Image sensor with image smoothing capability using a neuron MOSFET

Junichi Nakamura; Eric R. Fossum

doi:10.1117/12.172770

1 May 1994 Image sensor with image smoothing capability using a neuron MOSFET

Junichi Nakamura, Eric R. Fossum

Proceedings Volume 2172, Charge-Coupled Devices and Solid State Optical Sensors IV; (1994) https://doi.org/10.1117/12.172770
Event: IS&T/SPIE 1994 International Symposium on Electronic Imaging: Science and Technology, 1994, San Jose, CA, United States

Abstract

A novel image sensor with image smoothing capability is described. The image smoothing is performed in real time by a neuron MOSFET implemented on-chip. The neuron MOSFET has multiple input gates and a floating gate. The floating gate is capacitively coupled to the input gates, thereby performing gate-level weighted-sum operations. A pixel output node of the image sensor is connected to the input gates of several neuron MOSFETs which are implemented on the periphery of the imaging area. The pixel output is weighted by the input gate's capacitance value and summed up on the floating gate. Thus the filter characteristic is determined by the input gates' capacitance values and the number of pixels connected to the input gates of a neuron MOSFET. An active pixel sensor approach is suitable for the architecture because of its large driving capability. SPICE simulation results and experimental results of a linear array and a test structure are reported. The linear array outputs smoothed image and raw pixel signal. An edge detected signal can be obtained by subtracting the smoothed signal from the pixel signal. An area array configuration is also introduced.

Citation Download Citation

Junichi Nakamura and Eric R. Fossum "Image sensor with image smoothing capability using a neuron MOSFET", Proc. SPIE 2172, Charge-Coupled Devices and Solid State Optical Sensors IV, (1 May 1994); https://doi.org/10.1117/12.172770

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