What do you mean by transconductance, Electrical Engineering

Assignment Help:

Q. What do you mean by Transconductance?

The  control that the gate voltage has over the drain current is measured by transconductance and is similar to the transconductance of the tube.It may be defined as follows:

It is is the ratio of the change in drain current (ΔId) to the change in gate source voltage(Vgs) at constant drain source voltage that is

Transconductance = Id / Vgs at constant Vds.

The transconductance of a JFET is usually  expressed either in mA or microamperes.

Amplification factor(µ)

It is  the ratio of change in drain source voltage to the change in gate source voltage at constant drain current

Amplification factor= ΔVds/ ΔVgs at constant Id

Amplification factor of a JFET indicates how much more control the gate voltage has over drain current than has the drain voltage.

Relation among JFET parameters.

The relationship among JFET parametes can be established as under:

We know µ=Vds/ Vgs

Hence

µ = rd*gfs.

Amplification factor = a.c drain resistance * transconductance.


Related Discussions:- What do you mean by transconductance

Illustrate computer-controlled routing, Q. Illustrate Computer-controlled r...

Q. Illustrate Computer-controlled routing? Computers are employed in network with common channel signaling (CCS) features. In CCS, there is a separate computer-controlled signa

Input output operations , Input Output Operations Many times microproc...

Input Output Operations Many times microprocessor has to  accept data  from input port and send data to  output  port to  interact with the  real world. Input  port is  tri st

Name 5 different addressing modes, The five addressing modes are given belo...

The five addressing modes are given below: Immediate, Register, Direct, Implied addressing modes           Register indirect,

Explain corrosion, Explain Corrosion. Corrosion: The process of constan...

Explain Corrosion. Corrosion: The process of constant eating (or destruction) up of metals (by the surface) by the surrounding is termed as corrosion. These metals are corroded

Motor, 2. A 6 pole lap-wound armature having 720 conductors, rotates in a f...

2. A 6 pole lap-wound armature having 720 conductors, rotates in a field of 20.35 mWb. (a) If the induced current is 72 A, what is the torque developed by armature? (b) If the indu

Find the output voltage in terms of the input voltage, Q. Find the output v...

Q. Find the output voltage in terms of the input voltage? In order to illustrate the insensitivity of feedback circuits to variations of the op-amp parameters, let us consider

Differences between a timer and a counter, Question : a) Embedded Syste...

Question : a) Embedded Systems will be Hard Real-Time Systems, Soft Real-Time Systems and Hybrid Real-Time Systems. Briefly explain all three types of Real-Time Systems, using

What do you mean by signal processing, Q. What do you mean by Signal Proces...

Q. What do you mean by Signal Processing? The essential feature of communication, control, computation, and instrumentation systems is the processing of information. Because of

Determine the forced component of the voltage, Q. Consider an RL series cir...

Q. Consider an RL series circuit excited by (a) v(t) = 20e -2t V, and (b) v(t) = 20 V. Determine the forced component of the voltage across the inductor for R = 2  and L = 2H.

Calculate motor efficiency, 1. A self excited shunt generator supplies a lo...

1. A self excited shunt generator supplies a load of 12.5 kw at 125 volts. The field resistance is 25 ohms and the armature resistance is 0.2 ohms. The total voltage drop because o

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd