The CMOS Sensor Inc Large Format Camera Technology provides mixed mode system on chip (SOC) IC units. It combines analog circuitry, digital circuitry and optical sensor circuitry into a tiny chip. The circuit includes advanced readout structure to reduce the fixed pattern noise, increase dynamic range and improve linearity. Each unit has an independent circuit as a fundamental building block, including a 5Kx5K active pixel sensor array, 5K row and 5K column select shift registers, a row of UGA and CDS circuits, 8x programmable gain differential amplifier, 8x 12 bit analog to digital convertor (ADC), 2x 4 to 1 output mux and driver, voltage regulator, timing generator and low voltage differential signal receiver (LVDS RX) together. The device can be operated in imaging mode or power down mode.

The Large Format Camera chips are built with CMOS Sensor Inc’s patented wafer level stitching technology, which makes it possible to obtain seamless image sensing areas with different pixel numbers such as 25M, 50M, 100M, 150M, 200M, 250M, etc, by integrating different numbers of the fundamental 5Kx5K pixel building block. For example, a 100M (10Kx10K) pixel image sensor array contains four 5Kx5K pixel CMOS sensor units in a single chip without any seam.

An example of the flexibility of our large format camera technology was applied to an aviation application. Due to continuous movement of the airplane, the Large Format Camera requires global shutter with short exposure time. Short exposure time can be easily achieved by implementing electrical exposure time control. However, there is a stray light issue especially when the exposure is much shorter than the data read out and processing time.

For Aviation applications, the pictures are usually taken from high altitude. Large format with large pixel size is r equired in order to achieve good quality of pictures. The pixel size of our chips is 4.8 um square on an element pitch of 5.0 um. The total photo sensing area is 5 cm by 5 cm for a 100M pixel camera. The device can response over the spectral wavelength of 400 to 1100 nm with high resolution . Particularly, the capability of sensing IR enables night vision.