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. 22, 2020
Filed:
Jan. 08, 2019
Renesas Electronics Corporation, Tokyo, JP;
Keisuke Kimura, Tokyo, JP;
RENESAS ELECTRONICS CORPORATION, Tokyo, JP;
Abstract
A semiconductor device has a drive transistor coupled to a load and a current detection circuit. The current detection circuit includes: an operational amplifier amplifying a potential difference between voltage of a first terminal and voltage of a second terminal; a sense transistor passing sense current between the first terminal and the drive transistor; a voltage supply circuit having a first current source and supplying voltage higher than voltage supplied to the grounding voltage terminal to the second terminal; a third terminal outputting current based on the sense current; a second current source coupled between the third terminal and the grounding voltage terminal; and a current source control circuit controlling current of the first and second current sources. Detection current detected by the current detection circuit is current obtained by subtracting the current of the second current source from the current based on the sense current.