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:
Dec. 02, 2025
Filed:
Dec. 27, 2022
Sifotonics Technologies (Beijing) Co., Ltd., Beijing, CN;
SiFotonics Technologies (Beijing) Co., Ltd., Beijing, CN;
Abstract
The present invention provides a normal-incident photodiode structure with a dark current self-compensation function, including a photosensitive photodiode and a compensating photodiode, where a photosensitive surface of the compensating photodiode is provided with a light-blocking layer, and dark currents of the photosensitive photodiode and the compensating photodiode are equal. According to the present invention, the dark current self-compensation function may be implemented at a chip level without an external circuit and an operational amplifier; the normal-incident photodiode structure according to the present invention has the photosensitive photodiode and the compensating photodiode, and the compensating photodiode may counteract the dark current of the photosensitive photodiode during operation, thus reducing noise caused by the dark current of the photosensitive photodiode; and bias voltages of the photosensitive photodiode and the compensating photodiode according to the present invention are controlled separately, and thus may be applied to more usage scenarios.