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In electronics, a common-drain amplifier, also known as a source follower, is one of three basic single-stage field-effect transistor (FET) amplifier topologies, typically used as a voltage buffer. In this circuit (NMOS) the gate terminal of the transistor serves as the signal input, the source is the output, and the drain is common to both (input and output), hence its name. Because of its low dependence on the load resistor on the voltage gain, it can be used to drive low resistance loads, such as a speaker. The analogous bipolar junction transistor circuit is the common-collector amplifier. This circuit is also commonly called a "stabilizer".
In addition, this circuit is used to transform impedances. For example, the Thévenin resistance of a combination of a voltage follower driven by a voltage source with high Thévenin resistance is reduced to only the output resistance of the voltage follower (a small resistance). That resistance reduction makes the combination a more ideal voltage source. Conversely, a voltage follower inserted between a driving stage and a high load (i.e. a low resistance) presents an infinite resistance (low load) to the driving stage—an advantage in coupling a voltage signal to a large load.
In electronics, a common-drain amplifier, also known as a source follower, is one of three basic single-stage field-effect transistor (FET) amplifier topologies...
is common to both input and output. The source is common to both input and output. The drain is common to both input and output. It is also known as a "source...
hence its name. The analogous field-effect transistor circuit is the commondrain amplifier and the analogous tube circuit is the cathode follower. The...
is common source, commondrain, or common gate is to examine where the signal enters and leaves. The remaining terminal is what is known as "common". In...
October 26, 1920. Note that the basic schematic shown below labeled "Common-drain Hartley circuit" is essentially the same as in the patent drawing, except...
output voltage follows the input voltage); the field effect transistor in common-drain configuration (called a source follower because the source voltage follows...
the material causing the clog. The history of drain cleaners parallels the development of commondrain systems themselves. As a result, there is not an...
is positive with respect to the source). Because a JFET in a common source or commondrain configuration has a large input impedance (sometimes on the...
application of the common-emitter amplifier is presented in. Electronics portal Common base Common collector Common gate CommondrainCommon source Open collector...
building to the collector sewer mains. The history of drain cleaners parallels the development of commondrain systems themselves. As a result, there is not an...
serves as the input, the drain is the output, and the gate is connected to some DC biasing voltage (i.e. an AC ground), or "common," hence its name. The...
can realize common base, common collector or common emitter amplification; a MOSFET can realize common gate, common source or commondrain amplification...
trenches with perforated pipes at the bottom, are the most common type of subsurface drain. Trench drains, which are similar but shallower and wider, are also...
Open collector, open drain, open emitter, and open source refer to integrated circuit (IC) output pin configurations that process the IC's internal function...
amplifier in the output port. Electronics portal Common collector Common emitter Common gate CommondrainCommon source Differential amplifier Hybrid-pi model...
A storm drain, storm sewer (United Kingdom, U.S. and Canada), surface water drain/sewer (United Kingdom), or stormwater drain (Australia and New Zealand)...
Psychodidae, also called drain flies, sink flies, filter flies, sewer flies, or sewer gnats, is a family of true flies. Some genera have short, hairy...
Biliary drainage is performed with a tube or catheter (called a biliary drain, biliary stent or biliary catheter) by a surgeon or, commonly, an interventional...
A Penrose drain is a soft, flexible rubber tube used as a surgical drain, to prevent the buildup of fluid in a surgical site. It belongs to the "passive"...
the bifurcation of the aorta, in front of the fifth lumbar vertebra. They drain chiefly the hypogastric and external iliac glands, and their efferents pass...
"Drain You" is a song by American rock band Nirvana, written by vocalist and guitarist, Kurt Cobain. It is the eighth track on their second album, Nevermind...
A chest tube (also chest drain, thoracic catheter, tube thoracostomy or intercostal drain) is a surgical drain that is inserted through the chest wall...
An external ventricular drain (EVD), also known as a ventriculostomy or extraventricular drain, is a device used in neurosurgery to treat hydrocephalus...
a plumbing system to deliver and drain water. The most common plumbing fixtures are: Bathtubs Bidets Channel drains Drinking fountains Showers Sinks Tap...
and to drain damp grassland and increase the use of pesticides, both of which could have reduced the availability of invertebrate food. The common blackbird...
consistently drain from basins in a clockwise/counter-clockwise direction depending on the hemisphere. The common myth often refers to the draining action of...
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