A novel data transmission circuit for digital image sensors

Jiqing Zhang; Zhengfen Li; Shengyou Zhong; Libin Yao

doi:10.1117/12.2179999

13 April 2015 A novel data transmission circuit for digital image sensors

Jiqing Zhang, Zhengfen Li, Shengyou Zhong, Libin Yao

Proceedings Volume 9522, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics 2014, Part II; 95221G (2015) https://doi.org/10.1117/12.2179999
Event: Selected Proceedings of the Photoelectronic Technology Committee Conferences held August-October 2014, 2014, China, China

Abstract

A novel data transmission circuit for digital image sensors is presented. Large amounts of data are divided into m groups of n bits each. Each group of data is stored in an n-bit shift register. Under the control of a column scanner, at a time, only one group of data is selected to output serially to a common output line. Thus, as the scanner scans all the groups of data, the large amounts of data are serially output through the common line. A current-mode circuit transforms the output data into a low voltage swing signal which propagates over the common output line fast. A sense amplifier receives the low voltage swing signal and then recovers the full swing signal. Finally, a low-voltage differential signaling ( LVDS ) transmitter, which is fed with the full swing signal, transmits the data out chip. Because there is always only one of the m shift registers operating, the power consumption is greatly reduced. The simulation results show that the proposed circuit works correctly at a date rate of 400Mb/s. For n=14, and m=8, 32, 128, and 256, the power consumption of the prototype is as low as 1/4, 1/15, 1/50, and 1/80 that of the traditional serial link respectively.

Citation Download Citation

Jiqing Zhang, Zhengfen Li, Shengyou Zhong, and Libin Yao "A novel data transmission circuit for digital image sensors", Proc. SPIE 9522, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics 2014, Part II, 95221G (13 April 2015); https://doi.org/10.1117/12.2179999

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