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

What device size/bias can make a MOS/BJT more linear?

Status
Not open for further replies.
R

_RFIC_

Junior Member level 1
Joined
May 25, 2005
Messages
16
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,281
Activity points
1,409
mos veff

For fix current:

1. higher current density?
2. larger device size lower current density?
3. higher Vgs less Vds?

how to test setup to fairly compare the linearity of a device?
 

For MOS devices:

At fixed bias current, decreasing W/L increases linearity. Simply because for a MOS differential pair decreasing the overdrive voltage (Veff) increases linearity. Note that to obtain the limit of this linearity, the bias points should be carefully adjusted to prevent, for example, turning off the tail current source.
 

Resistive oder inductive degeneration!

If the amp is in A-mode and have bias current I which component gives the most straight line as load curve between the maximum current 2*I and the maximum voltage.: "a resistor, or inductor at specific frequency"

The inductor is w/o noise :)
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top