A Design of Time-of-Flight Pixel for Optical Ranging

摘要

In this work, we proposed the schematic and layout design of timeof-flight pixel for optical ranging. The simulation shows that the ToFpixel can work at the modulated frequency of 1ï½10MHz. And theoutput voltage signals can realize distance calculation with smalldeviations. It has the capacity of background light cancellation of 40-dB and sensitive light detection, to utilize a low light level that is safefor human eyes. Its possible frame rate is 2000fps with 1MHzmodulated frequency and 100pA AC component, with the maximumerror of 0.42m.