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

multiple channel "DC OK" signal ANDing with galvanic isolation

Velkarn

Full Member level 2
Joined
Feb 17, 2014
Messages
140
Helped
74
Reputation
148
Reaction score
72
Trophy points
28
Activity points
669
hi!

i have 10 DC OK galvanic isolated signals and need to AND them into one signal.
if i connect outputs of 10 optocoupler in series and than detect by comparator when all of it is on, is it good shem?
 

asdf44

Advanced Member level 4
Joined
Feb 15, 2014
Messages
1,006
Helped
353
Reputation
706
Reaction score
346
Trophy points
83
Activity points
8,410
You could do that.

But Much better (cheaper/smaller) to AND all the signals with a couple multi-input compact gates and then send the result through a single opto.
 

BradtheRad

Super Moderator
Staff member
Joined
Apr 1, 2011
Messages
13,477
Helped
2,667
Reputation
5,330
Reaction score
2,575
Trophy points
1,393
Location
Minneapolis, Minnesota, USA
Activity points
100,772
Diode logic can be used as long as your range of voltage is such that one low vote affects the resultant signal causing it to be pulled low.
It can be done with 10 diodes and one pullup resistor.
 

Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top