Distance measuring device

Abstract

To make it possible to accurately measure a distance without depending on fluctuation in a power supply voltage. A distance measuring device includes: an oscillator that generates a first clock signal whose oscillation frequency changes according to the fluctuation in the power supply voltage; a first counting unit that repeats operation of counting the number of the first clock signals in a first period set in advance a plurality of times; a jitter detection unit that performs averaging processing of count values for the plurality of times by the first counting unit to detect jitter due to the fluctuation in the power supply voltage; a light receiving element that emits a light signal to an object and receives a reflected light signal from the object every second period including a plurality of the first periods; a first histogram generation unit that generates a first histogram representing an appearance frequency for each of timings at which the reflected light signal is received; and a distance calculation unit that measures a distance to the object on the basis of the first histogram.

Dependencies are inferred from the claim text.