glossary:glossary_m
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| glossary:glossary_m [2013/04/07 15:06] – [Magnet] Bob Vetterlein | glossary:glossary_m [2021/08/11 11:57] (current) – [Microprocessor] WortingUK | ||
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| - | ======= Glossary M ======= | + | ====== Glossary M ====== |
| - | ~~NOTOC~~ | + | |
| - | [[start|Return to main Glossary index]] | + | |
| + | [[:glossary:start|Return to main Glossary index]] | ||
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| - | A magnet is an object that has a magnetic field. It can be in the form of a permanent magnet or an electromagnet. | + | A magnet is an object that has a magnetic field. It can be in the form of a permanent magnet or an electromagnet.\\ |
| + | [[wp>Magnet|Magnet]] | ||
| ===== Matrix ===== | ===== Matrix ===== | ||
| - | [[: | + | [[wp> |
| + | [[: | ||
| + | ===== Memory Wire ===== | ||
| + | Wire made from a special alloy which changes its molecular structure at a certain temperature causing it to shrink. This effect can usefully be applied to point and signal actuation. Some types require a tension spring to pull it back to its original length while others will return unaided, although a spring is still required to keep the wire tight, it can only pull when shrinking, it cannot push.\\ | ||
| + | [[wp> | ||
| + | See also TBs: [[http:// | ||
| + | [[https:// | ||
| + | [[https:// | ||
| + | [[https:// | ||
| + | [[https:// | ||
| ===== Microprocessor ===== | ===== Microprocessor ===== | ||
| - | A microprocessor (sometimes abbreviated µP) is a programmable digital electronic component that incorporates the functions of a central processing unit (CPU) on a single semiconducting integrated circuit (IC). | + | A microprocessor (sometimes abbreviated µP) is a programmable digital electronic component that incorporates the functions of a central processing unit (CPU) on a single semiconducting integrated circuit (IC).\\ |
| + | [[wp>Microprocessor|Microprocessor]] | ||
| + | microprocessor is a general-purpose name. Specialised devices:\\ | ||
| + | A digital signal processor (DSP) is specialized for signal processing.\\ | ||
| + | Graphics processing units (GPU) for rendering of images.\\ | ||
| + | Microcontrollers integrate a microprocessor with peripheral devices in embedded systems..\\ | ||
| + | System On Chip (SoC) often integrate one or more microprocessor cores with bus controllers. | ||
| ===== Mobile decoder ===== | ===== Mobile decoder ===== | ||
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| - | Is the process of superimposing information onto a pure sine wave (Carrier wave), this process can be achieved by any of fourmethods, amplitude (AM), frequency (FM), Phase (PM) or Pulse (PAM, PWM, or PPM) | + | Is the process of superimposing information onto a pure sine wave (Carrier wave), this process can be achieved by any of four methods, amplitude (AM), frequency (FM), Phase (PM) or Pulse (PAM, PWM, or PPM) |
| - | ===== Multiplexor ===== | + | ===== MOMS ==== |
| + | MERG Online Membership System - MERG's membership management system - used by Members to manage their contact details and renew membership and by the Membership Secretary for administration purposes. Available via the MERG Forum [[https:// | ||
| + | |||
| + | ===== Monostable ===== | ||
| + | An electronic circuit that has a single (mono) stable state and an unstable state, an input will cause the circuit to assume the unstable state, when the input signal is removed and after a predictable delay the circuit will return to the stable state. This behaviour is the basis of most timer circuits. | ||
| + | ===== MOSFET Metal-Oxide-Semiconductor Field-Effect Transistor ===== | ||
| + | |||
| + | A MOSFET is a type of transistor with a Gate, Source and Drain terminals. [[wp> | ||
| + | They are the dominant type of transistor in electronics.\\ | ||
| + | The resistance between Source and Drain (D-S) is controlled by the Voltage applied across the Gate and Source. | ||
| + | A Voltage across D-S causes a current to flow in the D-S resistance. There are several sub-types...\\ | ||
| + | - N channel uses positive Voltages or P channel uses negative Voltages \\ | ||
| + | - Depletion mode uses increasing Gate Voltage to increase D-S resistance or Enhancement mode uses decreasing Gate Voltage to decrease D-S resistance\\ | ||
| + | For MERG, the common type is N channel Enhancement mode.\\ | ||
| + | // | ||
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| + | The Gate exhibits a very high resistance (insulation) to the Source or Drain.\\ | ||
| + | There being an insulation, the Gate has capacitance to the other pins and needs to be driven by a low impedance (AC resistance) input signal. A high impedance input signal will make the device slow. An open circuit Gate can build up a charge and results in the D-S going low resistance (turns ' | ||
| + | |||
| + | ===== MSAG ===== | ||
| + | |||
| + | **M**ERG **S**omerset **A**rea **G**roup | ||
| + | |||
| + | ===== Multiplexor ===== | ||
| - | A communications device that multiplexes (combines) several signals for transmission over a single medium. A demultiplexor completes the process by separating multiplexed signals from a transmission line. Frequently a multiplexor and demultiplexor are combined into a single device capable of processing both outgoing and incoming signals. | ||
| + | A communications device that multiplexes (combines) several signals for transmission over a single medium. A demultiplexor completes the process by separating multiplexed signals from a transmission line. Frequently a multiplexor and demultiplexor are combined into a single device capable of processing both outgoing and incoming signals.\\ | ||
| + | A multiplexor is sometimes called a mux and also spelled as multiplexer.\\ | ||
| + | [[http:// | ||
glossary/glossary_m.1365347181.txt.gz · Last modified: 2014/11/11 13:27 (external edit)