voice-coil servo

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• Voice coil — A voice coil (consisting of a bobbin, collar and winding) is the coil of wire attached to the apex of the cone of a loudspeaker. It provides the motive force to the cone by the reaction of a magnetic field to the current passing through it. The… …   Wikipedia

• Embedded servo — or wedge servo is a type of servo configuration used on hard disks. Embedded servo systems embed the feedback signals for the read/write head positioner (usually a voice coil motor) inside gaps ( wedges ) in the data tracks of the disk. This… …   Wikipedia

• UNIVAC 1050 — The UNIVAC 1050 was a variable wordlength (1 to 16 characters) decimal and binary computer.Instructions were fixed length (30 bits ndash; 5 characters), consisting of a 5 bit op code , a 3 bit index register specifier, one reserved bit, a 15 bit… …   Wikipedia

• Electric motor — For other kinds of motors, see motor (disambiguation). For a railroad electric engine, see electric locomotive. Various electric motors. A 9 volt PP3 transistor battery is in the center foreground for size comparison. An electric motor converts… …   Wikipedia

• Hard disk drive — Hard drive redirects here. For other uses, see Hard drive (disambiguation). Hard disk drive Mechanical interior of a modern hard disk drive Date invented 24 December 1954 [1] …   Wikipedia

• Subwoofer — A subwoofer is a woofer, or a complete loudspeaker dedicated to the reproduction of bass audio frequencies, from perhaps 150 Hz down as far as 20 Hz, or in rare cases lower. Also known as subs , these are used to augment the low frequency… …   Wikipedia

• Woofer — This article is about a loudspeaker driver. For individuals trained in remote first aid, see Wilderness First Responder. Woofer is the term commonly used for a loudspeaker driver designed to produce low frequency sounds, typically from around 40… …   Wikipedia

• Computer Memories Inc. — Computer Memories Inc. (CMI) was a Chatsworth, California manufacturer of hard disks during the early 1980s. CMI made basic stepper motor based drives, with low cost in mind. In August 1984 they secured a major contract as sole producer of 20… …   Wikipedia

• Powered speakers — the rate of change in audio signals) since cable length is very small in powered speakers. Powered speakers ease set up issues for an audio system, at least to some extent. However since low level signal cables have to be run to the speakers from …   Wikipedia

• Kalok — was a hard disk drive manufacturer which went bankrupt in 1994.One of their last offerings was a 100 megabyte 3.5 disk drive using a stepper motor head actuator (rather than the servo based voice coil operated actuators used on most drives of… …   Wikipedia

• Phonograph — Turntable redirects here. For other uses, see Turntable (disambiguation). Edison cylinder phonograph ca. 1899 …   Wikipedia