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Regiones operativas del transistor

bipolar junction transistors have different operating regions, defined mainly by the way they are polarized: _{* Active region:} When a transistor is not is neither in its saturation region or the region is then cut in a region intermediate the active region. In this region the collector current (Ic) depends mainly on the base current (Ib) of β (current gain, is a manufacturer's specification) and resistances that are connected in the collector and emitter. This region is the most important if what you want is to use the transistor as a signal amplifier.

reverse

* Region: _{When reverse polarity conditions of operation in active mode, the bipolar transistor starts operating in reverse. In this mode, the emitter and collector regions switch roles. Since most BJTs are designed to maximize the current gain mode active, the parameter beta in reverse mode is drastically lower than this in active mode.} cutting * Region: A transistor is off when: corrientedecolector = corrientedeemisor = 0, (Ic = Ie = 0)

In this case the voltage between the collector and emitter of transistor is the circuit supply voltage. (As there is no current flowing, there is no voltage drop, do Ohm's Law). This case usually occurs when the base current = 0 (Ib = 0) saturation _{* Region: A transistor is saturated when:}

corrientemaxima corrientedecolector = corrientedeemisor = (Ic = Ie = Imaxima) _{In this case the magnitude of the current depends on the voltage supply circuit and the resistors connected in the collector or issuer or both, see law Ohm. This case usually occurs when the base current is large enough to induce a current collector β times larger. (Remember that Ic = β * Ib)}

Posted by: Emmanuel Angel