Characteristics of common drain amplifier, Electrical Engineering

Characteristics of Common Drain Amplifier

1575_Characteristics of Common Drain Amplifier 1.png

                               Figure: Basic N-channel JFET source follower circuit (neglecting biasing details).

Voltage gain:

AV = Uout / Uin = gmRs/gmRs + 1 ≈ (gmRs >> 1)

Current gain:

Ai =

Input impedance:

rin =

Output impedance: 

(The parallel notation A||B points out the impedance of components A and B that are connected in parallel)

rout = RS || 1/ gm

= (Rs/ gm) / (Rs + (1/ gm))

 

 = Rs / gm Rs+1 ≈ 1/ gm (gm Rs >> 1)

The variable gm that is not listed in Figure is the transconductance of the device (generally given in units of siemens).

1918_Characteristics of Common Drain Amplifier 2.png

                                       Figure: Basic N-channel MOSFET common-source amplifier with active load ID.

682_Characteristics of Common Drain Amplifier 3.png

                                      Figure: Small-signal circuit for N-channel MOSFET common-source amplifier.

Posted Date: 1/11/2013 2:01:12 AM | Location : United States







Related Discussions:- Characteristics of common drain amplifier, Assignment Help, Ask Question on Characteristics of common drain amplifier, Get Answer, Expert's Help, Characteristics of common drain amplifier Discussions

Write discussion on Characteristics of common drain amplifier
Your posts are moderated
Related Questions
Question: (a) The conversion of a time varying analog audio signal into digital form is carried out using an electronic circuit known as a (signal) encoder. Draw a labeled bl

Zero-Bias Equilibrium In a p-n junction, with no an external applied voltage, an equilibrium condition is arrived at in which a potential variation is formed across the juncti

Stator Voltage Control Methods By  controlling  the applied voltage  the speed  of an  induction motor  can be  controlled. Since  the output  torque of 3-? induction motor  i

#how to draw bode plots for a transfer function

A selection form an application's menu, or a command typed in by the user, like at a DOS prompt or at the Run dialog box in Windows.

Stack Operation Stack is a group of memory  locations which  are part of the  same read write memory  used for  storing  data  temporarily  during the execution of the  progra



Q. Describe Common-Mode Rejection Ratio ? When there is a common-mode input voltage, i.e., when the input signals are equal and greater than zero, the output voltage of an idea

Q. For the circuit shown in Figure, develop and execute a PSpice program to obtain the node voltages and the current through each element.