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.

negative gate bias - how to implement?

Status
Not open for further replies.

bouchy

Advanced Member level 4
Full Member level 1
Joined
Jul 11, 2004
Messages
113
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,296
Location
USA
Activity points
794
negative gate bias

Hi all,
I would like to seek your help in figuring out how to turn on and off my negative (-10v) supply using a positive logic signal (+3.3V to 0V).
Thank you
 

negative gate bias

Hi,
You need a transistor between GND & Minus parts with control-input (base), than apply some voltage shift between your logic output and ithe control-in: >> it should function...
K.
 

    bouchy

    Points: 2
    Helpful Answer Positive Rating
Re: negative gate bias

If you have 2mA of digital high side drive then this
ought to work for you:
 

    bouchy

    Points: 2
    Helpful Answer Positive Rating
Thanks a lot guys. can you please explain how this circuit work?
Thanks again
 

Hi,
Becouse base is on GND & if the cotrol out is zero= your transistor can not open, it has no B-E current; on the FETs Gate is-10V.
others is the Tr. oened if base-emitetr hase trough the 3V/1K a control current & makes the FETs status change...
K.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top