Question: Why VCE SAT Is 0.2 V?

What is the value of VCE during an ideal saturation condition?

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..

What is saturation effect?

Saturation effects occur when any part of a feedback control system reaches a physical limit. … The waterbath is a good example for an asymmetrical saturation function: the heater power has an upper limit dictated by the heating element and the driver power, but the element can only heat.

When a transistor operated in cutoff and saturation region it acts like a?

The four transistor operation modes are: Saturation — The transistor acts like a short circuit. Current freely flows from collector to emitter. Cut-off — The transistor acts like an open circuit.

What is VCE 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 saturation voltage?

The saturation voltage is one of the key items that determine the efficiency of SMPSs. Saturation losses are a function of the voltage dropped across the transistor due to the on-resistance of the switching transistor when conducting and the current flowing through the switching transistor.

What is DC current gain?

The D-C current gain of a transistor is. simply the collector current divided by the base current.

How much is VCE when a transistor is saturated?

“Saturation” in a transistor switch circuit is achieved when the voltage across the collector/ emitter (VCE(sat)) is less than or equal to . 1 to . 3 volts – depending on the type of transistor.

When an NPN transistor is saturated its VCE?

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.

Why is VBE 0.7 V?

The base emitter junction is a PN junction or you can consider that as a diode. And the voltage drop across a silicon diode when forward biased is ~0.7V. That is why most of the books write VBE=0.7V, for an NPN silicon transistor with forward biased emitter junction at room temperature.

Is VBE always 0.7 V?

VBE is the voltage that falls between the base and emitter of a bipolar junction transistor. VBE is approximately 0.7V for a silicon transistor. For a germanium transistor (which is more rare), VBE is approximately 0.3V. Again, this formula, can be used for either silicon or germanium transistors.

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.

How do you know if a transistor is saturated?

Monitor the collector-emitter voltage of your circuit with a DMM. If the reading is below 0.3V, the transistor is at saturation. Transistors are having saturation voltage range from 0.7V and below but for a circuit designed for hard saturation, the VCE will be lower.

How is sat VCE calculated?

Calculate Vce using the formula Vce= Vcc – [Ie * (Rc + Re)]. Using the numbers from the previous examples, the equation works as follows: Vce = 12 – 0.00053 (3000 + 7000) = 12 – 5.3 = 6.7 volts.

How much voltage is needed to turn on a transistor?

In reality, we need a non-zero forward voltage drop (abbreviated either Vth, Vγ, or Vd) from base to emitter (VBE) to “turn on” the transistor. Usually this voltage is usually around 0.6V.

What is beta DC equal to?

calculate alpha DC (emitter to collector dc current gain) and beta DC (base to collector dc curent gain) for a transistor which has Ic=2.5ma, Ie=2.6ma . formula 1) alpha DC=Ic/Ie. formula 2) beta DC =Ic/Ib. formula 3) beta DC = alpha DC/(1-alpha DC)