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in case p type semiconductor mosfet the carriers are holes whose mobility is much less then electrons hence they are not used.
when mosfets were introduced originally PMOS was much more common than NMOS, because process for PMOS devices was simpler. but as process methods improved things transitioned to NMOS due to higher speed of operation due to greater carrier mobility (as explained above) and eventually CMOS due to lower power consumption.
The same was true for similar reasons with bjts: PNP was easier to make but NPN was faster.
What else can I help you with?
Why do you use semiconductors while the conductors are in use?
Semiconductors might sound somewhat 'inferior' in comparison to 'conductors', but they are - due to their unique properties - indispensable in modern electronics. Semiconductors, generally, make it easily possible to control the direction and flow of electric current which is the basis of most modern electronic device.
Devices which use semiconductors use current to operate than those which do not use semiconductors?
less
What are using semiconducter?
Computer use semiconductors all machine with microchips use semiconductors
How do you keep mosfet from overheating i use only mosfet and control it using variable resistor it works but it gets overheated and brokedown.My battery operated scooter is 24v dc 72 amp.thank you.?
Use a mosfet driver instead of a simple resistor. Using a resistor to control the mosfet is a bad idea anyways because you will have terrible control (mosfets are voltage controlled. Take a look at the response curve for your mosfet). If your mosfet is fully on, its ratings may be too low for continuous operation or the power dissipation is too low for the transition between off an on an that is killing your mosfet.
Use uc3707n FOR 500W mosfet power amplifier circuit diagram?
not yet
What is the use of load line?
It helps us to select the Q - point of the BJT, MOSFET etc.
Why do we mostly use indirect semiconductors?
The indirect band gap semiconductors like silicon and germanium are mostly used because they are elemental, plentiful, and easier to process than the direct band gap semiconductors which are alloys or compounds.
Devices that use semiconductors to produce electricity from solar energy are?
Photovoltaic cells
What is ac chopper?
AC chopper is also called AC voltage controller. In AC voltage controller, we use 2 thyristors as switching element. In AC chopper we use MOSFET or IGBT as switching element with diodes in bridge rectifier for bidirectional flow of current. This use of mosfet switch has the following advantages over thyristor: * no separate firing circuit are needed for Mosfet ( it can be driven directly by interfacing it with MC) whereas firing circuits are needed for SCR. *when the line current drops to zero SCR turns off due to natural commutation( when it reaches 172 deg) ; mosfet- user control - we can turn on and off as per our requirement. * snubber circuit is needed for thyristor phase control method. By using mosfet in diode rectifier provides internal snubber
What are the differences betweeen e-mosfet and d-mosfet?
An e-mosfet is and "enhancement" mosfet. A d-mosfet is a "depletion" mosfet. These essentially show what mode the mosfet operates in when a voltage is applied to the gate. . An enhancement mode mosfet is normally non-conducting but conducts when the channel is enhanced by applying a voltage to the gate and pulling carriers into the channel. A depletion mode mosfet normally conducts but becomes more and more non-conducting as carriers are depleted or pulled out of the channel by applying a voltage. The polarity of the voltage depends on whether it is an N channel or P channel. P channel uses positively doped silicon while N channel uses negatively doped silicon. N channel fets are used wherever possible because N material conducts better than P material. There are basically two types of fet, the jfet and the mosfet. The jfet uses a single junction to control the channel hence draws some current. Bipolar transistors use two junctions. In the mosfet (Metal Oxide Semiconducting Field Effect Transistor) there is no such junction hence draw so little current for control purposes it can be regarded as zero. The gate is isolated from the channel by a very thin layer of metal oxide (usually chromium dioxide). An enhacement mode mosfet can be turned on by applying a voltage then removing the wire to the gate. The channel will then remain conducting for some time.
What are devices that use semiconductors to produce electricity from solar energy?
Solar panels are devices that use semiconductors to convert sunlight into electricity. Semiconductors such as silicon are used in photovoltaic cells within solar panels to absorb photons from sunlight and generate an electric current through the photovoltaic effect. This electricity can then be used to power electronic devices or stored in batteries for later use.
Why you use FET?
FET's improve the switching frequency from KHZ to MHZ.. FET can be used as temperature sensor.. and mosfet is used as a switch..
