Philips

About: Philips is a company organization based out in Vantaa, Finland. It is known for research contribution in the topics: Signal & Layer (electronics). The organization has 68260 authors who have published 99663 publications receiving 1882329 citations. The organization is also known as: Koninklijke Philips Electronics N.V. & Royal Philips Electronics.

Interface for a TV-VCR system

Abstract: A system for integrating the operation and control of a television receiver and a video cassette recorder (vcr), the television receiver being capable of receiving and displaying various television channels as well as other video signals, and the vcr being capable of recording programs at least from the broadcast channels and reproducing programs previously recorded on tapes and outputting the programs as video signals, the system having a device for enabling a user to control the system and thereby operate the television receiver and/or the vcr, and to enter information concerning the user's favorite broadcast programs and various particular broadcast programs into the system, the information including the program name, broadcast channel, starting time, length, repeat pattern in the case of favorite broadcast programs, and whether the user wants the program recorded; a first store for storing the favorite broadcast program information and the various particular broadcast program informantion; a second store for storing information concerning programs on a tape currently loaded in the vcr; a third store for storing information concerning programs on other tapes of the user; a devicd coupled to the vcr for controlling the recording and reproducing functions thereof in response to the information stored in the first and second stores and the enabling device; an output device coupled to the first, second and third stores for selectively providing to the television receiver an output of the system including the favorite broadcast program information, the program information of the current tape, and the program information of the other tapes; and a device coupled to the television receiver for selectively switching an input of the television receiver between the broadcast channels, the vcr output and the system output.

Improving the linearity of piezoelectric ceramic actuators

Abstract: It is shown that the linearity of a piezoelectric ceramic actuator may be greatly improved if the applied electric charge, rather than the applied voltage, is varied to control the extension. Hysteresis is virtually eliminated.

IEEE 802.11s: The WLAN Mesh Standard

Abstract: The wireless local area network standard IEEE 802.11 is the preferred solution for lowcost data services. Key to its success are the 2.4 and 5 GHz unlicensed bands. The transmit power limitations imposed due to regulatory requirements limit the range (coverage) that can be achieved by WLANs in these bands. However, the demand for "larger" wireless infrastructure is emerging, ranging from office/university campuses to city-wide deployments. To overcome the limitations of singlehop communication, data packets need to traverse over multiple wireless hops, and wireless mesh networks are called for. Since 2004 Task Group S has been developing an amendment to the 802.11 standard to exactly address the aforementioned need for multihop communication. Besides introducing wireless frame forwarding and routing capabilities at the MAC layer, the 802.11s amendment brings new interworking and security. In this article, we provide insights into the latest developments in 802.11s and explain how the overall mesh concept fits into the 802 set of networking standards.

Inductive power system and method of operation

Abstract: An inductive power pad (100) includes a plurality of transmitting inductors (120) and a respective plurality of detector circuits (140). Each transmitting inductor (120) is operable to provide inductive energy to a power receiver circuit (150). Each detector circuit (140) corresponds to one of the plurality of transmitting inductors (120) and each detector circuit (140) is operable to electromagnetically sense a power receiver circuit (150) in proximity thereto. Each detector circuit upon electromagnetically sensing a power receiver circuit, is further operable to control switching of its corresponding transmitting inductor to a power supply (130), thereby providing a supply voltage to said corresponding transmitting inductor, said supply voltage operable to generating inductive energy (110) for transmission to said power receiver circuit.