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:
Jan. 26, 2016
Filed:
Mar. 26, 2013
Excelitas Canada Inc., Vaudreuil-Dorion, CA;
Frederic Laforce, Coteau-du-Lac, CA;
Excelitas Canada, Inc., Vaudreuill-Dorion, CA;
Abstract
A photoelectric receiver circuit for converting an optical signal to an electrical signal is presented. The receiver includes a photodetector connected between a transimpedance amplifier input and a high voltage supply providing a bias voltage to the photodetector. A high voltage supply variation sensing element is connected between the high voltage supply and a current controlled current source, where the current controlled source output is connected to the input of the transimpedance amplifier. A current limiter is connected between the high voltage supply and a high voltage source. The photocurrent passing through the current limiter lowers the high voltage supply and is detected by the sensing element. Current from the sensing element is processed at the input of the transimpedance amplifier to minimize the current into the transimpedance amplifier, limiting the saturation of the amplifier, thus improving recovery time when a high optical power pulse impinges the photodetector.