Patent ID: 8638424
Filing Date: 2014-01-28
Classification: G01S

Abstract:
1. For use with a time-of-flight depth sensing system that includes an array of detectors driven by a first clock signal and a second clock signal, said first clock signal coupled to a capacitive load C L1 , and said second clock signal coupled to a capacitive load C L2 ≈C L1 , a method to reduce energy loss during clock transition changes in a clock driver that outputs said first clock signal and said second clock signal, the method including the following steps: (a) prior to a transition state change of said first clock signal and prior to a transition state change of said second clock signal, equalizing charge present on said capacitive load C (b) using charge present on a high state level one of said first clock signal and said second clock signal to elevate magnitude of charge present on a low state level one of said second clock signal and said first clock signal; wherein using said charge present on the high state level one of said first clock signal and said second clock signal at step (b) reduces power consumption of said clock driver.