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

Obtain the truth table for the logic block, Q. Obtain the truth table for t...

Q. Obtain the truth table for the logic block shown in Figure

Construction of inductor, Construction of inductor An inductor is usual...

Construction of inductor An inductor is usually constructed as a coil of conducting material, typically opper wire, wrapped around a core either of air or ferrous material.

Change management in power distribution, Change Management in Power Distrib...

Change Management in Power Distribution: Organisational change might be described as an organisation-wide effort to augment the effectiveness of an organisation through str

What is the mobile application development all about, In the previous two y...

In the previous two years, a lot of innovation has come in the mobile computing world. Apple has launched very imaginative mobile phone, iphone and ipad along with app store. Googl

Resistivity materials, explain the properties and the application of high r...

explain the properties and the application of high resistivity materials related with tunsten and carbon?

Semiconductor in equilibrium, Semiconductor  in Equilibrium Equilib...

Semiconductor  in Equilibrium Equilibrium in semiconductors implies the following: (i) Steady state: ∂Z / ∂t = 0 In which Z is any physical quantity like charge, volt

PFC, How do you size power factor units at 11kV

How do you size power factor units at 11kV

Determine the parameters of the equivalent circuit, The no-load and blocked...

The no-load and blocked-rotor tests on a three phase, wye-connected induction motor yield the following results: • No-load test: line-to-line voltage 400 V, input power 1770 W,

Evaluate currents in the circuits, Evaluate currents in the circuits: ...

Evaluate currents in the circuits: Determine currents I 1 and I 2 in the given circuits by applying KVL. Solution We apply KVL for first loop : 10 = 1 I 1   + 1 (

Find percent error of both meters when measuring a current, Q. Error specif...

Q. Error specifications on a 10-A digital ammeter are given as 0.07% of the reading, 0.05% of full scale, 0.005% of the reading per degree Celsius, and 0.002% of full scale per deg

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