Maker Pro
Maker Pro

regarding opto isolator

P

prav

Jan 1, 1970
0
Hi all,

I was studying some board schematics. In this there are some clocks
coming from external world . Before these clocks are connected to the
FPGA pins they pass through an opto isolator.Could any body help me
out why the opto isolators are really required .

rgds,
prav
 
J

Jamie

Jan 1, 1970
0
protection,
and convenience of use over some of the older
methods for controlling high volt functions with low voltage
sensitive components.
 
C

Chaos Master

Jan 1, 1970
0
prav called The Usenet Police (tm) of sci.electronics.basics and said to the cops,
at 11 Feb 2004 22:04:41 -0800:
Hi all,

I was studying some board schematics. In this there are some clocks
coming from external world . Before these clocks are connected to the
FPGA pins they pass through an opto isolator.Could any body help me
out why the opto isolators are really required .

For protection. A little spike can turn the FPGA into toast, and replacing it will
be not fun (consider a FPGA of 144 pins).
 
Top