npn transistor

npn transistor

[′en‚pē′en tran′zis·tər]
(electronics)
A junction transistor having a p-type base between an n-type emitter and an n-type collector; the emitter should then be negative with respect to the base, and the collector should be positive with respect to the base.
References in periodicals archive ?
All CSLFC Ultrasonic Flow Meters have 4-20 mA output as standard with a second output available in the form of an optically isolated NPN transistor, configured at the factory.
The parasitic NPN transistor is formed by the N substrate (parasitic Collector), the P drift region (the Base), and the N well on the topside (the Emitter).
The Basic unit has one 4-20mA and one NPN transistor output, while the most advanced unit has two NPN/PNP transistor outputs and two 4-20mA outputs.
The unit is an NPN transistor manufactured using a new low-voltage planar technology.
The flow transmitters with 4-20 mA output are available in two versions: Basic (one NPN transistor output) and Advanced (two NPN/PNP transistor outputs).
Development of a 25 watt NPN transistor, housed in a plastic encapsulant eliminating the conventional metal semiconductor case, has resulted in a cost of less than 40 cents for each transistor in large quantities.
The UHZ ultrasonic series comes with an 18-30 V dc input supply range and PNP or NPN transistor outputs.
In the battery charger is used one P-channel MOSFET switching transistor driven by ATtiny15 via one bipolar NPN transistor. The schematic of intelligent battery charger is shown in figure 2.
The Hall-effect switches are available with either current sinking (NPN transistor) or current sourcing (PNP transistor) output stages.
As an example, most silicon bipolar integrated circuit wafer processes are designed to make vertical NPN transistors. Ideally, the circuit designer is instructed to make use of the fundamental NPN transistor whenever possible.
Consider, for example, a 400V NPN transistor from Zetex Semiconductors that is capable of switching 500 mA continuously, 1A peak, within a SOT23 flat package less than 1 mm high and with a footprint of 7 [mm.sup.2].