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33 Threads found on edaboard.com: Mosfet Saturation Voltage
Hello. I just want to know whether we can refer bias voltage to mosfet operating in the triode region.. I've thought bias voltage means making mosfet operate in the saturation region. Thank you.
A mosfet designed for the intended current has Rdson in the milliohm range...
Maybe you are thinking about an ordinary transistor saturation and linear. A mosfet is the opposite: 1) It is turned on hard like a switch when it is a linear resistor. 2) It is an amplifier with plenty of drain to source voltage when it is saturated.
i have some question please answer it. 1) Due to velocity saturation When mosfet reaches to its saturation i mean Before Pinch OFF or After PInch off,OR at Q point 2)which system uses DC to DC high voltage gain Solar system or battery backup system
How to understand how power MOS help maintain output voltage of LDO while it works in saturation region? Thanks. Can you build a CS amplifier that his drain voltage (VD) is equal to 0.5Vdd or 2/3Vdd ?? In which region mosfet is operating? In saturation ? So how it is possible if MOS work as a VCCS? Also (...)
Most people are confused with "saturated" and "active" regions for a mosfet because they are the opposite to a bipolar transistor. Power= the voltage across it times the current flowing in it. When a mosfet is fully turned on it has high current but almost no voltage then its power dissipation is very low. When a (...)
Hello, Before posting I have checked several posts but was unable to collect infromation solving my problem. It seems to be simple, sadly it is not
maybe the following current formula of transistor explain this: 99947 this is the formula when mosfet try to operate in linear mode and move to saturation. for lower threshold voltage, the induced driving current increase faster than those with higher vt. I think that it's the reason why the low threshold has better perform
It seems like mosfet is in linear mode rather than on saturation mode. As expectable with the shown driver circuit. Driver voltage must be at least 6V above Vin to switch the mosfet fully on, needing an additional supply and stressing the mosfet driver up to the maximum rating.
I do not know about simulation but any amplifier device including a mosfet must be biased to amplify. If you rather use the mosfet to switch on/off, saturation setting can be useful for a good efficiency. Low-level signal amplifier is usually biased in the "linear" response region; high-level amplification calls for (...)
I wonder why it's necessary to use 200 or even 500 kHz for LED dimming? Apart form the many right things that have been already said about mosfet's versus BJT for fast switching, there's another rather simple point. BJT need to be operated with sufficient base current to achieve low saturation voltage. Do you know where you get the base (...)
In saturation the mosfet acts as a voltage controlled current source.We get around the nonlinear relation to obtain linear amplification. By dc Biasing we make mosfet operate at a certain VGS and ID & then superimpose the signal to be amplified vgs on the dc bias VGS.Keeping the signal vgs small changes in iD almos
i want to switch load of 2amp (GSM modem) can any one advice any mosfet to use, preferably smd one. for some reason gsm modem is not responding to off key so i have to cut its power supply. i am using 3.3v pic and gsm modem needs about 4.2v thanks
could any tell me how to find the early voltage of a mosfet using spctre simulation tool, It would be really grt if you could suggest the steps rather than telling me the equations (plenty of suggestions are there just giving the equations, already posted ) thanks in advance
I read that in an n-mosfet, when drain voltage is increased above threshold (in saturation mode) the inversion channel between the source and drain is pinched-off near the drain region. so the channel length decreases and so its resistance. so larger current flows through the channel. My doubt is, when a smaller portion is pinched off near (...)
I JUST NEED TO MAINTAIN THE OUTPUT voltage AT 24V Circuit diagram of the proposed system Figure 10 shows that power stage included switch SW where it may consists of one or more parallel connected power mosfet, a fast switching type flyback diode D, an inductor L wound onferrite core with air gap to prevent core saturation, and output (...)
Read this to understand what is cut-off, linear and saturation regions of the mosfet: Now, changing in small limits the Vbias can change the output level. This you should do before asking any questi
1) check the Vce (emitter-collector saturation voltage) and compare that to the Rds-on (drain-source resistance when on) of a mosfet, calculate the power loss for the same current 2)Compare the Rds-on of P mosfet with the Rds-on of N mosfet Alex
mosfet have ohmic region while bjt doesn't. Hence mosfets i/p is voltage controlled while bjt i/p is current controlled.
In a P mosfet you apply a positive voltage in the source pin, to make the mosfet conduct the gate voltage must be lower than the source. Alex