WORKSHOP PAPER
A 2.5pJ/b Readout Circuit for 1000fps Single-bit Quanta Image Sensors
Abstract
The document describes the development of a pathfinder (1Mpixel) 1000fps (1Gb/s output data rate) binary image sensor with pixel signal levels of 1mV that dissipates 20mW, including I/O pads, thereby demonstrating the power-dissipation viability of 1000 fps gigajot Quanta Image Sensors. Implemented in 0.18µm CMOS, the readout signal chain uses column-parallel fully differential charge-transfer amplifier (CTA) gain stages before a 1b-ADC, and pseudo-static clock gating units for row and column circuits to achieve an energy/bit figure of merit (FOM) of 2.5pJ/b for gain+ADC.Keywords
Quanta Image Sensors, Readout Circuit, Charge-Transfer Amplifier,References
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