Spanish National Research Council · University of Seville
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Research Units » Design of Digital and Mixed-Signal Integrated Circuits » CMOS Digital Integrated Circuits

CMOS Digital Integrated Circuits


Antonio J. Acosta Jiménez


Keywords: high-performance digital design; ASICs; timing problems; low-power and low-noise techniques; design of digital cells

This research topic has as main aim the efficient implementation of digital integrated circuits on ASICs at several abstraction levels: at a transistor level, designing basic digital cells with a full-custom methodology; at a gate level, finding optimum solutions for combinational and sequential circuits; at a circuit level, developing architectures and timing strategies. Transversal optimization mechanisms are employed in all these implementations, such as for instance, switching activity analysis, minimization of power consumption, low switching-noise generation, design of cells with data-independent power consumption, design for high-speed applications, etc.
Work in this topic faces:
  • Design of digital ASICS in nanometer technologies.
  • Design of digital cells optimized for several parameters (i.e., dynamic power consumption, leakage, speed, area, noise, ...)
  • Timing problems in digital circuits.
  • Combined techniques for power and noise reduction in digital circuits.
Main results achieved include:
  • Design, fabrication and test of digital ASICs following full-custom and semi-custom methodologies, in different technologies, including nanometric ones, for applications in control, security, communication, computational intelligence, etc.
  • Development of an automatic and systematic methodology for testing ASICs in the laboratory.
  • Design of robust cells and circuits against timing failures, with very low power consumption, low switching-noise generation, and data-independent power consumption.
  • Development of different combined noise-power (dynamic and leakage) reduction techniques.
Test board and ASIC incorporating a double-memory programmable and configurable PWAG controller
Layout of a 4-input 2-output PWA controller designed in a 90nm technology
Research Highlights
P. Brox, J. Castro-Ramírez, M.C. Martínez-Rodríguez, E. Tena, C.J. Jiménez, I. Baturone and A.J. Acosta, "A Programmable and Configurable ASIC to Generate Piece-wise-Affine Functions Defined Over General Partitions", IEEE Trans. on Circuits and Systems I: Regular Papers, vol. 60, no. 12, pp. 3182-3194 , 2013 » doi
A.J. Acosta, "Low Power and Security Trade-off in Hardware: From True Random Number Generators to DPA Resilience", Conferencia invitada al Energy Secure Systems Architecture Workshop ISCA 2014, Minnessotta, USA
M.C. Martínez-Rodríguez, P. Brox and I. Baturone, "Digital VLSI implementation of piecewise-affine controllers based on lattice approach", IEEE Transactions on Control Systems Technology, vol. 23, no. 3, pp. 842-854, 2015 » doi
P. Brox, M.C. Martínez-Rodríguez, E. Tena-Sánchez, I. Baturone and A.J. Acosta, "Application specific integrated circuit solution for multi-input multi-output piecewise-affine functions", International Journal of Circuit Theory and Applications, vol. 44, no. 1, pp. 4-20, 2016 » doi
Technology Transfer
A.J. Acosta, I. Baturone, J. Castro-Ramírez, C.J. Jiménez, P. Brox and M.C. Martínez-Rodríguez. Method for generating piecewise-affine multivariable functions with on-line computation of the search tree and device for implementing same. 2012 » pdf
Key Research Projects & Contracts
MOBY-DIC: Model-based synthesis of digital electronic circuits for embedded control (EC-IST-VIIPM no.-248858)
PI: Antonio J. Acosta Jiménez
Funding Body: 7th Framework Programme, European Commission
Dec 2009 - Nov 2013
CITIES: Integrated circuits for transmitting secure information (TEC2010-16870) » web
PI: Carlos J. Jiménez Fernández
Funding Body: Min. de Ciencia e Innovación
Jan 2011 - Sep 2014
CESAR: Secure microelectronic circuits against side-channel attacks (TEC2013-45534-R) » web
PI: Antonio J. Acosta Jiménez / Carlos J. Jiménez Fernández
Funding Body: Min. de Economía y Competitividad
Jan 2014 - Dec 2016
CRIPTO-BIO: Microelectronic design for crypto-biometric authentication (P08-TIC-03674) » web
PI: Iluminada Baturone Castillo
Funding Body: Junta de Andalucía - Proyectos de Excelencia
Jan 2009 - Dec 2013
INTERVALO: Integration and validation in laboratory of countermeasures against side-channel attacks in microelectronic cryptocircuits (TEC2016-80549-R)
PI: Antonio J. Acosta Jiménez / Carlos J. Jiménez Fernández
Funding Body: Min. de Economía, Industria y Competitividad
Dec 2016 - Dec 2019