What is active region saturation region and cut off region?

In cut off region, both emitter to base and base to collector junction is in the reverse bias and no current flows through the transistor. The transistor acts as an open switch. In the saturation region, both the junctions are in forwarding bias,and the transistor acts as a closed switch.
Takedown request   |   View complete answer on electricalvolt.com


What is active region saturation region and cutoff region?

a)When both collector-base & base-emitter junction is reverse biased, it is the active region. b)When both collector-base & base-emitter junction is forward biased, it is the saturation region.
Takedown request   |   View complete answer on khanacademy.org


What is the difference between saturation and cutoff?

Saturation -- The transistor acts like a short circuit. Current freely flows from collector to emitter. Cut-off -- The transistor acts like an open circuit. No current flows from collector to emitter.
Takedown request   |   View complete answer on learn.sparkfun.com


What is called active region?

Active region is that region in which the emitter base junction is forward biased while the collector base junction is reverse biased.
Takedown request   |   View complete answer on vedantu.com


What is meant by cutoff region?

Cut off region

As the base current is zero, only small collector leakage current flows. The base emitter junction does not remain in the forward biased because the base current is zero. The collector to emitter voltage is equal to VCC.
Takedown request   |   View complete answer on myelectrical2015.com


Active, saturation,



What is saturation region MOSFET?

Saturation Region

In the saturation or linear region, the transistor will be biased so that the maximum amount of gate voltage is applied to the device which results in the channel resistance RDS(on being as small as possible with maximum drain current flowing through the MOSFET switch.
Takedown request   |   View complete answer on electronics-tutorials.ws


What is saturation in transistor?

After that point, collector current remains constant, independent of base-emitter voltage i.e., the current saturates. Saturation region is that stage of a transistor in which collector current doesn't increase with base-emitter voltage (the input source). Therefore, it behaves like a wire.
Takedown request   |   View complete answer on quora.com


What is meant by saturation region?

Saturation region

This is the region in which transistor tends to behave as a closed switch. The transistor has the effect of its collector and Emitter being shorted. The collector and Emitter currents are maximum in this mode of operation.
Takedown request   |   View complete answer on tutorialspoint.com


What is cut off mode in transistor?

In the cutoff mode, both the junctions of the transistor (emitter to base and collector to base) are reverse biased. In other words, if we assume two p-n junctions as two p-n junction diodes, both the diodes are reverse biased in cutoff mode. We know that in reverse bias condition, no current flows through the device.
Takedown request   |   View complete answer on physics-and-radio-electronics.com


What do you mean by a saturation region B cut off C active region?

At cut off, the base-emitter junction no longer remains forward biased and normal transistor action is lost. The collector-emitter voltage is nearly equal to VCC i.e. VCE (cut off) = VCC. (ii) Saturation. The point where the load line intersects the IB = IB(sat) curve is called saturation.
Takedown request   |   View complete answer on instrumentationtools.com


What is active mode in transistor?

A transistor is said to be in its active mode if it is operating somewhere between fully on (saturated) and fully off (cutoff). Base current regulates collector current. By regulate, we mean that no more collector current can exist than what is allowed by the base current.
Takedown request   |   View complete answer on allaboutcircuits.com


What are the three regions of a transistor?

A BJT consists of three differently doped semiconductor regions: the emitter region, the base region and the collector region. These regions are, respectively, p type, n type and p type in a PNP transistor, and n type, p type and n type in an NPN transistor.
Takedown request   |   View complete answer on en.wikipedia.org


What is saturation mode of BJT?

BJT in Saturation Mode. • When the collector voltage drops below the base voltage, the collector-base junction is forward biased Base current increases so that the current biased. Base current increases, so that the current gain (IC/IB) decreases.
Takedown request   |   View complete answer on home.iitj.ac.in


What is the condition for saturation?

What is the condition for saturation? Explanation: The condition for saturation is Vds = Vgs – Vt since at this point IR drop in the channel equals the effective gate to channel voltage at the drain. Explanation: The threshold voltage for nMOS depletion denoted as Vtd is negative.
Takedown request   |   View complete answer on sanfoundry.com


What is active region in MOSFET?

The active region is characterized by a constant drain current, controlled by the gate-source voltage. The MOSFET operates at the active region when the constraint stated in (2.9) is satisfied.
Takedown request   |   View complete answer on sciencedirect.com


What is the condition of cut off region Mcq?

Which of the following condition is true for cut-off mode? Explanation: The base current as well as the collector current are zero in cut-off mode.
Takedown request   |   View complete answer on lastmomenttuitions.com


Why it is called saturation region in BJT?

Originally Answered: Why is saturation region called so in BJT characteristics ? A2A. The collector current becomes constant and doesn't increase with increase in base current (saturates). Hence the name.
Takedown request   |   View complete answer on quora.com


What is saturation in circuits?

Saturation is the fully conducting state in a semiconductor junction. The term is used especially in applications involving diodes and bipolar transistor s. As the forward bias in a semiconductor P-N junction increases, the current through the junction also increases, up to a certain point.
Takedown request   |   View complete answer on techtarget.com


What is collector cutoff current?

Collector cutoff current is the IC that still flows when the specified VC and a specified reverse bias is applied. It is normally less than either ICEO or ICER (collector current with the base open, or with the base resistively connected to the emitter).
Takedown request   |   View complete answer on tek.com


What is pinch off region in MOSFET?

This phenomenon is known as “pinch-off” and the point where the inversion layer thickness is reduced to zero is called the “pinch-off point.” Pinch-off occurs because, at VSAT, the effective potential between the gate and substrate at the source end of the channel (Veff = VGS) is greater than the potential between the ...
Takedown request   |   View complete answer on mksinst.com


What is the difference between ohmic and saturation regions?

Ohmic or linear is the region where ID is a function of vGS and VDS. Id rises ( very ) roughly linearly with VDS, hence the name 'linear'. Saturation is the region of constant ID, determines by VGS-VT.
Takedown request   |   View complete answer on forum.allaboutcircuits.com


What is pinch off point in MOSFET?

Question: In a MOSFET, What does the pinch off voltage refers to? Answer: This refers to the voltage Vds that counteracts the opening of the n-channel (NMOS), at the drain end. Since the width of the channel is a function of Vgs - Vtn, the mosfet saturates (pinches off) when Vds is greater or equal than/to Vgs - Vtn.
Takedown request   |   View complete answer on learnpick.in


What is active region for BJT?

Between cutoff and saturation along the load line is the active region of the BJT or also known as linear region. For the BJT to operate in the active region, the condition is that the base-emitter junction should be forward-biased while the base-collector junction is reverse-biased.
Takedown request   |   View complete answer on circuitbread.com


What are the two types of BJT?

A bipolar transistor (bipolar junction transistor: BJT) consists of three semiconductor regions forming two junctions. There are two types of structure: npn and pnp. Products with npn up to 800 V and pnp up to -600 V are available. In addition, there are also bias resistor built-in transistors (BRTs).
Takedown request   |   View complete answer on toshiba.semicon-storage.com


How do you find the transistor saturation region?

A transistor goes into saturation when both the base-emitter and base-collector junctions are forward biased, basically. So if the collector voltage drops below the base voltage, and the emitter voltage is below the base voltage, then the transistor is in saturation.
Takedown request   |   View complete answer on electronics.stackexchange.com