A FET is just a material either N or P whereby a restriction is applied by a field volts impressed on the material as restricting the current flow or allow the current flow
RPS is only the voltage& power controlled device. it can only used for set the input for our wish A device which can change its output according to the voltage supplied to it is called a voltage controlled device.ex. a voltage controlled current source,or a field effect transistor. In a voltage controlled current source the output current changes as the voltage supplied to it changes.
transistor is a current controlled device. as the current flows through the base of the transistor , it works like a close switch.
The difference between a current control device and voltage controlled device is that for current controlled device, the current is constant and the voltage is variable while for a voltage controlled device, the voltage is constant and the current is variable.
Bipolar junction transistor(BJT)
A Power MOSFET is a voltage controlled device http://www.profesores.frc.utn.edu.ar/industrial/sistemasinteligentes/UT1/Understandig%20Pwr%20Mosfets.PDF
BJT is Bipolar junction transistor FET is Field effect Transistor It is a current controlled device It is voltage controlled device
RPS is only the voltage& power controlled device. it can only used for set the input for our wish A device which can change its output according to the voltage supplied to it is called a voltage controlled device.ex. a voltage controlled current source,or a field effect transistor. In a voltage controlled current source the output current changes as the voltage supplied to it changes.
FET is abbreviation of Field Effect Transistor. This is a transistor in which current is controlled by voltage only and no current is drawn. It is a high input impedence device and is used in computers, telecommunication and control circuits. This transistor is better in certain parameters as compared to BJT, that is Bipolar Junction Transistor.
RPS is only the voltage& power controlled device. it can only used for set the input for our wish A device which can change its output according to the voltage supplied to it is called a voltage controlled device.ex. a voltage controlled current source,or a field effect transistor. In a voltage controlled current source the output current changes as the voltage supplied to it changes.
transistor is a current controlled device. as the current flows through the base of the transistor , it works like a close switch.
UJT is the voltage controlled device.in which only one mejority carriers are responsible for current flowing. UJT is one junction transistor and it is three terminal emitter and two base. BJT is the current controlled device. in which both mejority and minority carrier are responsiblefor current flowing. this type of transistor consists of two junction and three terminal these are : emitter , base , collector.
The difference between a current control device and voltage controlled device is that for current controlled device, the current is constant and the voltage is variable while for a voltage controlled device, the voltage is constant and the current is variable.
In the switching transistor the output current is controlled by the (current) and this is also called current controlled current device (CCCD). But in ordinary switch we controlled output current physically...
BJT is a current controlled device because its output current is dependent upon the current in the base while for FET it is controlled by the voltage at the gate terminal of the transistor. BJT is a current controlled device because its base current is not zero while for a FET the gate current is zero
It is modeled as a 2-port "black box", where the input terminals accept a current (and are modeled by 'zero' resistance to that current), and the output is a function of the input current. the output may be a voltage or current (or other varying physical parameter, such as resistance). A bipolar transistor is well modeled as a current controlled device. The collector (output) current is a function of the base current: Ic = Beta * Ib. The hybrid-pi model changes that from a current controlled device to a voltage controlled device: Ic = F(Vbe), but the BJT transistor is still basically a current controlled device.
it is not a passive device .y because it is used to amplify the voltage and current .so as according to the definition of active device is the device which is used to amplify the current r voltage .hence transistor is a active device.
Bipolar junction transistor(BJT)