Differences

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--- glossary:glossary_s [2021/08/08 06:07] – Removed the entry for Surface Mount Components as it appeared to be similar to the SMD entry and SMD is what is usually bandied around the Forum as well as some other tidy up Wayne
+++ glossary:glossary_s [2022/03/06 06:26] (current) – [Schottky Diode] jan_carr
@@ Line 8: / Line 8: @@
 **S**tash **A**cquired **B**eyond **L**ife **E**xpectancy. A stash of "useful things" a hobbyist has acquired and cannot bring themself to throw out in case they might be needed.
+===== Schottky Diode =====
+Named after the German physicist Walter H. Schottky, a Schottky diode is a solid state diode formed by the junction of a semiconductor with a metal. It is used when a low forward voltage drop or high switching speed is required. A conventional solid state silicon diode has a typical forward voltage of 600–700 mV, while a Schottky's forward voltage is 150–450 mV. This lower forward voltage allows higher switching speeds and lower power dissipation.
 ===== SD4 =====
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 The addition of components to a power supply to reduce peaks in the flow of current .
+===== SMPS =====
+A Switched-Mode Power Supply, switching-mode power supply or **SMPS**, is an electronic power supply unit (PSU) that incorporates a switching regulator. While a linear regulator maintains the desired output voltage by dissipating excess power in a "pass" power transistor, the SMPS rapidly switches a power transistor between saturation (full on) and cutoff (completely off) with a variable duty cycle whose average is the desired output voltage.     \\ Advantages include smaller size and lighter weight (from the elimination of low frequency transformers which have a high weight) and lower heat generation from the higher efficiency. Disadvantages include greater complexity, the generation of high amplitude, high frequency energy that the low-pass filter must block to avoid electromagnetic interference and a ripple voltage at the switching frequency and the harmonic frequencies thereof
+===== SoC =====
+[[wp>Sytem_on-a_chip|System on Chip]]
+===== SoD =====
+Start of Day is a term used to denote a process by which the initial state of a system is established.\\
+In [[glossary_c#cbus|CBUS]] this is achieved usually by an input module generating an event which other input modules have been taught to recognize as a SoD. In response these other modules generate a set of events representing the current state of their inputs. See [[cbuscentral:sod|Start Of Day in CBUS]].\\
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+===== SPI =====
+A Serial Peripheral Interface provides a way to connect one or more slave devices to a master device. A little more information of it's use in MERG is at: [[arduino:spi|Arduino Use of SPI and USI]]
 ===== Sprog =====
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 Star Network is a generic term that describes any network that is configured like the rays of light that radiate from a star, that is, there is a centre point and all other points radiate out from the centre.     \\ A Star Network is often recommended for use in the ground system of sensitive equipment, where each separate element is separately connected to the central ground point or 'Star Point', this is done so that individual ground currents do not flow in common wires and thus interfere with each other, probably causing crosstalk which can spoil an HiFi installation with 'Hum' or can cause unreliable operation in a digital system.
-===== SoD =====
-Start of Day is a term used to denote a process by which the initial state of a system is established.\\
-In [[glossary_c#cbus|CBUS]] this is achieved usually by an input module generating an event which other input modules have been taught to recognize as a SoD. In response these other modules generate a set of events representing the current state of their inputs.\\
@@ Line 196: / Line 213: @@
-===== SMPS =====
-A Switched-Mode Power Supply, switching-mode power supply or **SMPS**, is an electronic power supply unit (PSU) that incorporates a switching regulator. While a linear regulator maintains the desired output voltage by dissipating excess power in a "pass" power transistor, the SMPS rapidly switches a power transistor between saturation (full on) and cutoff (completely off) with a variable duty cycle whose average is the desired output voltage.     \\ Advantages include smaller size and lighter weight (from the elimination of low frequency transformers which have a high weight) and lower heat generation from the higher efficiency. Disadvantages include greater complexity, the generation of high amplitude, high frequency energy that the low-pass filter must block to avoid electromagnetic interference and a ripple voltage at the switching frequency and the harmonic frequencies thereof