About AnSem

A leading fabless ASIC Design Service company

The vision of AnSem is to be the leading fabless ASIC Design Service company, by bringing innovation on chip. Its mission is designing and delivering state-of-the-art analog and mixed-signal integrated circuits to customers worldwide by successfully selecting and executing projects that serve as a reference to our skills. AnSem aims at delivering customer satisfaction that results in repeat business through identifying – jointly – customer requirements and expectations in terms of quality, performance, timescales and costs.

In order to achieve its mission, AnSem invests in attracting and retaining the best technical staff, capable of closely working with customers in order to define the most appropriate chip. AnSem operates a customer oriented design methodology, focused on the requirements of the clients.

AnSem offers two complementary business models:

  • Custom mixed-signal IC design
  • Turnkey ASIC solutions based on a combination of in-house competences and a solid network of trusted suppliers and subcontractors.

AnSem NV was established by Stefan Gogaert and Jan Crols on February 13th 1998 as a spin-off from KULeuven and imec. The headquarters are based in Heverlee (Leuven). On December 16th 2016, AnSem becomes an international company by establishing an affiliate design center in Enschede, The Netherlands.

The customers of AnSem are mainly leading system OEM companies and (fabless) semiconductor companies, predominantly active in health, industrial, consumer and automotive markets.

AnSem NV has more than 500 years of ASIC design experience and the team has completed more than 70 projects. AnSem is ISO 9001:2015 certified since September 2016 and carries the ISO 9001 certificate since 2007. To download our quality certificate, click here.

The board of directors consists of:

Why AnSem?

We bring innovation on chip, flexible to your needs.

Proven leader in analog, RF & mixed-signal ASIC development

Key design expertise in wireless and wired data transmission, sensor data acquisition, high voltage and ultra-low power applications

Strong customer-orientation serving customers worldwide

Established industrial network of foundries, test and package suppliers, capable of delivering high-performance, reliable and cost-effective solutions

Committed to quality & innovation

Board of Directors

Willy Sansen - Independent Director & Chairman

Willy Sansen received a PhD degree from U.C.Berkeley in 1972. Since 1980 he has been full professor at the Catholic University of Leuven, in Belgium. From 1984 to 2008, he has headed the ESAT-MICAS laboratory on analog design, which has created six spinoffs in the last fifteen years. He has been supervisor of sixty-four PhD theses and has authored and coauthored more than 650 publications and fifteen books among which the Powerpoint slide based book "Analog Design Essentials" (Springer 2006)

He is a member of several editorial and program committees of journals and conferences. He was Program chair of the ISSCC-2002 conference and President of the IEEE Solid-State Circuits Society in 2008-2009. He is the recipient of the D.O.Pederson award of the IEEE Solid-State Circuits in 2011. He is a Life Fellow of the IEEE.

Willy Sansen

Ludo Deferm - Director

Ludo Deferm received the Electrical Engineering Degree in Electronics and Mechanics in 1982 and the Ph.D. Degree in 1989 from the University of Leuven, Belgium.

From 1982 to 1985 he was a research assistant at the University of Leuven, being responsible for thedevelopment of a 3 µm CMOS process for external customers with the main area in the device physics forscaling CMOS processes.

In 1985 he joined imec in Belgium where he was involved in the development of CMOS processes. In 1992 he became head of the Si Process Development Group and in 1998 he proceeded his career as adjunct vice president of the Silicon Technology and Device Integration division.

In October 1999 he was appointed Vice President of Business Development for imec, being responsible for business development worldwide, for the legal and IP/patent group and for the public relations and marketing communications activities. Within the scope of his responsibilities he is actively involved in the creation of new spin-off companies and in the expansion of imec.

Since 2006 he is Executive Vice President and Head of Corporate, Business and Public Affairs of imec and is responsible for government relations. He is currently member of the Board of Directors of the imec affiliates mentioned hereafter Fidimec, imec Nederland, imec Taiwan, imec China and imec India. He is member of the Board of Directors of the following external companies: Xenics nv, Holst Centre, Trinean, Energyville, RVO-Society, Pepric and Essensium. He is also advisor to TNO, Crann Institute, University Gent and the SOFI Fund.

Luc Kindt - Independent Director

Luc Kindt is currently Managing Principal and CEO of the private equity group Leeward in Luxemburg, after having been for 6 years the Executive Board & Managing Partner of the venture capital and private equity QAT group, also in Luxemburg.

Prior to his engagements in the private equity world, Luc has been a Group Senior Vice President of Barco NV, where he has held several positions, among others, President Global Sales & Services and CEO of Barco Projection Systems.

Luc is an independent board member and advisor in various high-tech companies, is a member of IMEC's Scientific Advisory Board, is an advisor for eHealth to Agoria and is Chairman of the Board of the RVO Society Foundation.

Luc holds a Master in Electronics Engineering from the University of Leuven, Belgium and an MBA from the Vlerick Management School of Ghent, Belgium.

Stefan Gogaert - Executive Director

As AnSem's Chief Executive Officer and Chief Operations Officer, Stefan takes responsibility for strategic alliances, Finance, HR and ICT. He is also involved in setting up collaborative research projects with other companies and research institutes.

After his graduation, Stefan joined the group of Prof. Willy Sansen at the University of Leuven, Belgium, to conduct research on portable wireless EMG measuring systems and on integrated circuits for high-speed data communication.

In 1998 he co-founded AnSem and grew the company successfully to a well established design service company with customers worldwide.

Stefan Gogaert holds a Master in Electrical Engineering and a Postgraduate in Biomedical Engineering from the Catholic University of Leuven, Belgium.

Jan Crols - Executive Director

In 1998, Jan co-founded AnSem, where he is currently active as Chief Executive Officer and Chief Technology Officer. In this function he has overall technical responsibility for all developments in the area of wireless and wired data transmissions, data acquisition and ultra low power designs, implemented in CMOS technologies ranging from 0.35 µm to 40 nm.

Jan has published 30 articles in international scientific journals and 1 book. He is a member of the ESSCIRC & ISSCC technical program committees. Jan has been awarded the 1995 IEEE Solid-State Circuits Council Pre-doctoral Fellowship and the 1999 IEEE Circuits and Systems Society Guilleman-Cauer Award. Jan has extensive experience in project management in all the fields in which AnSem is active.

Jan holds a PhD in electrical engineering from the Catholic University of Leuven, Belgium.


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