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A high-dynamic-range CMOS image sensor for automotive applications

: Schanz, M.; Nitta, C.; Bußmann, A.; Hosticka, B.J.; Wertheimer, R.


IEEE journal of solid-state circuits 35 (2000), Nr.7, S.932-938 : Lit.
ISSN: 0018-9200
European Solid State Circuits Conference (ESSCIRC) <25, 1999, Duisburg>
Konferenzbeitrag, Zeitschriftenaufsatz
Fraunhofer IMS ()
CMOS integrated circuits; image processing; image sensor; smart pixel; intelligent sensor; road vehicle electronics; Bildsensor; Kraftfahrzeug; photodiode

In this contribution, a 256 x 256 pixel CMOS imager is described that exhibits 120-dB dynamic range, 56-dB signal-to-noise ratio (SNR), 65% fill factor, and an effective frame rate of 50 Hz. This has been achieved using a unique combination of a multiexposure and a multigain linear readout. The imager has been integrated in 1-µm double-metal CMOS technology. The intend application is for driver's assistant systems, but the imager can be used for a wide range of applications requiring high dynamic range.