Re: [Discuss-gnuradio] DC component and daughter-boards

[Robitaille, Michael]

In the post:

http://lists.gnu.org/archive/html/discuss-gnuradio/2005-04/msg00303.html
<http://lists.gnu.org/archive/html/discuss-gnuradio/2005-04/msg00303.html> 

 

Matt indicates that "Feed your signal to the + input, and send the reference
voltage
(Vdd/2, 1.65V, available on the board) to the - input.  The problem here
is that the ADC expects the signals to be +/- 1V from the reference,

1.65V.  Your signal will need to be properly biased."

 

Is this a +1.65V you feed to the -input (negative)?

 

Why does the negative input require a positive voltage bias?

 

Mike