Invention Grant
- Patent Title: Readout voltage uncertainty compensation in time-of-flight imaging pixels
-
Application No.: US16503896Application Date: 2019-07-05
-
Publication No.: US10742912B2Publication Date: 2020-08-11
- Inventor: Cyrus Soli Bamji , Onur Can Akkaya , Tamer Elkhatib , Swati Mehta , Satyadev H. Nagaraja , Vijay Rajasekaran
- Applicant: Microsoft Technology Licensing, LLC
- Applicant Address: US WA Redmond
- Assignee: Microsoft Technology Licensing, LLC
- Current Assignee: Microsoft Technology Licensing, LLC
- Current Assignee Address: US WA Redmond
- Main IPC: H04N5/363
- IPC: H04N5/363 ; H01L27/146 ; G01S7/481 ; G01S17/89

Abstract:
Pixel arrangements in time-of-flight sensors are presented that include sensing elements that establish charges related to incident light, charge storage elements that accumulate integrated charges transferred from the sensing elements, and diffusion nodes configured to establish measurement voltages representative of the integrated charges that are dumped from the charge storage elements. The pixel arrangement includes analog domain output circuitry comprising a measurement capacitance element that stores the measurement voltage, and a reset capacitance element that stores a reset voltage established at the diffusion node during a reset phase performed prior to a measurement phase. The analog domain output circuitry subtracts the stored reset voltage from the stored measurement voltage for processing into a pixel output voltage that at least partially reduces readout voltage uncertainty of the pixel arrangement.
Public/Granted literature
- US20190335124A1 READOUT VOLTAGE UNCERTAINTY COMPENSATION IN TIME-OF-FLIGHT IMAGING PIXELS Public/Granted day:2019-10-31
Information query