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Design >> Mixed-Signal Design >> design of continuous-time delta-sigma converters
https://designers-guide.org/forum/YaBB.pl?num=1150453412

Message started by vivkr on Jun 16^th, 2006, 3:23am

Title: design of continuous-time delta-sigma converters
Post by vivkr on Jun 16^th, 2006, 3:23am

Hi,

I would like to know how one goes about designing a continuous-time delta-sigma modulator. Most information on this topic is focussed on discrete-time modulators, and the MATLAB utilities available do the same. They also suggest mapping a discrete-time modulator to a continuous-time one with the use of preflitering.

However, I could not find a specs to filter design strategy. Perhaps someone can suggest a reference.

I would also like to know if there are any advantages/disadvantages of specific filter schemes (Ladder/Biquad Cascade/...) in the context of delta-sigma converter design. The tradeoffs in terms of normal filter design are clear to me.

Thanks
Vivek

Title: Re: design of continuous-time delta-sigma converte
Post by RobG on Jul 5^th, 2006, 12:50pm

Vivkr.... if you haven't already, try to get your hands on the 2004 CICC Educational Sessions Workbook. Kathleen Phillips gives a tutorial on CT DSM that may be helpful. That isn't the only year she did it, but it is the one I have on hand.

Title: Re: design of continuous-time delta-sigma converte
Post by vivkr on Jul 10^th, 2006, 2:39am

Hi Rob,

I will try to get my hands on that workbook, although I think it will be a bit hard.

By the way, what a coincidence that Kathleen Philips works for Philips Semiconductors...

Regards
Vivek