Panasonic

About: Panasonic is a company organization based out in Kadoma, Ôsaka, Japan. It is known for research contribution in the topics: Signal & Layer (electronics). The organization has 49129 authors who have published 71118 publications receiving 942756 citations. The organization is also known as: Panasonikku Kabushiki-gaisha & Panasonic.

Power supply processing for power amplifiers

Abstract: The present invention, generally speaking, uses multiple selectable power supply paths, a saturation detector, or combinations of the same to achieve efficient power supply processing. In one aspect of the invention, a power supply processing circuit includes a first switched converter stage and a second linear stage. Depending on the power supply desired, the first stage may be bypassed to avoid conversion losses. In another aspect of the invention, a saturation detector is used to control the first stage such that the second stage operates efficiently just short of saturation, thereby avoiding distortion.

CDMA/TDD Radio Communication System

Abstract: In addition to a structure of a conventional CDMA/TDD radio communication system, a base station includes a pilot signal generating circuit for generating a pilot signal that has a constant transmission power level and is known in mobile units and a pilot channel spreading circuit for transmitting the pilot signal to the mobile units through a transmission line. Each of the mobile units includes a pilot signal reception level measuring circuit for measuring reception power of the received pilot signal and a transmission power control circuit for controlling transmission power of a power amplification circuit based on the measured reception power of the received pilot signal.

Gateway apparatus for controlling apparatuses on home network

Abstract: The gateway apparatus has an IP address table that relates a plurality of apparatuses, each of which is one of components constructing a home network, to IP addresses respectively assigned to the apparatuses to store, a reception section that receives data with a destination indicative of one of the apparatuses constructing the home network, a recognition section that recognizes the apparatus with an IP address matching the IP address indicative of the destination contained in received data using the IP address table, and a distribution section that transmits the received data to the recognized apparatus.

Nitride based LED with a p-type injection region

Abstract: An LED chip (2) is composed of a p-GaN layer (10), an n-GaN layer (14), and an MQW emission layer (12) that is sandwiched between the GaN layers (10 and 14). Each layer is made of a GaN semiconductor. Light exits the LED chip (2) through the n-GaN layer (14). A p-electrode (16) of the LED chip (2) has a surface profile (24B) defined by a plurality of columnar projections (24A) formed in a uniformly distributed relation on the surface facing toward the p-GaN layer (10). The p-electrode (16) is in contact with the p-GaN layer (10) at the top surface of each projection (24A).

Writing method of variable resistance non-volatile memory element and variable resistance non-volatile memory device

Abstract: A writing method of a variable resistance non-volatile memory element comprises determining, in a first determination step, whether or not a resistance state of the variable resistance non-volatile memory element does not switch to a first resistance state and remains in a second resistance state, when a pulse of a second voltage is applied to the variable resistance non-volatile memory element; and when it is determined that the resistance state of the variable resistance non-volatile memory element does not switch to the first resistance state and remains in the second resistance state in the first determination step, applying, in a recovery step, at least once to the variable-resistance non-volatile memory element a recovery voltage pulse set composed of two pulses which are a first recovery voltage pulse which has the same polarity as that of the first voltage and a second recovery voltage pulse which has the same polarity as that of the second voltage, has a greater amplitude than the second voltage, and is applied subsequently to the first recovery voltage pulse.