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Simplified cross section of a planar NPN bipolar junction transistor. BJTs consists of three differently doped semiconductor regions: the emitter region, the base region and the collector region. These regions are, respectively, p type, n type and p type in a PNP transistor, and n type, p type and n type in an NPN transistor.
According to stability boundary charts published in the original datasheet, TL431 is absolutely stable when C L is either less than 1 nF, or greater than 10 μF. [21] [22] Inside the 1 nF–10 μF range the likelihood of oscillation depends on the combination of capacitance, I CA and V CA. [21] [22] The worst-case scenario occurs at low I CA ...
For an NPN open emitter output, the collector is connected to the positive voltage rail, so the emitter outputs a high voltage when the transistor is on and is hi-Z when off. For a PNP open emitter output, the collector is connected to the low voltage supply, so the emitter outputs a low voltage when the transistor is on and is hi-Z when off.
The Type 575 Transistor-Curve Tracer displays the dynamic characteristic curves of both NPN and PNP transistors on the screen of a 5-inch cathode-ray tube. Several different transistor characteristic curves may be displayed, including the collector family in the common-base and common emitter configuration.
The manufacture of semiconductors controls precisely the location and concentration of p- and n-type dopants. The connection of n-type and p-type semiconductors form p–n junctions . The most common semiconductor device in the world is the MOSFET (metal–oxide–semiconductor field-effect transistor ), [ 1 ] also called the MOS transistor .
Micro switch – Mechanically activated switch with snap action; Limit switch – Mechanically activated switch to sense limit of motion; Mercury switch – Switch sensing tilt; Centrifugal switch – Switch sensing centrifugal force due to rate of rotation; Relay or contactor – Electro-mechanically operated switch (see also solid state relay ...
Devaughn Vele gets a good grade for concentration. The Denver Broncos receiver couldn't have figured that he would catch a touchdown when Bo Nix threw it toward the back of the end zone.
PNP transistor symbol with case (IEEE 315). Note: A little confusing on the BJT page, because the NPN is drawn with Collector (C) on the top, while here it is drawn on the bottom. Date: 11 November 2007: Source: Own work: Author: Zedh: Other versions.svg:
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