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I have come across a 5-band resistor with the following color code: red-violet-gold-gold-yellow. The value of this resistor is marked 2.7 ohms in my schematic. I understand if there is a gold 4th band in a 5-band resistor, but a 3rd and 4th gold band? It is an older resisor, so the yellow 5th band is likely a TempCo of 25 ppm.
Doping of a pure silicon array. Silicon based intrinsic semiconductor becomes extrinsic when impurities such as Boron and Antimony are introduced.. In semiconductor production, doping is the intentional introduction of impurities into an intrinsic (undoped) semiconductor for the purpose of modulating its electrical, optical and structural properties.
It is used as substitute for a conventional ohmic load resistor. Electronic loads with 800W and 4200W from Höcherl & Hackl. As counterpart to a current source, the electronic load is a current sink. When loading a current source with a fixed resistor one can set one determined load current by the connected load resistor.
In contrast, wire-wound resistors have the least amount of flicker noise. Since flicker noise is related to the level of DC, if the current is kept low, thermal noise will be the predominant effect in the resistor, and the type of resistor used may not affect noise levels, depending on the frequency window.
Gallium arsenide (GaAs) is a III-V direct band gap semiconductor with a zinc blende crystal structure.. Gallium arsenide is used in the manufacture of devices such as microwave frequency integrated circuits, monolithic microwave integrated circuits, infrared light-emitting diodes, laser diodes, solar cells and optical windows.
A varistor (a.k.a. voltage-dependent resistor (VDR)) is a surge protecting electronic component with an electrical resistance that varies with the applied voltage. [2] It has a nonlinear, non-ohmic current–voltage characteristic that is similar to that of a diode. Unlike a diode however, it has the same characteristic for both directions of ...
Although silicon's (Si) band gap at 0 K is technically 1.165 eV, the circuit essentially linearly extrapolates the bandgap–temperature curve [7] to determine a slightly higher but precise reference around 1.2–1.3 V (the specific value depends on the particular technology and circuit design); the remaining voltage change over the operating ...
By heating the disulfide in a current of hydrogen, the monosulfide (GeS) is formed, which sublimes in thin plates of a dark color and metallic luster, and is soluble in solutions of the caustic alkalis. [34] Upon melting with alkaline carbonates and sulfur, germanium compounds form salts known as thiogermanates. [47] Germane is similar to methane.
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