For n-JFET, the channel is a/an __________ channel and gates are __________.
Understanding n-JFET Channel and Gates
A Junction Field-Effect Transistor (JFET) is a type of field-effect transistor that uses a junction to control the current flow.
There are two main types of JFETs: n-channel JFET (n-JFET) and p-channel JFET (p-JFET).
Structure of an n-JFET
In an n-channel JFET:
- The main semiconductor material forming the channel is typically an n-type semiconductor. This channel connects the source and drain terminals.
- The gate terminals are formed by creating p-type regions within the n-type channel material. These p-type regions form p-n junctions with the n-type channel.
The voltage applied to the gate controls the width of the depletion region at the p-n junction, thereby controlling the conductivity of the n-type channel and thus the current flow between the source and drain.
Based on this structure:
- The channel is an N type channel.
- The gates are made of P type material.
Therefore, for an n-JFET, the channel is an N type channel and the gates are P type.
This matches the description provided in one of the options.
Important Questions from Types of FET
A JFET is also called ________ device.
In JFET, the Pinch‐off Voltage can be defined as:
In JFET, the current density in the x-direction is:
A. σ(x)E x
B. qN DμE x
C. \(\rm \frac{q}{2 \in_s}N_D\mu\)
D. \(\rm \frac{N_D\mu}{2 \in_s}\)
Choose the correct answer from the options given below:
The pull up to pull down ratio for an n mos inverter driven by another n mos inverter can be evaluated from:
(A) Vi nv = V t − \(\rm\frac{V_{t d}}{\sqrt{Zpu/Zpd}}\)
(B) V inv = \(\rm\frac{−V_{t d}}{\sqrt{Zpu/Zpd}}\)
(C) \(\rm\frac{W_{pd}}{L_{pd}}\) (V inv − V t) 2= \(\rm\frac{W_{p u}}{L_{p u}}\) (−V td )2
(D) \(\rm\frac{W_{p d}}{L_{p d}}\) (V inv − V t ) = \(\rm\frac{W_{p u}}{L_{pu}}\) (−V td )2
Choose the correct answer from the options given below:
The layers of Nos involves a subset of layers. For NMOS we require:
(A) Contact, (Black or Brown)
(B) Polysilicon (Green)
(C) Metal (Blue)
(D) Implant (Yellow)
Choose the correct answer from the options given below:
