Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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

bias circuit scheme IC containing number of bias voltages

Status
Not open for further replies.

engrvip

Full Member level 2
Joined
May 3, 2006
Messages
143
Helped
3
Reputation
6
Reaction score
0
Trophy points
1,296
Activity points
2,374
can someone suggest me some scheme to implement in a big circuit which requires lot of bias voltages that can be generated from one main bias source which is independent with temperature adn variations????
 

ambreesh

Full Member level 5
Joined
Feb 21, 2005
Messages
319
Helped
21
Reputation
42
Reaction score
4
Trophy points
1,298
Activity points
4,347
Re: bias circuit scheme IC containing number of bias voltage

i would suggest that you have biasing current rather than biasing voltages.
Use a simple constant-gm circuit to generate biasing currents.
take these current anywhere in the chip and generate the biasing voltages locally.
Global biasing is always through current and local biasing is through voltage
 

engrvip

Full Member level 2
Joined
May 3, 2006
Messages
143
Helped
3
Reputation
6
Reaction score
0
Trophy points
1,296
Activity points
2,374
Re: bias circuit scheme IC containing number of bias voltage

And how to generate bias voltage from those biasing currents ...should some i to V converter be used or just pass that current to some resistor locally where bias voltage is needed.
 

ambreesh

Full Member level 5
Joined
Feb 21, 2005
Messages
319
Helped
21
Reputation
42
Reaction score
4
Trophy points
1,298
Activity points
4,347
Re: bias circuit scheme IC containing number of bias voltage

Pass the cyrrent through a diode connected PMOS or NMOS depending on if you have a current source or a current sink in your constant-gm circuit.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top