I posted a similar question in the group but did not getthe answer.I wonder if there is a market for an A/D converter with very highdynamic range, say 150dB. I thought it might be useful because it caneliminate the needs for multiple-gain front end.By 150dB dynamic range I mean an A/D converter that can practicallymeasure a large signal as high as a few volts, and within the same timeperiod it can detect a signal as small as a few nano volts. To clarify,when I say "within the same time period", it does not necessarily meanat the exact same sample points.Say if we sample a frame of signal with 1024 points. The first a fewhundred points have magnitude as high as a few volts while the last afew hundred points can go as low as a few nano-volts. This is how Idefine the dynamic range.We do not talk about theoretical dynamic range. For a 24bit A/Dconverter, the theoretical dynamic range is 6.02 dB/bit * N bits =144dB. This definition is not very useful. We all know a 24bit A/Dusually has only 110dB dynamic range due to analog limitation.The question is: do you see a market or application for such kind ofA/D converter if somebody got the products?

(snip)So, why do you think your 150 dB dynamic range converter will not havethese same "analog limitations?"-a

Market for an A/D converter with 150dB dynamic range?

Oct 11, 2006 41 Replies

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Ancient_Hacker 19 years ago

we don't need any resistors, we used just two, only because our $2.49 meter doesnt go up to a billion volts.

And they don't have to be noiseless, if anything that would add a few microvolts to both our scenarios.

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Michael A. Terrell 19 years ago

How are you going to hook all those imaginary generators in series without radiation and ingression problems?

Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

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