DUAL-MODE PHOTOSENSITIVE PIXEL WITH GAIN STAGE

摘要

A photosensitive pixel with gain stage is disclosed. The photosensitive pixel with gain stage may receive an input light stimulus and output a corresponding output voltage in response to the input light stimulus. The output voltage may correspond linearly to the magnitude of the input light stimulus over a linear operating region and logarithmically to the magnitude of the input light stimulus over a logarithmic operating region. In this manner, the photosensitive pixel with gain stage may be both sensitive to input light stimuli over the linear operating region and may exhibit dynamic range enabling non-saturated response to input light stimuli over the logarithmic operating region.

主权项

1. A photosensitive pixel with gain stage comprising:
a photodetector module configured to receive an input light stimulus and induce a detection current into a detection node in response to a magnitude of the input light stimulus; a current mirror module comprising a mirrored current node and configured to induce a mirrored current on the mirrored current node in response to the detection current; and a mode threshold control module comprising an output node and configured to induce a current on the output node corresponding to a combination of the magnitude of the input light stimulus and an amplifier mode.