User Tools

Site Tools


glossary:glossary_m

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
glossary:glossary_m [2013/04/11 11:46]
WortingUK
glossary:glossary_m [2021/08/11 11:57] (current)
WortingUK [Microprocessor]
Line 14: Line 14:
 ===== Matrix ===== ===== Matrix =====
  
 +[[wp>Diode_matrix|Wikipedea's Matrix entry]]\\ 
 +[[:helpsystem:matrix|Main article]] available to MERG Members only.
  
-[[:helpsystem:matrix|Main article]] +===== 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>Shape-memory_alloy|Wikipedia's entry]]\\  
 +See also TBs[[http://www.merg.org.uk/merg_tbs/download.php?fileid=919&userid=62|G19/01]] 
 +[[https://www.merg.org.uk/merg_tbs/download.php?fileid=920|G19/02]],  
 +[[https://www.merg.org.uk/merg_tbs/download.php?fileid=922|G22/01]],  
 +[[https://www.merg.org.uk/merg_tbs/download.php?fileid=923|G23/01]] &  
 +[[https://www.merg.org.uk/merg_tbs/download.php?fileid=924|G23/02]].\\ 
 ===== Microprocessor ===== ===== Microprocessor =====
  
Line 24: Line 31:
 [[wp>Microprocessor|Microprocessor]] [[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 =====
  
Line 34: Line 45:
  
  
-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) 
 + 
 + 
 +===== 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://www.merg.org.uk/forum/index.php|{{:glossary:moms-link-01.png?nolink|}}]] 
 + 
 +===== 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>MOSFET|MOSFET]].
 + 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.\\
 +//Compapared to a Bipolar transistor, Gate = Base, Source = Emitter, Drain = Collector.//
  
-===== MOSFET ===== 
  
 +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 'ON').
  
-metal-oxide-semiconductor field-effect transistor+===== MSAG =====
  
 +**M**ERG **S**omerset **A**rea **G**roup
  
 ===== Multiplexor ===== ===== Multiplexor =====
glossary/glossary_m.1365680809.txt.gz · Last modified: 2014/11/11 13:27 (external edit)