Title :
A Per-Pixel Pulse-FM Background Subtraction Circuit with 175ppm Accuracy for Imaging Applications
Author :
Kavusi, S. ; Ghosh, Koushik ; El Gamal, Abbas
Author_Institution :
Stanford Univ., CA
Abstract :
A per-pixel background subtraction circuit for infrared and fluorescence imaging applications is presented. Charge packets controlled by a pulse-FM signal are subtracted from the integrator of each pixel. A 1times16 array of 30mum pixels prototyped in a 0.18mum CMOS process achieves noise, linearity, and spatial current variation of 175ppm, 270ppm, and 3%, respectively, at 43fps
Keywords :
CMOS integrated circuits; fluorescence; infrared imaging; pulse frequency modulation; 0.18 micron; CMOS process; charge packets; fluorescence imaging; infrared imaging; per-pixel background subtraction circuit; pulse-FM background subtraction circuit; pulse-FM signal; Background noise; Capacitors; Circuit noise; Image sensors; Linearity; Optical imaging; Photoconductivity; Pulse amplifiers; Pulse circuits; Pulsed power supplies;
Conference_Titel :
Solid-State Circuits Conference, 2007. ISSCC 2007. Digest of Technical Papers. IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
1-4244-0853-9
Electronic_ISBN :
0193-6530
DOI :
10.1109/ISSCC.2007.373515
