Electronics laboratory

Microelectronic Circuits Design

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The Microelectronic Circuits Design Group has several activities in VLSI chip design and related areas. The group activities deal with techniques and theories that make possible either integrated systems with new capabilities, or the high level of integration systems previously implemented in multi-chip and/or discrete component form. The emphasis is on mixed analog/digital integrated circuits. The applications considered are mainly telecommunications and signal processing, from voiceband through video to GHz frequencies. The present and envisaged activities of the group can be broken into the following categories:

Studies of fundamental limitations of integrated circuits, such as noise and its relation to chip size and selectivity, and

Computer-aided circuit design; including chip design per se and the development of (design assistants) for the implementation of integrated analog circuits.

The group is the EUROCHIP representative for the NTUA.

Participation in research projects:
The group, though newly established, is currently participating in 4 National and European projects. Namely:

Hellenic VLSI-DPE, Esprit Project No. 5692
This project deals with the development of the industrial and academic research environment for the design of VLSI circuits. The group has already developed a continuous-time analog filter for Intracom, a major telecommunications industry in Greece. The filter is to be used in a remote control system. The first version of the chip has already been fabricated and tested successfully, while a second version is under testing. (Y.Tsividis, Y. Papananos, T.Georgantas).

HVLSI-DPE, STRIDE Phase
This project is a continuation of project (a). Within this project, the group is co-operating with a small electronics firm for the development of a mixed analog/digital chip for a remote control system. (Y.Tsividis, Y. Papananos, T . Georgantas).

MlnOSS Esprit Project No. 7101
The primary aim of this project is to analyse and formulate an advanced design methodology and the development of specific building blocks to be used in conjunction with conventional libraries for the fast and reliable implementation of microintegrated intelligent optical sensor systems. The appropriateness of the basic design tools selected will be demonstrated on test vehicles of industrial and environmental interest. The group has already designed three integrated circuits for the needs of the project, namely a notch filter, a chopper amplifier with very low offset and noise and a fully balanced operational amplifier. The chips are currently under fabrication. (Y.Tsividis, Y. Papananos, S.Pipilos).

PENED No. 91ED122
This project deals with the development of techniques for the implementation of fuzzy logic systems in VLSI technology. The appropriateness of the selected techniques will be demonstrated with the implementation of experimental circuits for fuzzy logic operations (S . Bouras, Y.Tsividis)

Two more research projects in Esprit have been approved and are in the contract signing phase at the time of writing.

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