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

about overcurrent(short circuit) protection circuit

Status
Not open for further replies.
T

tiger_ads

Member level 3
Joined
Jun 17, 2005
Messages
56
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,946
about overcurrent

Could someone give me some advices for how to design a overcurrent(or short circuit) protection circuit for power amplifier IC's output stage. I use the pseudo source follower output stage.
Reference: "A High-Performance CMOS Power Amplifier" John A. Fisher
"Class-AB High-swing CMOS Power Amplifier" F.Mistlberger and R.Koch

Could you give some advices or references or diagrams?

Thanks in advance!
 

you can check some regulator or DC-DC design circuit. Normally you mirror the output stage current to a resistor, this resistor will connected to a bipolar, when overcurrent is big, the voltage across resistor will be big, which will turn on bipolar and get a logic indicate.
 

Thanks a lot!

Could you give me some reference paper, only the title is ok
thanks

Sencondly, mirrored the output stage current is a good way, but it will source a constant current during normal operation state, it waste power consumption. Any other ideas? thanks
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top