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:
Oct. 24, 2023
Filed:
Sep. 08, 2022
Renesas Electronics Corporation, Tokyo, JP;
Hiroyuki Watanabe, Tokyo, JP;
Hideshi Shimo, Tokyo, JP;
Renesas Electronics Corporation, Tokyo, JP;
Abstract
A semiconductor device and a method for controlling body bias thereof capable of properly controlling body bias of a transistor even in a case where process variation occurs are provided. Operation speeds of ring oscillators ROSCn and ROSCp respectively change due to an influence of process variation at an NMOS transistor MN side and a PMOS transistor MP side. Speed/bias data represent a correspondence relationship between the operation speeds of the ring oscillators ROSCn and ROSCp and set values Vn and Vp of body biases VBN and VBP. A body bias controller receives speed values Sn and Sp measured for the ring oscillators ROSCn and ROSCp to which the body biases VBN and VBP based on default values are respectively applied, and obtains the set values Vn and Vp on the basis of the speed/bias data.