Supervision : Habib MEHREZ

Co-supervision : LOUËRAT Marie-Minerve

CBackground Analog and Mixed Signal Calibration System For Time-Interleaved ADC

In this work, we present a Time-Interleaved ADC (TIADC) calibration technique for four different types of mismatches (offset, gain, time skew and bandwidth). The mismatches and the calibration technique are analysed analytically. The calibration operates in background mode using a novel technique. The calibration system is an analog mixed one where the error detection is performed digitally by three detectors: one for the offset, one for
the amplitude and one for the phase. The corrections of the time skew and the bandwidth mismatches depend on a Digitally Controlled Delay Line and a tunable switch resistor respectively. These analog techniques are designed on a ST CMOS 40 nm technology. A calibration sequence is presented which helps to distinguish between the different errors to perform the error detection correctly. The efficiency and the accuracy of the calibration technique are illustrated by the system level simulations.
The calibration system architecture and specifications for a 4 channel, 12 bit, 800 MS/s TIADC are presented. It consists of two parts: the Analog Mixed sub-system (AMS sub-system) where the correction of errors takes place and the digital sub-system where the control sequence and error detection take place. The digital sub-system is implemented using an FPGA in order to have a reconfigurable platform suitable for testing different TIADCs. The interface technique between the FPGA and the AMS sub-system is presented. Simulation of the whole system showing the efficiency of the approach is presented.

2010-2016 Publications

• 2016
  • Y. Moursy, R. Khalil, S. Lecce, V. Poletto, R. Iskander, M.‑M. Louërat : “Mixed-Signal PI Controller in Current-Mode DC-DC Buck Converter for Automotive Applications”, IEEE International Symposium on Circuits and Systems (ISCAS'16), Montréal, Canada, pp. 1610-1613, (IEEE) (2016)
  • Y. Moursy, H. Zou, R. Khalil, R. Iskander, P. Tisserand, D.‑M. Ton, G. Pasetti, M.‑M. Louërat : “Efficient Substrate Noise Coupling Verification and Failure Analysis Methodology for Smart Power ICs in Automotive Applications”, IEEE Transactions on Power Electronics, (Institute of Electrical and Electronics Engineers) (2016)
• 2015
  • R. Khalil, M.‑M. Louërat, R. Petigny : “Background Analog and Mixed Signal Calibration System For Time-Interleaved ADC”, Microelectronics Journal, vol. 46 (7), pp. 656–667, (Elsevier) (2015)
• 2013
  • R. Khalil Ayad : “CBackground Analog and Mixed Signal Calibration System For Time-Interleaved ADC”, thesis, phd defence 09/16/2013, supervision Mehrez, Habib, co-supervision : Louërat, Marie-Minerve (2013)
• 2012
  • R. Khalil, M.‑M. Louërat, R. Petigny, H. Gicquel : “Background Offset and Gain Calibration for Time-Interleaved ADC Using Digital Sinusoidal Calibration Signal”, The International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD) 2012, Seville, Spain, pp. 273-276, (IEEE) (2012)
  • R. Khalil, M.‑M. Louërat, R. Petigny, H. Gicquel : “Background Time Skew Calibration for Time-Interleaved ADC Using Phase Detection Method”, IEEE 10^th International New Circuits and Systems Conference (NEWCAS), Montreal, Canada, pp. 257-260 (2012)
• 2010
  • R. Khalil, A. Dudka, D. Galayko, R. Iskander, Ph. Basset : “Design and Modeling of a Successive Approximation ADC for the Electrostatic Harvester of Vibration Energy”, BMAS 2010 - IEEE International Behavioral Modeling and Simulation Conference, San Jose, United States, pp. 57-62, (IEEE) (2010)
  • R. Khalil, M. Allam, R. Iskander, M.‑M. Louërat : “Design and Modeling of 8-Bit Successive Approximation Analog to Digital Converter”, Colloque GDR SOC-SIP : System-On-Chip, System-In-Package, Paris, France, pp. 1-2 (2010)
  • R. Khalil, A. Dudka, D. Galayko, Ph. Basset : “High-voltage low power analogue-to-digital conversion for adaptive architectures of capacitive vibration energy harvesters”, Proceedings of PowerMEMS 2010, Louvain, Belgium, pp. 147-150 (2010)