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Jonathan Harris

IMS 2014: Day 1 From an Applications Engineer Perspective

Jonathan Harris
jonharris0
jonharris0
6/30/2014 8:53:59 AM
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RE: Day 1 from an Applications Engineer Perspective.
Very good points.  It is definitely a benefit.  I enjoy talking with customers and letting them know about our products as well as hear about what they are working on.  It is also interesting to see students drop by who have such an interesting (and sometimes simplistic) view of the world.

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yalanand
yalanand
6/27/2014 6:55:09 AM
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Newbie
RE: Day 1 from an Applications Engineer Perspective.
Shows like these always benefit you as a worker because you not only get to showcase your projects, You get to meet new people who can educate you more on the kind of work you do as an engineer. For a student you can use this opportunity to go and learn good ideas and ways of helping you get a job after you graduate. You get to experience the work atmosphere.

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jonharris0
jonharris0
6/26/2014 3:11:13 PM
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Re:IMS 2014: Day 1 From an Applications Engineer Perspective
Thanks for the comments.  One of the advantages of GSPS ADCs is the reduction in required front end components.  Some designs may allow for this while others may not.  In some cases the converters on them market are interleaved actually.

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SunitaT0
SunitaT0
6/26/2014 5:38:23 AM
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Master
Re:IMS 2014: Day 1 From an Applications Engineer Perspective
Jonathan, thanks for sharing your experience. ADC offerings eliminates the need to interleave multiple A/D converters for the required performance along with reconfigurable platforms. Direct RF sampling and elimination of down conversion allow for more front-end configurations.

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samicksha
samicksha
6/26/2014 2:30:34 AM
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Artist
Re: Spectrum Analyzer
Yes I agree you completely, it can lead to a non-monotonic transfer function in a DAC.

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jonharris0
jonharris0
6/25/2014 8:27:51 AM
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Re: Spectrum Analyzer
I am not an expert on the design of the handheld spectrum analyzers, but from a high speed ADC standpoint, most COTS ADCs today do not typically have missing codes.  A tell-tale sign though is if the DNL is greater than 1 LSB, the converter would have missing codes. 

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samicksha
samicksha
6/25/2014 1:59:42 AM
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Artist
Spectrum Analyzer
When we talk of Handheld  spectrum analyzers they tend to offer a limited capability, wherein chances of codes getting missed out is higher, curious to see if this ADC can help in improving the device.

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More Blogs from Jonathan Harris
We will continue looking at the AD9680 as an example just as we did in part 1. Similar to the real mode operation of the DDC the normalized decimation filter responses are the same regardless of speed grade.
Let’s now take a closer look at the decimation filtering and how ADC aliasing influences the effective response of the decimation filtering
Increase the decimation ratio in the DDC to see the effects of frequency folding and translating when a higher decimation rate is employed along with frequency tuning with the NCO.
Let’s now take a look at a real example with the AD9680-500. We’ll see how this simple yet powerful tool can be used to aid in understanding the aliasing effects of an ADC as well as help with understanding effects of some digital processing blocks in the AD9680.
Back in my April blog post this year, we took some time to look at the Frequency Folding Tool that is available on the Analog Devices web site. I would like to revisit this tool as there have been a few handy improvements that have been made based on some great feedback.
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