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Class D (other)
The term Class D may refer to: * Class D (baseball), a defunct class in minor league baseball in North America * Class-D amplifier or switching amplifier * Class D fire extinguisher * Class D league, a classification of minor league baseball from 1902 to 1962 * Class D star, a stellar classification * Class D, IP addresses on a classful network * Class D, an airspace class as defined by the ICAO * Class D, a type of Driver's license in the United States * Class D, a North American broadcast station class * Class-D, a type of character in the video game '' SCP – Containment Breach'' See also * D class (other) * D (other) * * Delta class (other) {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class D (baseball)
Minor League Baseball (MiLB) is a professional baseball organization below Major League Baseball (MLB), constituted of teams affiliated with MLB clubs. It was founded on September 5, 1901, in response to the growing dominance of the National League (baseball), National League and American League, as the National Association of Professional Baseball Leagues (NAPBL or NA). Minor League Baseball originated as simply the organization of lower tiers of professional baseball in the United States, comprising clubs that lacked the financial means to compete with the National League and later the American League. The association of minor leagues remained independent throughout the early 20th century, protected by agreements with the major leagues to ensure they were compensated when minor-league players were signed by major-league clubs. Later, Minor League Baseball evolved to be constituted entirely of farm team, affiliates of larger clubs, giving young prospects a chance to develop the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class-D Amplifier
A class-D amplifier, or switching amplifier, is an electronic amplifier in which the amplifying devices (transistors, usually MOSFETs) operate as electronic switches, and not as linear gain devices as in other amplifiers. They operate by rapidly switching back and forth between the supply rails, using pulse-width modulation, pulse-density modulation, or related techniques to produce a pulse train output. A simple low-pass filter may be used to attenuate their high-frequency content to provide analog output current and voltage. Little energy is dissipated in the amplifying transistors because they are always either fully on or fully off, so efficiency can exceed 90%. History The first class-D amplifier was invented by British scientist Alec Reeves in the 1950s and was first called by that name in 1955. The first commercial product was a kit module called the X-10 released by Sinclair Radionics in 1964. However, it had an output power of only 2.5 watts. The Sinclair X-20 in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class D Fire Extinguisher
A fire extinguisher is a handheld active fire protection device usually filled with a dry or wet chemical used to extinguish or control small fires, often in emergencies. It is not intended for use on an out-of-control fire, such as one which has reached the ceiling, endangers the user (i.e., no escape route, smoke, explosion hazard, etc.), or otherwise requires the equipment, personnel, resources or expertise of a fire brigade. Typically, a fire extinguisher consists of a hand-held cylindrical pressure vessel containing an #Types of extinguishing agents, agent that can be discharged to extinguish a fire. Fire extinguishers manufactured with non-cylindrical pressure vessels also exist, but are less common. There are two main types of fire extinguishers: stored-pressure and cartridge-operated. In stored-pressure units, the expellant is stored in the same chamber as the firefighting agent itself. Depending on the agent used, different propellants are used. With dry chemical extingu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
