论文信息 - A Per-Pixel Pulse-FM Background Subtraction Circuit with 175ppm Accuracy for Imaging Applications

A Per-Pixel Pulse-FM Background Subtraction Circuit with 175ppm Accuracy for Imaging Applications

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

[1] T. Akin,et al. A readout circuit for QWIP infrared detector arrays using current mirroring integration , 2003, ESSCIRC 2004 - 29th European Solid-State Circuits Conference (IEEE Cat. No.03EX705).

[2] Hee Chul Lee,et al. Multiple integration method for a high signal-to-noise ratio readout integrated circuit , 2005, IEEE Trans. Circuits Syst. II Express Briefs.

[3] Richard M Levenson,et al. Autofluorescence removal, multiplexing, and automated analysis methods for in-vivo fluorescence imaging. , 2005, Journal of biomedical optics.

[4] Timothy Shaw,et al. High dynamic range low-noise focal plane readout for VLWIR applications implemented with current mode background subtraction , 1998, Defense, Security, and Sensing.

[5] Stuart Kleinfelder,et al. Focal plane array readout integrated circuit with per-pixel analog-to-digital and digital-to-analog conversion , 2000, Defense, Security, and Sensing.

[6] Chung-Yu Wu,et al. High-performance CMOS buffered gate modulation input (BGMI) readout circuits for IR FPA , 1998, IEEE J. Solid State Circuits.

[7] Doo Hyung Woo,et al. Current-mode background suppression for 2-D LWIR applications , 2005 .