1 May 1994 CIVIS sensor: a flexible smart imager with programmable resolution
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Abstract
For time-critical industrial machine vision applications, a dedicated imager has been developed. The camera can be programmed to operate in several resolutions, by binning the signal charges of neighboring pixels on the sensor plane itself. Additionally the readout window was made programmable and an electronic shutter function was implemented. This square 256 X 256 imager was fabricated in a standard 1.5 micrometers CMOS technology. The readout occurs in two phases. After transferring in parallel a row of charges to 256 charge sensitive amplifiers, these signals are coupled to a single output amplifier. By controlling the sequence of addresses and reset pulses of the amplifiers, charges of different pixels are accumulated. This way multiple resolutions can be programmed. The imager is operated at data rates up to 10 MHz providing about 125 full images per second. At lower resolution, even higher frame rates are obtained. The signal to noise ratio is about 35 dB. This paper reports on the fixed pattern noise, response, speed and smear behavior of this imager.
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Nico Ricquier, Nico Ricquier, Ingrid Debusschere, Ingrid Debusschere, Bart Dierickx, Bart Dierickx, A. Alaerts, A. Alaerts, Jan Vlummens, Jan Vlummens, Cor L. Claeys, Cor L. Claeys, } "CIVIS sensor: a flexible smart imager with programmable resolution", Proc. SPIE 2172, Charge-Coupled Devices and Solid State Optical Sensors IV, (1 May 1994); doi: 10.1117/12.172755; https://doi.org/10.1117/12.172755
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