Analog signal to Digtal system

Status
Not open for further replies.
R

roddyalan

Junior Member level 1
Joined
May 15, 2009
Messages
16
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,407
Hey guys,

What would happen to an analog signal being supplied to a digital system.

Like say for eg. I supply a +3V to -3V analog signal to a FPGA which can take inputs of 3V.

This Q has been bugging me for days and will help me sort out some of my digital problems.

Thanks
 

The negative 3 V will be a problem; clamp the input with a suitable diode.
The FPGA will "read" the input voltage of more than 2.3 V as a binary 1 and less than 2.2 V as a zero
 

    R

    roddyalan

    Points: 2
    Helpful Answer Positive Rating
Thanks for the response. I was asking hypothetically.

So, are you saying that if I'm looking to make the positive analog signal into a one bit digital signal, with a really bad transition "area", i don't need an adc.

What happens if the analog signal is at 4V, but the input max voltage is 3V

Also, will the negative part just get clipped, and/or will it cause any other problems.

Regards
AR
 

It depends on the reverse breakdown voltage of the Transistors in the FPGA
 

 

    R

    roddyalan

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…