From Doctor to Docent a Personal Reflection Jonny Johansson About - - PowerPoint PPT Presentation

From Doctor to Docent

a Personal Reflection

Jonny Johansson

About this presentation

• My path to the docentship – a 7 year journey
• All but a straight line
• Memory is selective
• Hindsight view on events, people, and work that have been

important in achieving the the docentship

• Timeline is the base

– End of 2004 until today

• A mix of research and other activities

– More or less connected to actually becoming a Docent

The timeline - selected important events

CV effect 04 06 05 07 08 09 10 Year 11

Research Other valuable knowledge

+ +

The timeline - selected important events

CV effect 04 06 05 07 08 09 10 Year 11

Research Other valuable knowledge

+ +

The end is the beginning

• Thesis defence Nov. 25,

2004

• Agreement to continue
• Enourmous feeling of relief
• Planning for docentship? -

nope...

• Money? - Not my

problem....

• A little bit naive? - Yes....
• Papers?

– 2 journals, 6 conferences

What was in the thesis?

• Quite diverse
• Ultrasonics

– Modelling in Spice togeher with electronics

• ASIC design

– US driver and receive chip – A/D converter

• System design

– ASIC mounted on US device – The Mulle Embedded platform

The timeline - selected important events

CV effect 04 06 05 07 08 09 10 Year 11

Research Other valuable knowledge

+ +

The continuation…

• 2005 quite vague
• Employed as Foass
• Teaching, attempting research

– Unfocused on reasearch, teaching my foundation

• No solid plan which path to take research wise

– Idea to work with electronics for ultrasonics

• In hindsight, three major events:

– Assistant supervisor for Kirill Kozmin – Eiscat 3D project initiated - Gustav Johansson employed – Strategic money from EISLAB - Johan Borg to work with the thumb size ultrasonic transducer

• All of these thanks to the driving force of Prof. Jerker Delsing

The timeline - selected important events

CV effect 04 06 05 07 08 09 10 Year 11

Research Other valuable knowledge

+ +

Teaching

• Obviously, in the University, a core activity

– Development and teaching of courses – In my case, basic and advanced electronics

• The students are our future (”plattityd”, men sant)

– Meeting and interacting with the students give me energy – Facilitating learning is the key

• Mutual appreciation

– Adelie price 2004, Studentkårens pris 2009

• Does count in the CV

– Keep documentation and course evaluations!

The timeline - selected important events

CV effect 04 06 05 07 08 09 10 Year 11

Research Other valuable knowledge

+ +

The level crossing A/D converter

• The signal is sampled at the

moments when it crosses threshold level

• The time intervals between

samples is measured

• High SNR with few

comparators

• Activity dependent power

consumption

• No aliasing
• Two critical components

– Comparator & Timer

Contributions to the area

• System analysis

– Structured design approach, considering multiple effects – Comparator:

– Propagation delay stability, Offset, Input related noise,Output jitter

– Timer:

– Resolution, Linearity, Jitter

• Comparator optimization

– Minimize delay variations – Increase preamplifier bandwidth – Redistribute gain and bandwidth between preamplifier gain stages – Neutralization capacitors

Important journal publications

• First efforts at well ranked Journals

– Valuable input from Prof. Juha Kostamovaara:

• Level-crossing ADC performance evaluation toward

ultrasound application.

– Kozmin, Kirill ; Johansson, Jonny ; Delsing, Jerker. I: IEEE Transactions

• n Circuits and Systems Part 1: Regular Papers. 2009
• A low propagation delay dispersion comparator for a level-

crossing AD converter.

– Kozmin, Kirill ; Johansson, Jonny ; Kostamovaara, Juha. I: Analog Integrated Circuits and Signal Processing. 2010 ”- Tell them what you are going to say, say it, then tell them what you told them”

The timeline - selected important events

CV effect 04 06 05 07 08 09 10 Year 11

Research Other valuable knowledge

+ +

Widening responsibilities

• Great experience or administrative boredom?

– Depends on who you ask – Learning and understanding the system (avoiding the ”we” vs ”them” effect…) – Part of an academic career

• Setting up the Y program

– Teknisk fysik och elektroteknik - merging two programs – Negotiations over department limits – Making new friends (and not so good friends) – Great insight in educational planning, maze of restrictions

Leadership matters...

• Assisting EISLAB head of division

– Working close to Jan van Deventer – Handling of staff matters, development talks, planning etc

• Utbildningsledare (UL, HUL)

– Deep understanding of the system in educational matters – Good connections to the ”B house” – Everything from unhappy students to strategic planning

• Utbildningskoordinator (UK)

– Brief sejour working for TFN – Insight in TFN matters

The timeline - selected important events

CV effect 04 06 05 07 08 09 10 Year 11

Research Other valuable knowledge

+ +

Eiscat 3D – the next generation incoherent scatter radar

• Tool for atmospheric research

– Electrons, ions, plasma

• Multi-static in the polar region
• Huge arrays with direct

sampling receivers

• LTU responsibilities

– Receiver front end – Timing – Beam forming

• Stringent timing demands

– 100 – 150 ps

Contributions to Eiscat 3D

• Digital beamforming

– Simulation tool – Requirements and filter design

• Timing

– GNSS based system proposed

• Practical tests performed

– Cable based calibration system

• Signal injection at each front end
• Sub 20 ps accuracy
• Amplitude measurement 0,08%

– Error detection using PCA

• Major efforts also by Johan B &

Mikael L.

Key journal papers from EISCAT 3D

• Simulation of post-ADC digital beamforming for large aperture array radars

– Johansson, G., Borg, J., Johansson, J., Lundberg Nordenvaad, M. & Wannberg, G. 2010 i : Radio Science

• Picosecond level error detection using PCA in the hardware timing systems

for the EISCAT_3D LAAR

– Johansson, G., Hägglund, F., Carlson, J. E. & Johansson, J. 2010 i : Radio Science Bulletin

• EISCAT_3D - a next-generation European radar system for upper

atmosphere and geospace research

– Wannberg, G., Andersson, H., Behlke, R., Belyey, V., Bergqvist, P., Borg, J., Brekke, A., Delsing, J., Eliasson, L., Finch, I., Grydeland, T., Gustavsson, B., Häggström, I., Harrison, R., Iinatti, T., Johansson, G., Johansson, J., Johansson, J., La Hoz, C., Laakso, T., Larsen, R., Larsmark, M., Lindgren, T., Lundberg Nordenvaad, M., Markkanen, J., Marttala, I., McCrea, I., McKay, D., Postila, M., Puccio, W., Renkwitz, T., Turunen, E., van Eyken, A., Vanhainen, L., Westman, A. & Wolf, I. 2010 i : Radio Science Bulletin

The timeline - selected important events

CV effect 04 06 05 07 08 09 10 Year 11

Research Other valuable knowledge

+ +

What about entrepreneurship?

• Listed in the CV instructions
• ”Life on the other side”

– Doing it by yourself – Being an administrator helps… in this world also

• The support structure is there, however

– LTU Innovation, Centek, ABI ……. – Fabulous support from division, department, colleagues

• Eistec AB

– Manufacturing and developing Embedded Systems (the Mulle) – Slowly becoming an entity of its own – At present housed in ABI; CEO + one engineer

The timeline - selected important events

CV effect 04 06 05 07 08 09 10 Year 11

Research Other valuable knowledge

+ +

Airborne distractions….

• ATPL (Airline Transport Pilot Theory)

– TFHS, Ljunbyhed, Lund University – 60 hp over one year, meetings once a month – Really thick pile of books….

• Planning of cooperation TFHS – LTU –

Arvidsjaur

– New connections gave new ideas – Pilot training with engineering on University level – Utilizing knowledge in program planning and ”manouevering the system” – Stop at ”Yrkeshögskolor”

Approaching the flight line

• Teaching at TFHS

– ”Rented out” to TFHS to teach Navigation in 2008 – 2-3 days every 2-3 weeks in Ljungbyhed – For me; an experience for life – A mix of two burecracies; Aviation and

• Education. Try that one…
• Getting the CPL

– Two intense weeks at Backamo, summer

• f 2010

– 25 flight training hours in nine days - Whooaaa ;-)

• So, then what?

– Flight Instructor is logical, combines teaching and flying – Another investment in time and money

The Pushers and the Pushee…

• A couple of statements that stuck

– ”Go write a paper!” – ”When are YOU submitting YOUR docent application?”

• Pushing has effects, you just don’t know beforehand which…

– Even though well meant, it can be double sided – It creates an awareness of expectations – It can create anger and irritation

Once (1994) when working 6 months for ABB in Raleigh, N.C., USA, I jokingly complained to my boss, ”- Don’t push me!” whereby he responded: ”- I’m supposed to do that, I’m the Pusher and you’re the Pushee!”.

The timeline - selected important events

CV effect 04 06 05 07 08 09 10 Year 11

Research Other valuable knowledge

+ +

ASIC design I (II)

• Ultrasonic transducer interface IC
• Up to 40 V p-p, 400 mA max
• 150 MHz sampling frequency
• High precision timing and current
• On chip calibration DAC

ASIC design II (II)

• Charge Coupled Devices – CCD
• Can de used as analog memory
• Idea: Capture high speed signals

for subsequent AD conversion

• Major contributions

– Design of CCDs in standard CMOS – Thorough evaluation of performance – Separation of effects that influence performance

Another pair of good journal publications…

• An ultrasonic transducer interface IC with integrated push-pull

40 Vpp, 400 mA current output, 8-bit DAC and integrated HV multiplexer

– Borg, J. & Johansson, J. 2011 i : IEEE Journal of Solid State Circuits

• Evaluation of a surface-channel CCD manufactured in a

pinned active-pixel-sensor CMOS process

– Borg, J. & Johansson, J. 2011 i : IEEE Transactions on Electron Devices

Some almost conclusive comments

• What’s the sum of papers after defense?

– Counting in PURE, it adds up to 8 journals and some 23 conferences (actually one of the journals is in my name.. ;-)

• What was MY main contributions otherwise, you may ask?

– Encouraging, pushing & pulling towards the goal – By understanding, being able to make it understandable – On and off, adding some little twist…..

• Working WITH the system is easier than AGAINST
• What do I need to improve?

– Own research and funding necessary to move towards Professor

It’s all about people…

Thank you to all of you who have been with me during the journey!!