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direct-communication amplifier

См. также в других словарях:

  • Electronic amplifier — A practical amplifier circuit An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In… …   Wikipedia

  • Valve amplifier — A valve amplifier or tube amplifier is a type of electronic amplifier that make use of vacuum tubes instead of solid state semiconductor devices (such as transistors). As any other electronic amplifier they serve to increase the power and/or… …   Wikipedia

  • Optical amplifier — An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from… …   Wikipedia

  • satellite communication — Introduction  in telecommunication, the use of artificial satellites to provide communications links between various points on Earth (Earth satellite). Communications satellites relay voice, video, and data signals between widely separated fixed… …   Universalium

  • Fiber-optic communication — An optical fiber junction box. The yellow cables are single mode fibers; the orange and blue cables are multi mode fibers: 50/125 µm OM2 and 50/125 µm OM3 fibers respectively. Fiber optic communication is a method of transmitting information from …   Wikipedia

  • Augmentative and alternative communication — An AAC user indicates a series of numbers on an eye gaze communication board in order to convey a word. Augmentative an …   Wikipedia

  • Valve RF amplifier — A valve RF amplifier (UK and Aus.) or tube amplifier (U.S.), is a device for electrically amplifying the power of an electrical , typically (but not exclusively) radio frequency signals.Low to medium power valve amplifiers for frequencies below… …   Wikipedia

  • Magnetic amplifier — The magnetic amplifier (colloquially known as a mag amp ) is an electromagnetic device for amplifying electrical signals. The magnetic amplifier was invented early in the 20th century, and was used as an alternative to vacuum tube amplifiers… …   Wikipedia

  • Hearing impairment — See also: Deaf culture for the social movement.. Deaf and/or hard of hearing Classification and external resources The International Symbol for Deafness …   Wikipedia

  • Ernst Alexanderson — Infobox Scientist name = Ernst Frederick Werner Alexanderso caption = birth date = birth date|1878|1|25 birth place = Uppsala, Sweden death date = death date and age|1975|5|14|1878|1|25 death place = residence = United States nationality =… …   Wikipedia

  • Boston — /baw steuhn, bos teuhn/, n. 1. a seaport in and the capital of Massachusetts, in the E part. 562,994. 2. (l.c.) a variety of whist, popular in the early 19th century, played by four persons with two packs of cards. 3. (usually l.c.) a social… …   Universalium

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