Electron Devices: Chapter 5: Field Effect Transistors

Construction of n-Channel JFET

Home | Department: ECE Department | Ist Year | Subject: Electron Devices |

Question: Explain with neat sketch construction of n‒channel FET. Give also its symbol.

Construction of n-Channel JFET

• Fig. 5.2.1 shows structure and symbol of n‒channel JFET. A small bar of extrinsic semiconductor material, n type is taken and at its two ends, two ohmic contacts are made which are the drain and source terminals of FET.

• Heavily doped electrodes of p type material form p‒n junctions on each side of the bar. The thin region between the two p gates is called the channel. Since this channel is in the n type bar, the FET is known as n‒channel JFET.

• The electrons enter the channel through the terminal called source and leave through the terminal called drain. The terminals taken out from heavily doped electrodes of p type material are called gates. Usually, these electrodes are connected together and only one terminal is taken out, which is called gate, as shown in Fig. 5.2.1.

Review Question

1. Explain with neat sketch construction of n‒channel FET. Give also its symbol.

Electron Devices: Chapter 5: Field Effect Transistors : Tag: electronics : - Construction of n-Channel JFET

Home | Department: ECE Department | Ist Year | Subject: Electron Devices |

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Electron Devices: Chapter 5: Field Effect Transistors

Field Effect Transistors - Symbol, Features, Classification

Construction of n-Channel JFET

Construction of p-Channel JFET

Operation of p-Channel and n-Channel JFET

Characteristics of JFET

JFET: The Pinch-off Voltage

Characteristics Parameters of JFET

Drain Current Equation of JFET

Comparison of BJT and FET

Applications of JFET

MOSFET

Depletion MOSFET (D-MOSFET) - Construction, Operation, Characteristics, Parameters, Type, Symbols

Enhancement MOSFET (E‒MOSFET) - Construction, Operation, Characteristics, Circuit Diagram, Parameters, Type, Symbols, Example Solved Problems

Channel Length Modulation in MOSFET

Comparison of MOSFET with JFET

Comparison of D-MOSFET and E-MOSFET

Comparison between N-Channel and P-Channel MOSFET

Comparison between N-channel and P-channel JFET

Comparison of BJT with MOSFET

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CMOS - Advantages, Disadvantages, Applications, Basic Operation as an Inverter

Field Effect Transistors: Important Example Solved Problems - Electron Devices

Field Effect Transistors: Two Marks Important Questions and Answers - Electron Devices

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