Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Body Effect in NMOS and the Drain Current

Status
Not open for further replies.
A

albus

Junior Member level 2
Joined
Dec 26, 2010
Messages
22
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,458
I was studying MOSFETs and as i was reading Microelectronic Circuits by Sedra & Smith, I saw the concept of body effect. Now the body effect and why it is happening is clear, but there is one thing I didn't understand. When Vsb is increased Vt also increases so far so good but why the hell does drain current increases when Vt increases? Shouldn't it decrease since the equation of the drain current is
Id.jpgId.jpg
 

you are right indeed, that's why the body effect is undesired, it reduces Ids and therefore the transconductance gm of the single transistor amplifier
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top