87 results about "Basic power supply" patented technology

The present invention discloses a power supply wiring method for stabilizing operation of a semiconductor integrated circuit device. A power supply mesh 24, which is arranged on an upper layer of a basic power supply wires 18 for supplying power to a logic circuit portion 13, includes vertical reinforcing power supply wires 22 and lateral reinforcing power supply wires 23. The widths of the vertical reinforcing power supply wires and lateral reinforcing power supply wires are optimized to mitigate IR drop or excessive current density in each division unit u0.

A power factor correction circuit (42 / 44) responsive to an input power supply signal at an input supply voltage (VAC) that varies largely sinusoidally with time at a fundamental supply frequency contains regulator / control circuitry (60, 62, and 64) for measuring and removing overtones (ILDm or IFWRm) in the input supply current (ILD) or in a rectified form (IFWR) of the input supply current. Each overtone is expressible as the product of an amplitude component (Im) and a sinusoidal function (Im sin [(m+1)ωACt]) that varies with time at an integer multiple of the fundamental supply frequency. The regulator / control circuitry measures an overtone by determining the overtone's amplitude component. After generating an adjustment factor (SADJ) largely as the product of that overtone's amplitude component and an associated sinusoidal function, the regulator / control circuitry adjusts the input supply current or its rectified form by an amount corresponding to the adjustment factor for each measured overtone.

The invention relates to an inland shore-based AIS (Automatic Identification System) ship data wireless transmission device and a transmission method. The device comprises a communication antenna, a solar cell panel, a storage cell, a GPRS communication module, an AIS data filtering module, an AIS shore-based receiver, a protection box and a support rod. The communication antenna, the solar cell panel and the protection box are fixed on the support rod. The storage cell, the GPRS communication module, the AIS data filtering module and the AIS shore-based receiver are fixed in the protection box. The connection is that the storage battery is unidirectionally connected with the GPRS communication module, the AIS data filtering module and the AIS shore-based receiver. The AIS data filtering module is bidirectionally connected with the GPRS communication module and the AIS shore-based receiver. The GPRS communication module is connected with the communication antenna through a radio frequency cable. The solar cell panel is connected with the storage cell. The technical effects are that redundant AIS message information can be filtered, the wireless transmission efficiency is improved, the public network transmission costs are reduced, and the device and the method are especially applicable to remote inland waterway regions in which AIS standard base stations cannot be applied due to the fact that there is no infrastructure such as a basic power supply and the internet.

A switching power supply has electronic parts that configure a switching circuit. The electronic parts are accommodated in a casing. A seat member is formed unitarily with the casing on which the electronic parts are mounted. A coolant channel is formed through the seat member so as to be open at least at two positions of an outer wall surface of the casing. Coolant that flows through the coolant channel cools the electronic parts mounted on the seat member.

The switching element is turned ON and OFF according to when the current flowing through the inductance element becomes equal to zero and according to an amplified error voltage between the output voltage and a target output voltage. More particularly, the OFF time of the switching element is calculated, and when the OFF time is less than a prescribed value, the ON time of the switching element is increased. Moreover, the amount by which the ON time of the switching element is increased is reduced if the error voltage if greater than a prescribed value.

A multi-layered printed wiring board, capable of securing required wiring density even with a decreased number of wiring layers and reducing radiation noises, has at least three wiring layers each at least having at least one power supply line or a ground line, and another kind of line, the wiring layers each having an outer edge. A ground line is formed at the outer edge of at least one of the wiring layers. A basic power supply line is formed inside the ground line. At least one power supply line extends from the basic power supply line. A plurality of electronic parts are mounted on at least one of the wiring layers. The at least one power supply line is wired to mounting positions of the electronic parts via at least one of the wiring layers.