A Single Chip CMOS APS Digital Camera

There is an enormous demand for low power, highly integrated image sensor systems. CMOS based Active Pixel Sensor (APS) technology enables this progression. We demonstrate a very low power, highly integrated, programmable, complete digital camera-on-a-chip based on CMOS APS technology. It features on-chip analog-to-digital converters (ADCs) in addition to full timing and control. All analog references required for proper imaging and digitization are generated on-chip with programmable digital to analog converters (DACs). Thus the camera has a complete digital interface. It can be programmed to support a variety of imaging operations and interface configurations through a single digital input pin, facilitating integration with external systems. The integration of this circuitry on the sensor does not degrade 8-bit imaging at normal operating speeds. A variety of power reduction features make it an ideal candidate for power constrained, portable, miniaturized applications. It is currently scheduled to be included in a highly miniaturized (<2 inch2) battery operated digital camera with a wireless interface.

A Single Chip CMOS APS Digital Camera