[Paper] A 1/1.7-inch 20Mpixel Back-Illuminated Stacked CMOS Image Sensor with Multi-Functional Modes

Abstract

We have developed a 1/1.7-inch 20Mpixel back-illuminated stacked CMOS image sensor with multi-functional modes which are parallel multiple sampling, the two simultaneous output streams and data compression. This sensor has achieved a RMS random noise of 1.3e-with the parallel multiple sampling and the two simultaneous output streams of 4Mpixel for a movie mode and 16Mpixel for a still mode with a 2.3Gb/s/lane high-speed interface. Moreover, the high speed output mode of 16Mpixel at 120fps with a low image degradation compression. The stacked structure realizes on an analog implementation of the double column parallel ADCs.

Noise reduction effect and analysis through serial multiple sampling in a CMOS image sensor with floating diffusion boost-driving

“…17. 31,32) This technique enables shortening the ΔT period and is assumed to improve the RTN value. The estimated RTN value of parallel multiple sampling under the conditions ΔS = ΔD = 2 µs is shown in Fig.…”

“…(7). These results indicate that ΔT is the most dominant parameter and each sampling time setting is important in reducing RTN.The parallel multiple sampling technique is described in Fig.17 31,32). This technique enables shortening the ΔT period and is assumed to improve the RTN value.…”