Patent 11353828 was granted and assigned to Stmicroelectronics (Research & Development) Limited on June, 2022 by the United States Patent and Trademark Office.
In an embodiment, a method includes: providing a gray-coded time reference to a time-to-digital converter (TDC); receiving an event from an event signal; latching the gray-coded time reference into a memory upon reception of the event signal; and updating a time-of-flight (ToF) histogram based on the latched gray-coded time reference.