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Design >> RF Design >> Big D, small A
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Message started by rajdeep on Feb 21^st, 2007, 7:01am

Title: Big D, small A
Post by rajdeep on Feb 21^st, 2007, 7:01am

Hi all,

This question is possibly not suitable for this forum, but I could not find any other appropriate forum.
Can anybody tell me about a predominantly digital circuit, where analog module is used in between to do some signal processing and again pass it to a digital cicruit?
I'm mainly interested to know how presence of an analog circuit in the path of a digital signal can affect the timing analysis of the total digital path. May be some high speed processors use this kind of technique!! But don't know about any such design technique where a digital signal is passed to an analog module and then passed it to another
digital module i.e an analog block(small) sitting in a digital path.

Please suggest any other kind of circuit that is close to what I'm asking, if such a circuit does not exist :-/

Rajdeep

Title: Re: Big D, small A
Post by Ken Kundert on Feb 21^st, 2007, 9:06am

That would be true if two large digital chips wanted to communicate at very high speeds. They would use a SerDes, which is partially analog. Examples of this abound in computers these days as wide busses are being converted to smaller sets of high-speed serial links. For more on this see www.designers-guide.org/Perspective/serial-comms.pdf.

-Ken