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Faster and better-quality data conversion for electronics systems

Interested in faster data rates and higher bandwidth in your next-generation electronic devices? Fancy having ultra-definition video and better voice-quality communications available in the palm of your hand? This is made possible via digital information processing and high speed data conversion.

Most of the information we send and receive in our everyday environment is analog by nature. The communication and measurement equipment we utilize tend to digitize wider and wider bandwidths of this analog information so that we can process the information using, for example, highly powerful and fast processors, like the ones found in our computers and smartphones. The analog-to-digital-converter (ADC) is an important center piece that converts the analog signal into a digital form.

We need faster and more accurate ADCs to be able to keep up with the demand for higher data rates and higher bandwidths. We have now reached a point where a single ADC is no longer able to keep up with this growing demand and we therefore need multiple ADCs working in parallel. This development is similar to the way we saw the single-core processor in our computers become dual-core and then quad-core to keep up with the demand for higher processing power and speed.

The challenge of using these parallel ADCs, which are commonly known as time-interleaved ADCs, is that the differences between the individual ADCs degrade the overall quality of the data conversion. We need to correct the differences between ADCs in order to achieve the high-speed data conversion performance we desire. In his doctoral dissertation, MSc Simran Singh has successfully developed and tested special methods for correcting the unwanted effects caused by the differences between the ADCs, enabling high-speed and high-performance data conversion.

The research work was carried out in tandem between TUT in Finland and Airbus Defence and Space in Germany. The specialized digital algorithms developed within the research work, aimed at enhancing the performance of data converters, have also received international attention and recognition at the IEEE International Solid-State Circuits Conference (ISSCC) data converter forums in 2015 and 2016. Annually held close to the heart of Silicon Valley, ISSCC is the foremost global forum for presenting the advances in solid-state circuits, showcasing cutting-edge developments of integrated circuits and systems-on-a-chip.

Public defence of a doctoral dissertation on Friday, 12 August 2016

MSc Simran Singh’s doctoral dissertation in the field of communications engineering entitled ‘Time-Interleaved Analog-to-Digital-Converters: Modeling, Blind Identification and Digital Correction of Frequency Response Mismatches will be publicly examined at the Faculty of Computing and Electrical Engineering of Tampere University of Technology (TUT) in room SJ204 in the Sähkötalo building (address: Korkeakoulunkatu 6, Tampere, Finland) at 12 noon on Friday, 12 August 2016.

The opponent will be Professor Timo Rahkonen (University of Oulu, Finland). Professor Mikko Valkama from the Department of Electronics and Communications Engineering at TUT will act as Chairman.

Simran Singh (31) is a doctoral candidate at the Department of Electronics and Communications Engineering of TUT.

The dissertation is available online at:

Further information: Simran Singh,

News submitted by: Sanna Kähkönen
Keywords: science and research