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
with the aid of the diagram explain the following rules that can be used to determine the direction of magnetic fields around a current carrying conductor (1)cork screw rule (2)rig

N-type semiconductor is an example of (A)  Extrinsic semiconductor.            (B) Intrinsic semiconductor. (C)  Super conductor.                        (D)  Insulators.

Suppose that the x rays are emitted from a focal spot isotropically. The photon flux is 3.28 x 10 6 photons mm -2 sec -1 at a distance of 0.75 m from the focal spot. What is the

The ampere has been defined (by the International Committee of Weights and Measures in 1946) as the current flowing in two long parallel wires 1 metre apart that produces a force o

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

Ask qu1. If the resistor Radj is adjusted to 175O what is the rotational speed of the motor at no-load conditions? 2. Assuming no armature reaction, what is the speed of the motor

Mention the categories of instruction and give two examples for each category The instructions of 8085 can be categorized into the following five Data transfer MOV Rd,Rs

Ask question #Minimum mechanism of microwave communication 100 words accepted#

What will I write in Inductor conclusion

Q. Using the small-signal equivalent circuit of a BJT with gm = 0.03 S, β = 75, and VA = 65 V, a load resistor RL is connected from the collector to the emitter, as shown in Figure