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Jonathan Harris
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ADI Standard Space Products Screening: Beyond Group A Testing
Jonathan Harris  
1/18/2019   Post a comment
The steps we will look closely at are the fine leak and gross leak seal tests, external visual, and radiation latch-up tests
A Sampling of Radiation Test Facilities
Jonathan Harris  
12/20/2018   4 comments
Facilities for radiation testing at facilities that are located in the United States
A Time of Giving Thanks
Jonathan Harris  
11/21/2018   Post a comment
It is imperative to understand how a device or system will respond when subjected to radiation so that its operation in the harsh, radiation-rich environment of space can be predicted.
ADI Standard Space Products Screening: Group A Testing
Jonathan Harris  
10/17/2018   Post a comment
There are many screening steps performed on space qualified components. In this installment we will pick up at step 18 with Group A screening.
ADI Standard Space Products Screening
Jonathan Harris  
9/27/2018   Post a comment
Space screening for the standard space product offerings which include products such as ADCs, DACs, comparators, amplifiers, voltage references, switches, isolators, regulators, and attenuators
Space Mission Lifetimes
Jonathan Harris  
8/18/2018   Post a comment
Designs for space applications are commonly created with mission life expectations reaching 15 to 20 years and even longer in some cases
Why All This Stringent Testing?
Jonathan Harris  
7/26/2018   2 comments
I’d like to take a step back from the details and specifics related to radiation testing and focus a bit on some of the reasons that advanced testing and screening is performed on space qualified products.
Single Event Effects (SEEs) with High Speed ADCs: Single Event Upset (SEU)
Jonathan Harris  
6/22/2018   Post a comment
Technically an SET could also be considered as an SEU for a high speed ADC since it is likely that an ion strike could cause an SEU that results in a transient event that we would call an SET.
Single Event Effects (SEEs) with High Speed ADCs: Single Event Transient (SET), Part 2
Jonathan Harris  
5/27/2018   1 comment
I’d like to take a little more time to look at SETs. There are a few more points that I’d like to cover on the topic before we move on to SEUs.
Single Event Effects (SEEs) with High Speed ADCs: Single Event Transient (SET)
Jonathan Harris  
4/21/2018   3 comments
Now let’s move to our next SEE topic which is single event transients (SETs)
Single Event Effects (SEEs) with High Speed ADCs: Single Event Latch-up (SEL)
Jonathan Harris  
3/23/2018   Post a comment
In this installment we will look at single event latch-up (SEL) in particular for high speed ADCs.
Total Ionizing Dose (TID) Effects with High Speed ADCs
Jonathan Harris  
2/22/2018   Post a comment
Looking at TID effects
A Quick Overview of Radiation Effects - Single Event Effects
Jonathan Harris  
1/25/2018   Post a comment
The focus of this blog series will be more on the non-permanent single event effects (SEE) of radiation.
A Quick Overview of Radiation Effects
Jonathan Harris  
12/21/2017   Post a comment
While brainstorming on topics to write about this month it occurred to me to combine the two areas in which I’ve worked and talk a bit about a few types of radiation effects on high speed ADCs.
Load Regulation Measurement Coding in Python
Jonathan Harris  
11/26/2017   2 comments
In the spirit of continual learning and, as a follow on to my previous blog, I thought I would continue discussing coding for measurements by providing an overview of my Python script for load regulation.
Line Regulation Measurement Coding in Python
Jonathan Harris  
10/19/2017   Post a comment
I would like to take a few moments to give folks some insight into some of the coding that I did when measuring LDO line regulation
Pulling an All-Nighter
Jonathan Harris  
9/13/2017   4 comments
Do you recall those days in college when a project or assignment was due and you had to pull an all-nighter to get it finished by the due date?
Learning Is Not Just for New Engineers
Jonathan Harris  
8/9/2017   5 comments
A Look Back at Two Weeks of FIRST
Jonathan Harris  
5/15/2017   Post a comment
Experience is Quite a Teacher
Jonathan Harris  
3/20/2017   3 comments
How About Murphy’s Law?
Jonathan Harris  
1/23/2017   Post a comment
Lit Up Like a Christmas Tree
Jonathan Harris  
12/29/2016   5 comments
Measuring LDO Load Regulation for a Novice
Jonathan Harris  
11/22/2016   Post a comment
In this installment of this series I’ll explain how to collect load regulation for an LDO.
Measuring LDO Line Regulation for a Novice
Jonathan Harris  
10/28/2016   Post a comment
A device going into space must be much more rigorously evaluated than a device going into a commercial product. Hence the need to do a good deal more characterization and ‘proving out’ of the device to make sure that it will endure the harsh environment in space as well as the long lifetimes required.
Measuring LDO Power Supply Rejection Ratio for a Novice
Jonathan Harris  
9/25/2016   2 comments
As somewhat of a continuation of my last blog topic I am once again returning to measurement of an LDO parameter as I look at the power supply rejection ratio (PSRR) of this device
Measuring LDO Noise Spectral Density for a Novice
Jonathan Harris  
8/25/2016   Post a comment
Characterize the noise spectral density (NSD) of an LDO, otherwise known as a low dropout voltage regulator.
Virtual Eval Through the Eyes of an ADC, Part 2
Jonathan Harris  
7/15/2016   Post a comment
Now that we’ve had a chance to learn a bit about the tool we will take a look at using Virtual Eval to predict the performance of the AD9680-500 which has integrated digital downconverters (DDCs) and will compare simulated data to measured data.
Virtual Eval Through the Eyes of an ADC
Jonathan Harris  
6/21/2016   2 comments
As I mentioned in my last blog I would like to take some time in this blog to introduce you to the new online simulator tool offered by Analog Devices called Virtual Eval.
IMS2016: Day 3 Review
Jonathan Harris  
5/27/2016   Post a comment
The IMS2016 IMS show has come to a close on its third and final day.
IMS2016: Day 2 Review
Jonathan Harris  
5/26/2016   Post a comment
. The day started off just a little slower than yesterday but quickly picked up pace and resulted in another day of steady booth and floor traffic. I had some great questions about the products we are displaying in my demonstration as well as many questions on our other technology on display at the IMS show.
IMS2016: Day 1 Review
Jonathan Harris  
5/25/2016   Post a comment
I hope that you had a chance to visit the IMS2016 show during the first day. There was a noticeable increase in floor and booth traffic compared to the show last year. Perhaps you all read my preview blog this week and decided to come and check out our great demonstrations at the Analog Devices booth!
IMS2016: Preview and Preparation
Jonathan Harris  
5/23/2016   Post a comment
Let’s discuss the preparation for IMS2016 and preview the show a bit.
ADC Digital Downconverter: A Complex Decimation Example Revisited
Jonathan Harris  
5/6/2016   Post a comment
In this installment I’d like to revisit the example that was covered in my January blog post
ADC Digital Downconverter: Decimation Filters and ADC Aliasing, Part 2
Jonathan Harris  
3/15/2016   4 comments
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.
ADC Digital Downconverter: Decimation Filters and ADC Aliasing, Part 1
Jonathan Harris  
2/19/2016   2 comments
Let’s now take a closer look at the decimation filtering and how ADC aliasing influences the effective response of the decimation filtering
ADC Digital Downconverter: A Complex Decimation Example
Jonathan Harris  
1/15/2016   6 comments
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.
Analog Devices Design Tools: Frequency Folding Tool, A ‘Complex’ Example
Jonathan Harris  
12/9/2015   Post a comment
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.
Analog Devices Design Tools: Frequency Folding Tool Revisited
Jonathan Harris  
11/1/2015   Post a comment
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.
Analog Devices Design Tools: ADIsimRF Part 3
Jonathan Harris  
9/24/2015   2 comments
The ADIsimRF tool has many different calculation possibilities which are very nice to have on the hand. These can be useful when either in the lab collecting data or when working on a report in your office. The tool outputs are great to double check experimental results or to set expectations when about to take data.
Analog Devices Design Tools: ADIsimRF Part 2
Jonathan Harris  
8/18/2015   Post a comment
Before looking into the signal chain portion of the tool we began by looking at the calculator tool available in ADIsimRF.
Analog Devices Design Tools: ADIsimRF Part 1
Jonathan Harris  
7/19/2015   10 comments
The topic of this blog came up while at the IMS show and one of my colleagues mentioned that I should discuss the ADIsimRF tool as a part of the series. I thought this was a marvelous idea. I’ll have to precursor this discussion with the fact that I am actually an RF guy from my previous employment at an RF company which was my first position when I graduated from college.
IMS2015 Demo Details
Jonathan Harris  
6/3/2015   Post a comment
One of the questions that appeared on one of the IMS blog posts was about the details of the demonstration I had set up at the Analog Devices booth.
IMS2015 – Day 3: The Final and Shortest Day
Jonathan Harris  
5/22/2015   Post a comment
The last and final day of the show is usually has the most relaxed atmosphere and this year that proved to be the case once again. It is the shortest day of the show lasting from just 9:00 AM to 3:00 PM.
IMS2015 – Day 2: The Long Day
Jonathan Harris  
5/21/2015   2 comments
After having a pretty good first day of the show, I was looking forward to a good second day and it did not disappoint. The second day of the show on Wednesday is the longest day of the show as the exhibit hours go from 9:00 AM until 6:00 PM (day one is 9:00 AM to 5:00 PM and day three is 9:00 AM to 3:00 PM).
IMS2015 – Demo Setup and the First Day
Jonathan Harris  
5/21/2015   4 comments
The IMS2015 show is already off to a great start here in sunny Phoenix, Arizona and I hope that those of you attending are enjoying it so far.
IMS2015 – Pre-Show: The Preparation
Jonathan Harris  
5/18/2015   Post a comment
It sure doesn’t seem like it has already been a year since IMS2014! Well, technically, it hasn’t been since IMS2014 was in June last year. Once again this year IMS (International Microwave Symposium) is in a state known for its sunshine albeit this time sans the humidity. This year the show visits sunny Phoenix, Arizona.
Analog Devices Design Tools: ADISimADC Frequency Folding Tool
Jonathan Harris  
4/23/2015   2 comments
After looking at the performance metrics in the online ADC simulator tool it is a great time to look at another online ADC tool called the Frequency Folding Tool. It is a useful simulator that helps to understand the effects of aliasing in an ADC.
Analog Devices Design Tools: ADISimADC Performance Metrics
Jonathan Harris  
3/27/2015   1 comment
. I received a very good reader question from my last blog post regarding the various parameters that are reported by the tool. Let’s take a look at an example and explore the parameters that are returned. In this example we will look at the AD9643-250.
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