What is the value of beta in saturation region?

… then, my approach is use the VCEsat vs Ic graph in the datasheet at a certain beta (Ic/Ib)… note: beta in saturation is different from the beta in active region…. in saturation, beta is small (around 10~20) and in active, beta is higher (around 100~400)…..

What is the beta of a bipolar junction transistor?

The values of Beta vary from about 20 for high current power transistors to well over 1000 for high frequency low power type bipolar transistors. The value of Beta for most standard NPN transistors can be found in the manufactures datasheets but generally range between 50 – 200.

What is saturation region of a bipolar transistor?

Saturation: The saturation region allows the transistor to conduct current from the emitter to the collector. With both the base collector junction and the base emitter junction forward-biased, the base current is so strong it exceeds the magnitude at which it can increase the collector current flow.

What is transistor saturation?

Saturation is the on mode of a transistor. A transistor in saturation mode acts like a short circuit between collector and emitter. In saturation mode both of the “diodes” in the transistor are forward biased. That means VBE must be greater than 0, and so must VBC. In other words, VB must be higher than both VE and VC.

When transistor is driven into saturation is collector voltage?

In a standard saturated transistor, the base-to-collector voltage is 0.6 V.

How do you determine when a transistor is saturated when a transistor is in cutoff?

When the transistor is either in saturation or cutoff modes, it dissipates little power. When in cutoff, there is no current flow between collector and emitter thus P = Vce ∗ Ic = 0. When in saturation, the current may be high, but Vce is very small, keeping the power dissipated by the transistor very low.

What is beta in transistors?

That’s a good start, but we need to be more precise: beta is the factor of proportionality between the base current and the collector current of a bipolar junction transistor that is operating in the forward active mode. That’s better, but we’re not done yet, because the situation is actually more complicated than that.

Can a transistor work in beta mode in saturation mode?

No. Transistor will work in different beta in saturation mode and that beta is called as beta forced . When there is sufficiently large base voltage the transistor will be driven into the saturation And collector to emitter voltage is small.

What is the active region of a transistor?

The region between cut off and saturation is known as active region. In the active region, collector-base junction remains reverse biased while base-emitter junction remains forward biased. Consequently, the transistor will function normally in this region. Note.

How does an NPN bipolar junction transistor work?

Let’s say that we’re working with a simple circuit consisting of an npn bipolar junction transistor (BJT) and a couple resistors, connected like so: If you apply a voltage V IN that is high enough to forward-bias the base-to-emitter junction, current will flow from the input terminal, through R B, through the BE junction, to ground.