SPAD
A photodiode operating in Geiger mode that can detect single photons and output avalanche pulses, commonly used in dToF depth sensing and photon counting.
Timeline (last 90 days)
dToF obtains distance by directly measuring the flight time of light pulses (such as single-photon avalanche diode SPAD timing), offering high precision and long range, but with complex hardware and higher cost.
SPAD (Princeton/University of Washington) designs the chip from scratch: when HBM bandwidth is cut by 40%, prefill is only 17% slower, and when compute is cut by 50%, decode is only 22% slower, with cluster simulations showing a 19% to 41% reduction in hardware cost.
All Facts (2)
dToF obtains distance by directly measuring the flight time of light pulses (such as single-photon avalanche diode SPAD timing), offering high precision and long range, but with complex hardware and higher cost.
50%UnverifiedSPAD (Princeton/University of Washington) designs the chip from scratch: when HBM bandwidth is cut by 40%, prefill is only 17% slower, and when compute is cut by 50%, decode is only 22% slower, with cluster simulations showing a 19% to 41% reduction in hardware cost.
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