TRANSISTOR CHARACTERISTIC

Transistor constitutes a semikonduktor's apparatus that have special character. ekuivalensi's ala transistor can be compared with two linked diode with a configuration. Although that transistor character is unlike that diode. Transistor available UNIPOLAR'S one (for example: FET), there is that BIPOLAR (PNP and NPN). Basically transistor works to base current operation principle collector by use of basis current.

In other words basis current experience support until as as big as collector current. This support dependent of amplification factor of each transistor (a and b). Base configuration of series. Transistor as substantiating as is Common Base, Common Emitor and Common Collector. Character of transistor who that saturasi will on assesses particular tension among basis and emitor makes transistor can function as saklar electronics. Assess current support of Transistor get by use of been raised Darlington's configuration.

One transistor has 3 region have already be doped which is emitter, basis and collector.



Pn junction arises between basis and emitter, at conceive of diode emitter. While another pn junction lies basis betwixt and collector, called by collector diode. Both of junction this there is on nonbias's transistor and on each diode have balk potential that approaches 0,7 v on 15°C to silicone transistor.

Emitter is doped so solid / a great many, meanwhile basis just is doped slightly. Collector is doped not overdose and not too few.

On ordinary operation, we give forward tension on emitter's diode and retreat tension on collector diode. Emitter already being doped aplenty, having task to push electron free comes in to go to basis. Meanwhile basis on call overlooks largely electron go to collector. Appropriate collector by the name of mengoleksi that electron. In consequence current on collector, its outgrows well-nigh equal to outgrow it emitter's current. Basis current usually less than 5% emitter's currents.

Was named above there is transistor which bipolar which is PNP and NPN. npn's transistor have region p one lies between region n. is transistor temporary pnp has region n berda's one between region p.


Image upon words to hit aim current that passes transistor. There is conventional current flow and streaming electron which its aim contrary as looked as on image upon. There is three current types that pass transistor which is current emitter IE, IB's basis current and IC's collector current. Relationship among drd current that is:

IE,= IC. + IB

But then since weeny basis current therefore collector current approaches to assess emitter's current:

IC. = IE,

And basis current so infinitesimal appealed by collector current:

IB<< IC.

On transistor exists the so called current lasing dc's beta (bdc). diartikan's current lasing as compare among current dc dc's collector and current basis:


For transistor that have low energy (under 1 w), current lasing usually well worth of 100 until 300. Transistor by high energi (upon 1 w) usually have current lasing as big as 20 until 100.

Transistor has active region, saturated region, cut off's region and breakdown's region. Active region is utilized on linear support, be saturated region and cut off is utilized on digital series.

Transistor has tension operation region, current and maximum energy. Transistor for signal little, can discard energy 1 w or less, be transistor energis will discard energy more than 1 W. transistors characteristic prices get changed because temperature factors. Maximum energy will decrease along with temperature increase.