Patent · US Active

Light propagation time sensor with a charge compensation device

US10436883B2 · kind B2 · utility

3Cited by

1References

10Claims

0Family size

Assignee

PMD TECHNOLOGIES AG · DE

Inventors

Michael Sommer · Gournay-sur-Marne, FR
Jens Prima · Gehrde, DE
Christoph Kamerow · Siegen, DE

Key dates

Filing date	Jul 17, 2015
Grant date	Oct 8, 2019
Priority date	—
Expiry date	Jul 28, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG01S17/894
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The present invention provides a time-of-flight sensor (22) including at least one time-of-flight pixel (23) for demodulating a received modulated light beam (Sp2), wherein the time-of-flight pixel (23) comprises at least two integrating nodes (Ga, Gb) and the integration nodes (Ga, Gb) are connected to a device (500) for charge compensation, wherein the charge compensation device (500) comprises at least two SBI input transistors (M1, M2) which at a potential (Ua, Ub) of the integration nodes (Ga, Gb) which according to the amount exceeds an SBI threshold value (USBI) drive SBI current transistors (M3, M4) such that at both integration nodes (Ga, Gb) a compensating current (ik) of the same level flows, wherein the source terminals of the SBI-current transistors (M3, M4) are not connected to a supply voltage (UDD) but are connected to a working voltage (URES, Uarb) (FIG. 7).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.