Synchronization system for controlling switches

摘要

An optical ranging system includes optics that create a backscatter signal in response to a transmitted light pulse. The transmitted pulse is reflected from a target to provide range information. The backscatter signal is applied to trigger a threshold detector. The output of the threshold circuit is applied to a delay circuit to provide a receiver switch control signal which renders a receiver switch conductive after the backscatter signal. Accordingly, the receiver switch blanks the backscatter signal and applies the reflected signal to the receiver.