Light-Controlled Biphasic Current Stimulator IC Using CMOS Image Sensors for High-Resolution Retinal Prosthesis and In Vitro Experimental Results With rd1 Mouse

2015 ◽  
Vol 62 (1) ◽  
pp. 70-79 ◽  
Author(s):  
Sungjin Oh ◽  
Jae-Hyun Ahn ◽  
Sangmin Lee ◽  
Hyoungho Ko ◽  
Jong Mo Seo ◽  
...  
Keyword(s):  
High Resolution ◽  
Retinal Prosthesis ◽  
Image Sensors ◽  
Experimental Results ◽  
Cmos Image Sensors ◽  
Rd1 Mouse ◽  
Current Stimulator

A CURRENT SOURCE WITH IMMUNITY FROM IR-DROP FOR HIGH-RESOLUTION CMOS IMAGE SENSORS

2013 ◽  
Vol 22 (01) ◽  
pp. 1250076 ◽  
Author(s):  
KAIMING NIE ◽  
SUYING YAO ◽  
JIANGTAO XU ◽  
JING GAO
Keyword(s):  
High Resolution ◽  
Power Level ◽  
Current Source ◽  
Image Sensors ◽  
Two Phase ◽  
Mos Transistor ◽  
Ir Drop ◽  
Cmos Image Sensors ◽  
Stable Current ◽  
A Current

A current source circuit for high-resolution CMOS image sensors is introduced in this paper, which can provide a stable current with immunity from IR-drop along the power and ground wires. In the circuit, two pre-charged floating capacitors controlled by two-phase non-overlap clock are connected between the gate and source of a MOS transistor alternately to maintain a constant V GS of the MOS transistor. In this way, the current flowing through the MOS transistor will be stable and has nothing to do with power level. The post simulation results show that the current supplied by the proposed circuit decreases only by 1.6% when the voltage of the power supply decreases by 30%. The simulations have proved that the proposed circuit can improve the performance of high-resolution CMOS image sensors.

scholarly journals 4+1-transistor pixel architecture for high-speed, high-resolution CMOS image sensors

2011 ◽  
Vol 47 (22) ◽  
pp. 1221 ◽  
Author(s):  
A. Xhakoni ◽  
D. San Segundo Bello ◽  
P. De Wit ◽  
G. Gielen
Keyword(s):  
High Resolution ◽  
High Speed ◽  
Image Sensors ◽  
Cmos Image Sensors
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