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

0~-3V adj negative supply

Status
Not open for further replies.
7

7rots51

Advanced Member level 4
Joined
May 17, 2002
Messages
1,183
Helped
25
Reputation
50
Reaction score
12
Trophy points
1,318
Activity points
9,636
I want to make 0~-3V from -12V and +12V ,and when there is no +12V supply (not applied) the output becomes -1.5V,do you have any idea to help me?
Is there any IC for this task?
 

this is a different case,I want it to be linear mode and to be produced with negative supply -12VDC.
Is there a negative Adj reg starting from zero?
 

7rots51 said:
this is a different case,I want it to be linear mode and to be produced with negative supply -12VDC.
Is there a negative Adj reg starting from zero?
Click to expand...
Your case is not realy that different.

What you need aditional, is an voltage divider and a voltage follower. It's easy to construct one that delivers from 0 to -3 volts using simple voltage dividers.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top