Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 8: Problem 3

For a JFET having device parameters \(g_{m 0}=5 \mathrm{mS}\) and \(V_{P}=-4 \mathrm{~V}\), what is the device current at \(V_{G S}=0 \mathrm{~V} ?\)

Short Answer

Expert verified
The device current at \(V_{GS} = 0 V\) is 20 mA.

Step by step solution

01

Identify given parameters

In the problem, you're given the parameters \(g_{m0} = 5 mS = 5 \times 10^{-3} S\), \(V_P = -4 V\) and \(V_{G S} = 0 V\).
02

Calculate \(I_{DSS}\)

Calculate the parameter \(I_{DSS}\) using the equation \(I_{DSS} = g_{m0}|V_P|\), substituting the given values into the equation gives: \(I_{DSS} = 5 \times 10^{-3} \times 4 = 20 \times 10^{-3} A = 20 mA \).
03

Calculate the device current \(I_{D}\)

Substitute \(I_{DSS}\) and \(V_{GS}\) into the equation \(I_{D} = I_{DSS}[1 - (V_{GS} / V_P)]^2\), This gives: \(I_{D} = 20[1 - (0 / -4 )]^2= 20 mA\).

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

A JFET \(\left(I_{D S S}=10 \mathrm{~mA}, V_{P}=-5 \mathrm{~V}\right)\) is biased at \(I_{D}=I_{D S S} / 4\). What is the value of \(g_{m}\) at that bias point?

a. Plot \(g_{m}\) versus \(V_{G S}\) for an \(n\) -channel JFET with \(I_{D S S}=12 \mathrm{~mA}\) and \(V_{P}=-6 \mathrm{~V}\). b. Plot \(g_{m}\) versus \(I_{D}\) for the same \(n\) -channel JFET as part (a).

Calculate \(g_{m 0}\) for a JFET having device parameters \(I_{D S S}=12 \mathrm{~mA}\) and \(V_{P}=-4 \mathrm{~V}\).

Determine the pinch-off voltage of a JFET with \(g_{m 0}=10 \mathrm{mS}\) and \(I_{D S S}=12 \mathrm{~mA}\).

If a JFET having a specified value of \(r_{d}=100 \mathrm{k} \Omega\) has an ideal voltage gain of \(A_{v}(\mathrm{FET})=-200\), what is the value of \(g_{m}\) ?
See all solutions

Recommended explanations on Physics Textbooks

Thermodynamics

Read Explanation

Waves Physics

Read Explanation

Electromagnetism

Read Explanation

Medical Physics

Read Explanation

Scientific Method Physics

Read Explanation

Particle Model of Matter

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free