Micro-Digital Sun Sensor is an attitude sensor which senses relative position of micro-satellites to the sun in space. It is composed of a solar cell power supply, a RF communication block and an imaging chip which is called APS+. The APS+integrates a CMOS Active Pixel Sensor (APS) of 512×512 pixels, a 12 bit Analogue to Digital Converter (ADC), digital Input and Output (I/O) circuits, timing signal generators and drivers, and digital signal processing circuits for centroid calculation. The paper describes the implementation of a prototype of the µDSS APS+ using a standard 0.18µm CMOS process. As a space application, it is particularly characterized by its low power consumption. The reduction of power consumption is mainly achieved by windowing, which is enabled by a specific active-pixel design in APS. The functions of the blocks in APS+ are tested. The test results of a test chip which contains 368×00368 pixel array will be discussed following in the paper.
[1]
Xinyang Wang,et al.
A CMOS Image Sensor with row and column profiling means
,
2008,
2008 IEEE Sensors.
[2]
A. El Gamal,et al.
CMOS image sensors
,
2005,
IEEE Circuits and Devices Magazine.
[3]
T. Kurashina,et al.
A high-speed CMOS image sensor with profile data acquiring function
,
2005,
IEEE Journal of Solid-State Circuits.
[4]
A. Gamal,et al.
CMOS Sensors for Optical Molecular Imaging
,
2007
.
[5]
B.J. Hosticka,et al.
A 1K×1K high dynamic range CMOS image sensor with on-chip programmable region of interest readout
,
2002,
Proceedings of the 27th European Solid-State Circuits Conference.