Junction Field Effect Transistor JFET

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=3Zf-Ta-94l4

This video explains the construction, and working of N-channel JFET and P-channel JFET, Different types of FETs and the output characteristic curves (Drain curves) are also discussed. • JFET (Junction Field Effect Transistor) : • The junction field Effect Transistor (JFET) is used in a wide range of applications. It is a three-terminal device (Gate, Drain, and Source), That uses an electric field to control the current flowing through the device. It is a voltage-controlled device, where the input voltage controls the output current. • Types of FET: • There are mainly two types of FETs: • 1) JFET and 2) IG-FET • 1) JFET (Junction Field Effect Transistor): • N-channel JFET • P-channel JFET • 2) IG-FET (Insulated Gate Field Effect Transistor) • MOSFET (Metal Oxide Semiconductor Field Effect Transistor) is the most common type of IG-FET, where a layer of SiO2 is used as an insulating layer to insulate the gate from the channel. • The MOSFET can be further classified into • Depletion-type MOSFET (N-channel and P-channel) • Enhancement-Type MOSFET (N-channel and P-channel) • N-channel JFET: • The channel is made up of N-type semiconductor material and two small P-type regions are attached at the opposite sides of the middle part of the channel. • P-channel JFET: • The channel is made up of P-type semiconductor material and two small N-type regions are • attached at the opposite sides of the middle part of the channel. • JFET operates in different regions: • 1) Ohmic region • 2) Saturation Region • 3) Cut-off Region • 4) Avalanche breakdown Region • Application of FETs: • 1) Cascade Amplifier • 2) Oscillator • 3) Analog Switch • 4) Multiplexer • 5) Chopper • Differences between the BJT and FET : • 1) The FET is a unipolar device, while BJT is a bipolar device • 2) The input impedance of FET is very high compared to BJT • 3) The Noise level of a FET is less than BJT • 4) In size, the FETs are smaller than BJT • 5) FETs are Voltage controlled devices where BJTs are Current controlled devices • 6) FETs have faster switching speed than BJTs • Timestamps for various topics covered in this video are as follows: • 0:34 Types of Transistors • 1:20 What is Field Effect Transistor (FET)? • 1:46 Construction of N-Channel and P-Channel JFETs • 3:24 Working of N-Channel JFET • 6:45 Depletion regions formation in a JFET • 8:57 Output characteristic curve of N-Channel JFET • 10:06 Pinch-off voltage of JFET • 12:37 Different regions of operation of an N-channel JFET • 15:06 How does JFETs Gate voltage controls the Drain current? • 18:28 Working of P-Channel JFET • 20:03 JFET as an Amplifier • 22:48 Differences between JFET and BJT • 23:42 Applications of JFET • This video will be helpful to all students of science and engineering in understanding the construction and working of JFET. • The links for the other useful videos: • 1) Bipolar junction transistor (BJT) • • Transistor (Bipolar Junction Transist... • • 2) PN Junction Diode • • PN Junction Diode and V-I Characteris... • 3) Semiconductors (P-type and N-type) • • Semiconductor: P-Type and N-Type, Int... • 4) Avalanche Breakdown and Zener Breakdown • • Avalanche Breakdown and Zener Breakdo... • 5) Zener Diode as a Voltage Regulator • • Zener Diode as a Voltage Regulator, (... • • #JFET • #JFETWorking • #NchannelJFET • #PchannelJFET • #FET • #TypesofFET • #What is the difference between JFET and BJT? • #What is JFET and its characteristics? • #What is JFET used for? • #What is JFET and its types? • #What is JFET? • Please SUBSCRIBE to my YouTube channel • ‪@ElectronicsAD‬ • Music Credit: • http://www.bensound.com/ • Keep Learning and Keep Growing .

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