The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2013
Filed:
Jan. 25, 2011
David W. Ritter, San Jose, CA (US);
Philip Golden, Menlo Park, CA (US);
Carl Warren Craddock, San Francisco, CA (US);
Kevin Brehmer, Redwood Shores, CA (US);
David W. Ritter, San Jose, CA (US);
Philip Golden, Menlo Park, CA (US);
Carl Warren Craddock, San Francisco, CA (US);
Kevin Brehmer, Redwood Shores, CA (US);
Intersil Americas Inc., Milpitas, CA (US);
Abstract
A system and method that compensates for the effects of ambient light in a time of flight (TOF) sensor front end is provided. Moreover, a direct current (DC) correction loop is utilized at the front end, which removes a DC component from a current generated by the TOF sensor and accordingly prevents saturating the front end. The DC correction loop attenuates the DC component without adding significant thermal noise at a modulation frequency and provides a corrected signal to the front end circuitry. The corrected signal is processed and utilized to detect a position of an object within the optical field of the sensor.