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

Problem with power supply with two floating outputs

Status
Not open for further replies.
W

wossy

Junior Member level 2
Junior Member level 2
Joined
Jul 2, 2003
Messages
21
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
153
Power Supply

Hello

I am developing a power supply with two floating outputs. Each output is opto isolated from a control board. The pcbs are in a metal case. My problem is that when I use a scope, connecting the ground lead causes a glitch on my ground causing the opto to switch. Any ideas how to stop this.

Thanks
 

Re: Power Supply

If you leave the two output "totally" floating you will always have this problem.
Try to connect a RC tank consisting of 4.7-10MΩ resistor and 4.7-10nF capacitor between grounds .. this should equalize potentials of circuits ..
After tests you can remove them and have the outputs floating again ..
 

Re: Power Supply

add a cap to decouple it
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top