Youtor
Basic Operation of FETs
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=lNC3fzlcljk
A FET (Field-Effect Transistor) is a three-terminal semiconductor device that is widely used in electronic circuits for amplification and switching applications. It operates based on the principle of electric fields controlling the conductivity of the channel between the source and drain terminals. The basic operation of a FET can be explained as follows: • Structure: A FET consists of three main components: a source terminal (S), a drain terminal (D), and a gate terminal (G). The transistor is typically made of doped semiconductor material, such as silicon or gallium arsenide. • Types of FETs: There are two main types of FETs: MOSFET (Metal-Oxide-Semiconductor FET) and JFET (Junction Field-Effect Transistor). MOSFETs are more commonly used and are further classified into two subtypes: enhancement-mode and depletion-mode. • Enhancement-Mode MOSFET: In an enhancement-mode MOSFET, the channel between the source and drain is initially non-conductive or pinched off when no voltage is applied to the gate terminal. To make the channel conductive, a positive voltage is applied to the gate terminal relative to the source terminal. This positive voltage creates an electric field that attracts minority charge carriers (electrons or holes) to form a conductive channel, allowing current to flow from the source to the drain. • Depletion-Mode MOSFET: In a depletion-mode MOSFET, the channel is initially conductive, and current can flow even without a gate voltage. Applying a negative voltage to the gate terminal relative to the source terminal depletes the majority charge carriers in the channel, narrowing the conductive path and reducing the current flow. • JFET: JFETs, on the other hand, have a channel that is inherently conductive without the need for an external voltage. They operate based on the reverse-biased pn-junction between the gate and channel regions. Applying a voltage across the gate-channel junction controls the width of the conductive channel and, consequently, the current flow. • Voltage Control: One of the key characteristics of FETs is that they are voltage-controlled devices. The voltage applied to the gate terminal controls the conductivity of the channel and, therefore, the flow of current between the source and drain terminals. • #FETs #pinchoff #voltages #fieldeffect #transistors #eevibes #electronicdevices #EDC #electronics #electronicengineering #devices #circuits #circuittheory
#############################
