuses; and a fourth node apparatus which performs radio communication with the first node apparatus via the second node apparatus or the third node apparatus, wherein the first node apparatus includes a control unit which determines a route selection rule for a first route reaching the fourth node apparatus via the second node apparatus and a second route reaching the fourth node apparatus via the third node apparatus, based on an adaptability indicating a reference of the route selection to route selection indicators indicating a state of the first and second routes respectively, and selects the first route or the second route according to the determined route selection rule, and the first and fourth node apparatuses perform the radio communication via the second node apparatus or the third node apparatus.
摘要:
A filter circuit includes a low-pass filter and a calibration circuit calibrating a frequency characteristic of the low-pass filter. The calibration circuit includes a negative feedback circuit and a control circuit.