Photolitics

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Photons Hit Electrons

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Recent Pole-Zero Pairs

▨ Not deserted - temporarily stranded

▨ Analog-style digital design observations

▨ The semiconductor industry in Bulgaria Vol. 2

▨ Small-signal and large-signal MOSFET channel resistance

▨ Bricks and mortar of the internet

▨ Harvesting gamma radiation

▨ Dominant gate capacitance of a MOSFET

▨ Mr. Sievert, a fictional character

▨ "This could be a very strong paper"

▨ Major milestone: Oxford thesis submission

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Tweets by @DeyanLevski

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Deep N-Well

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Buy me a coffee

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Electronic Literature

Here is a list with some publications and reports which I have been involved with in the past.

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Academic Publications

I have lost count, please check my Google Scholar for a more up to date list of publications...

Deyan Levski, Martin Waeny and Bhaskar Choubey, "A 1-us Ramp Time 12-bit Column-Parallel Flash TDC-Interpolated Single-Slope ADC with Digital Delay-Element Calibration", IEEE Transasctions on Circuits and Systems I: Regular Papers, Vol. PP, Issue: 99

Deyan Levski, Martin Waeny and Bhaskar Choubey, "A 12-bit Column-Parallel Flash TDC-Interpolated Ramp ADC with Online Digital Delay Element Correction", International Image Sensors Workshiop 2017

Deyan Levski, Martin Waeny and Bhaskar Choubey, "A 12-bit Column-Parallel Flash TDC-Interpolated Ramp ADC with Online Digital Delay Element Correction", International Image Sensors Workshiop 2017 - slides

Deyan Levski, Bhaskar Choubey, "A Conceptual 12-bit Column-Parallel Time-Domain Binary Search TDC-Interpolated Single-Slope ADC Architecture", Oxford Circuits and Systems Conference, 2017, Oxford UK - poster

Deyan Levski, Martin Waeny and Bhaskar Choubey, "Ramp Noise Projection in CMOS Image Sensor Single-Slope ADCs", IEEE Transactions on Circuits and Systems I: Regular Papers

Deyan Levski and Bhaskar Choubey, "On noise in time-delay integration CMOS image sensors", Proc. SPIE 9891, Silicon Photonics and Photonic Integrated Circuits V, 989122 (May 13, 2016); doi:10.1117/12.2227320;

Deyan Levski, Tsvetomir Gotsov, Kamen Krastev, Aneliya Manukova, "Embedded Automatic Weather Station", Elektronika Magazine, Sigma-Not ISSN: 0033-2089

Theses

Investigations of Time-Interpolated Single-Slope Analog-to-Digital Converters for CMOS Image Sensors - DPhil Thesis, University of Oxford

A Cyclic Analog to Digital Converter for CMOS image sensors - MSc Thesis, Linköping University, ISRN: LiTH-ISY-EX--13/4674--SE; link to pdf.

Embedded TCP/IP Server for Automated Acquisition of Meteorological Data - BSc Thesis, University of Ruse

Other

An introduction to ADCs for CMOS image sensors - seminar at the Open University, Milton Keynes, UK

Worst case resistor mismatch in an R-2R ladder DAC. Some basics.

Interpolation and Oversampling in Data Converters. Basic Trade-offs.

How does my computer work?, intro to CPUs for high-school students at Mathematics High-school, Ruse (in bulgarian)

CMOS integrated circuits and mixed-signal design, seminar at the 2015 Applied Electronics Forum, University of Ruse, (in bulgarian)

Music through the LPT port, practical lab notes for the 2015 Applied Electronics Forum, University of Ruse, (in bulgarian)

A Sparse Booth Encoding Technique

A Sparse Booth Encoding Technique - slides

Radix-4 Booth Encoded Multiplier

Web publication on the Automatic Weather Station

Image sensors - from the dinosaur age till the recent years (in Bulgarian)

Some solved problems on basic semiconductor theory

Some solved problems on basic PN junctions

Some solved problems on BJT and FET transistors

Some solved problems on basic Optoelectronic devices

The gm/id method for transistor sizing, simple notes

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