Micro-Integrated Intelligent Optical Sensor Systems


MINOSS - 7101

Keywords CAD, optical sensor systems, SMEs


Start Date: 01-JUL-92 / Duration: 36 months

[ contact / participants ]


Objectives

The main objectives of MINOSS are to:

The design methods and block descriptions will be embedded in existing CAD tools to speed up the design process while reducing the risk of introducing errors, inconsistencies or incompatibilities. A central goal is to develop methods and tools that can easily migrate to the design environments available to SMEs. The target technology is conventional analogue CMOS with state-of-the-art transistor line-widths.

The following three demonstrators will be used to test and validate the results:

Progress and Results

Process characterisation, methodology definition, behavioural modelling, cell/chip design and system design have been carried out.

The optical behaviour of the target technology was characterised by a set of optical measurements on specially designed and fabricated test photodiodes. The results show good uniformity in response and satisfactory spectral responsiveness in the 350-900 nm range after removal of the oxides and passivation over the photodiodes.

Guidelines for the design of analogue and digital circuits in an optically active environment were compiled. Behavioural modelling of optical components was started for photodiodes and photo-emitters. A third metal layer was added to the process to shield the circuits from stray light without redesigning the existing cell libraries.

The detailed architectures and the interface standards of the three demonstrators were finalised and preliminary versions of a complete colour measurement system based on discrete components and the electronics for the miniature spectrometer were demonstrated. Design has been completed and silicon is being fabricated of the following cells: an integrated version of the intelligent sensor for spectrometry, including 512-pixel linear photo-diode array, charge amplifier, cyclic 10-bit analogue to digital converter, second-order polynomial solver for calibration and microprocessor interface; a macrocell containing a 128 x 128 pixel 2-dimensional array with charge amplifier; a 64 x 64 pixel 2-D array with on-chip analogue circuitry for motion detection; a synchronous modulator/demodulator, and the digital portion of a 20-bit sigma-delta analogue-to-digital converter. The silicon of these cells is currently being fabricated. A 3-step 8-bit flash analogue-to-digital video converter, a 256 x 256 pixel array with embedded converters and building blocks for a digital convolver are currently being designed.


CONTACT POINT

Mr S. Trueman
Istituto per la Ricerca
Scientifica e Tecnologica
Loc. Pant di Povo
I - 38050 Trento
tel: + 39/461 -814458
fax: + 39/461 - 810851
email: trueman@irst.it

Participants

ISTITUTO TRENTINO DI CULTURA - I - C
FORSCHUNGSGES JOANNEUM RESEARCH - A - P
MIETEC NV - B - P
NTUA (MICROWAVE AND OPTICS GROUP) - GR - P
UNIVERSITY OF KENT - UK - P
KAPSCH AG - A - P
INTRACOM SA - GR - P
UNIVERSITA DEGLI STUDI DI PAVIA - I - A


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MINOSS - 7101, December 1993


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html version of synopsis by Nick Cook