What is cutoff and saturation region?

In cutoff, the transistor appears as an open circuit between the collector and emitter terminals. In the circuit above, this implies Vout is equal to 10 volts. The second region is called “saturation”. This is where the base current has increased well beyond the point that the emitter-base junction is forward biased.

What is saturation region and cutoff 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.

What is cutoff and saturation?

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.

What is the cutoff region?

Cutoff region

This is the region in which transistor tends to behave as an open switch. The transistor has the effect of its collector and base being opened. The collector, emitter and base currents are all zero in this mode of operation.

What is a saturation region?

The transistor behaves as a closed switch between collector and emitter. The collector – emitter path is short circuited. Every transistor consists of two diodes emitter – base diode and collector to emitter diode in the common emitter configurations.

Active, saturation,

What is saturation and cutoff in transistor?

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. Active -- The current from collector to emitter is proportional to the current flowing into the base.

What is cut off region in MOSFET?

When the input voltage, ( V_IN ) to the gate of the transistor is zero, the MOSFET conducts virtually no current and the output voltage ( V_OUT ) is equal to the supply voltage V_DD. So the MOSFET is “OFF” operating within its “cut-off” region.

What is VCE saturation?

Vce saturation means Ic is at its maximum value(saturated). Ideally we consider Vce to be zero but in actual it is 0.2 to 0.3 volts for upto 50 mA Ic. Note that saturation of Ic is determined by Rc.

What is cutoff mode?

Cutoff mode

We know that in reverse bias condition, no current flows through the device. Hence, no current flows through the transistor. Therefore, the transistor is in off state and acts like an open switch. The cutoff mode of the transistor is used in switching operation for switch OFF application.

What is saturation region in BJT?

The second region is called “saturation”. This is where the base current has increased well beyond the point that the emitter-base junction is forward biased. In fact, the base current has increased beyond the point where it can cause the collector current flow to increase.

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).

How is VCE saturation measured?

First, assume the transistor is saturated, and therefore Vce = Vce(sat). Vce(sat) is usually something like 0.2V, and it's usually safe to use 0V as a first approximation. If we assume Vce(sat) of 0V, we get an Ic = 10V/500 ohms = 0.02A.

What is Mosfet saturation?

First of all, "saturation" in mosfets means that change in VDS will not produce significant change in the Id (drain current). You can think about MOSFET in saturation as a current source. That is regardless of the voltage across VDS (with limits of course) the current through the device will be (almost) constant.

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.

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.

What is saturation state in thermodynamics?

A saturation state is the point where a phase change begins or ends. For example, the saturated liquid line represents the point where any further addition of energy will cause a small portion of the liquid to convert to vapor.

Why do MOSFET saturate?

for a MOSFET, saturation means that the transistor DOES determine the drain current Id. This happens when Vds>Vds,sat.

What is non saturation region in MOSFET?

The conduction happening in this region is known as sub-threshold conduction. Linear or non saturation region – For an NMOS, as gate voltage increases beyond threshold voltage, channel is formed between source and drain terminals.

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.

What is VCE electrical?

The transistor parameter "Vce" signifies the voltage measured between the collector and emitter, which is extremely important because the voltage between the collector and the emitter is the output of the transistor.

What is VCE in common emitter configuration?

In the CE configuration, IB, the input current, and VCE, the output voltage, are the independent variables, whereas the input voltage VBE and the output current IC are the dependent variables.

What is saturation voltage?

saturation voltage, collector-emitter (VCE(sat))

The voltage between the collector and emitter terminals under conditions of base current or base-emitter voltage beyond which the collector current remains essentially constant as the base current or voltage is increased.

What is battery cutoff voltage?

In electronics, the cut-off voltage is the voltage at which a battery is considered fully discharged, beyond which further discharge could cause harm. Some electronic devices, such as cell phones, will automatically shut down when the cut-off voltage has been reached.

What is collector current in transistor?

The collector current, along with the base current, is a product of the energy produced through the emitter circuit, which is divided at the base current's generation through the transistor. Only a fraction of the exiting current is base current, and the remaining portion is considered the collector current.