Dan Clement wrote on Feb 11th, 2010, 7:35pm:Thanks all.
Vivek, what I am really struggling to find is a practical example of a real life, RTL example, or even a block diagram implementation of a second order DAC.
The books are all about the math and yes that's important, but I have a hard time drawing a line between the high level theory and how to build it with RTL and logic gates.
I will check out all the references I've been provided and I will come back with specific questions if I can't get there.
thanks!
-Dan
P.S. to clarify i'm looking for help with a DAC not an ADC...
Dan,
I was also referring to DACs (note my mention of error-feedback structures). There are papers by Fujimori in the Dec. '98 (low-power, cheap audio DAC), and Aug. 2000 (high-performance audio DAC) in the JSSC. The reason for mentioning ADCs was simply that the math applies equally well to ADCs as well as DACs.
That being said, the thing you are looking for is not easy to find anywhere. You would need to search for courses (maybe on some univ websites) or look for professional courses on delta-sigma DAC design or digital filter design. I cannot imagine that the techniques used are any different from that in most conventional digital design, particularly filter design. However, I have never had to make a delta-sigma DAC myself.
Finally, the yellow book (Schreier, Norsworthy, Temes) covers DACs in Chapters 10 and 12, and the green book by Schreier and Temes covers DACs in Chapters 7 and 9, with practical examples. Even Johns & Martin has some basic stuff about the subject.
Regards,
Vivek