1. A small electronic device containing a semiconductor and having at least three electrical contacts, used in a circuit as an amplifier, detector, or switch. 2. Any of various devices serving the same purpose but employing a different technology: an optical transistor. 3. A transistor radio....
If you want to use the transistor as a switch, you want to have the transistor in the Cut-off region (open switch) or the Saturation region (closed switch). If you want to use the transistor as an amplifier, it is the Active region you want to be in. In the active region, the c...
Three-transistor modulator-amplifier circuit works with swept-control frequencies.(Editorial)Rowe, MartinGranville, Fran
In this configuration, the unaddressed cells act as ON pass gates regardless of their actual threshold, which is typically much smaller. A read operation is carried out by lowering the word line down to 0 V, and detecting either a current, or no-current flow, on the bit line. In the ...
Used as an amplifier Used in Darlington pairs Used in motors to regulate current Symbol of PNP PNP Transistor Symbol PNP junction transistor is a current-controlled device in which both the collector and emitter currents are controlled by the base current. On the left side is the emitter-base ...
However the doping in this region is kept low and there are comparatively few holes available for recombination. As a result most of the electrons are able to flow right through the base region and on into the collector region, attracted by the positive potential....
In this mode of a transistor, the base-emitter junction is forward bias and collector-base junction is reverse biased. In this mode, the transistor operates as a current amplifier. The current flows between emitter and collector and the amount of current are proportional to the base current. ...
" The Base region loses some electrons upwards. As soon as the positively charged Collector has yanked some electrons out of the Base segment, more electrons can finally pour in from below... which gives us more wandering electrons to be yanked upwards, and so on. A fairly huge vertical ...
this transistor works like a switch then it supports 100mA of current. Similarly, it supports 100MHz when it works as an amplifier. A similar 2N3904 NPN transistor is 2N2222A. This transistor is available in the TO-92 package & used in different applications like TV, switch, amplifier, ...
A p-channel device works the same way but with all polarities reversed. The metal-oxide semiconductor field-effect transistor (MOSFET) is a variant in which a single gate is separated from the channel by a layer of metal oxide, which acts as an insulator, or dielectric. The electric field...