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In electronics, a common-source amplifier is one of three basic single-stage field-effect transistor (FET) amplifier topologies, typically used as a voltage or transconductance amplifier. The easiest way to tell if a FET is common source, common drain, or common gate is to examine where the signal enters and leaves. The remaining terminal is what is known as "common". In this example, the signal enters the gate, and exits the drain. The only terminal remaining is the source. This is a common-source FET circuit. The analogous bipolar junction transistor circuit may be viewed as a transconductance amplifier or as a voltage amplifier. (See classification of amplifiers). As a transconductance amplifier, the input voltage is seen as modulating the current going to the load. As a voltage amplifier, input voltage modulates the current flowing through the FET, changing the voltage across the output resistance according to Ohm's law. However, the FET device's output resistance typically is not high enough for a reasonable transconductance amplifier (ideally infinite), nor low enough for a decent voltage amplifier (ideally zero). As seen below in the formula, the voltage gain depends on the load resistance, so it cannot be applied to drive low-resistance devices, such as a speaker (having a resistance of 8 ohms). Another major drawback is the amplifier's limited high-frequency response. Therefore, in practice the output often is routed through either a voltage follower (common-drain or CD stage), or a current follower (common-gate or CG stage), to obtain more favorable output and frequency characteristics. The CS–CG combination is called a cascode amplifier.
is commonsource, common drain, or common gate is to examine where the signal enters and leaves. The remaining terminal is what is known as "common". In...
Commonsource bias is a type of sampling bias, occurring when both dependent and independent variables are collected from the same group of people. This...
sayings gospel, and the Q source, a hypothetical sayings gospel, have a commonsource. Elements of this Common Sayings Source can be found in the text...
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...
The Shared SourceCommon Language Infrastructure (SSCLI), previously codenamed Rotor, is Microsoft's shared source implementation of the CLI, the core...
analogous FET circuit is the common-source amplifier, and the analogous tube circuit is the common-cathode amplifier. Common-emitter amplifiers give the amplifier...
current source widely used in integrated circuits. The common base, common gate and common grid configurations can serve as constant current sources as well...
upon a second commonsource, termed Q. Herbert Marsh is seen by some as the first person to hypothesize the existence of a "narrative" source and a "sayings"...
the equation: r out ≈ R source β 0 . {\displaystyle r_{\text{out}}\approx {\frac {R_{\text{source}}}{\beta _{0}}}.} The common collector amplifier's low...
configuration is used less often than the commonsource or source follower. However, it can be combined with commonsource amplifiers to create cascode configurations...
A CommonSource Data Base (CSDB) is to provide the user (mainly technical authors, illustrators and publication managers) with automated processes to...
of their decay. Commonsource radionuclides include cobalt-60, iridium-192, and strontium-90. The SI measurement quantity of source activity is the Becquerel...
transistor can realize common base, common collector or common emitter amplification; a MOSFET can realize common gate, commonsource or common drain amplification...
common-base amplifier Rin. The consequence is that the source delivers a current to the input rather than a voltage, even if it is a voltage source....
North America. It is a commonsource of psyllium, a type of dietary fiber. Psyllium seed husks are indigestible and are a source of soluble fiber which...
flu or the 2009 swine flu. In a commonsource outbreak epidemic, the affected individuals had an exposure to a common agent. If the exposure is singular...
neither Gospel drew upon the other, but upon a second commonsource, termed the Q. This two-source hypothesis speculates that Matthew borrowed from both...
written decisions and precedent as a source of law (one of the defining features of common law legal systems). While Common law systems place great weight on...
gate is positive with respect to the source). Because a JFET in a commonsource or common drain configuration has a large input impedance (sometimes on the...
typically have several features built in, including a source-code editor that can alert the programmer to common errors. Modification often includes code refactoring...
Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code...
begin fermenting, or wheat bran steeped in wine, as a source for yeast. The most commonsource of leavening was to retain a piece of dough from the previous...
consists of a common emitter stage feeding into a common base stage when using bipolar junction transistors (BJTs) or alternatively a commonsource stage feeding...
with the database need. The purpose of preparing it is to create a commonsource to be used by all players within the scene. The potential users are:...
radioactive source, using semiconductor junctions. A commonsource used is the hydrogen isotope tritium. Unlike most nuclear power sources which use nuclear...
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