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:
Mar. 17, 2026
Filed:
Apr. 25, 2022
Sumitomo Electric Industries, Ltd., Osaka, JP;
Yoshiyuki Sugimoto, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
A transimpedance amplifier circuit includes an amplifier circuit configured to convert a current signal into a voltage signal with a gain being varied based on a control signal and a gain control circuit configured to generate the control signal based on an amplitude of the voltage signal, an amplitude detection signal in accordance with the amplitude of the voltage signal, an amplitude reference signal, a differential voltage signal obtained by offsetting a voltage difference between the amplitude detection signal and the amplitude reference signal based on an amplitude setting signal, and a differential current signal based on the differential voltage signal. The gain control circuit includes a variable capacitance being varied based on the amplitude setting signal, and is configured to be charged/discharged by the differential current signal and output a charging voltage. The control signal is generated based on the charging voltage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile