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:
Sep. 27, 2016
Filed:
Feb. 21, 2013
Lapis Semiconductor Co., Ltd., Tokyo, JP;
Katsutoshi Yoshimura, Tokyo, JP;
Kazutoshi Inoue, Tokyo, JP;
LAPIS SEMICONDUCTOR CO., LTD., Yokohama, JP;
Abstract
There is provided an oscillation circuit including: a main oscillation circuit that outputs a specific main clock to an internal circuit; a sub oscillation circuit that outputs a sub clock having a different frequency to the frequency of the main oscillation circuit; a first abnormality detection section that detects an abnormality according to a number of main clock cycles output from the main oscillation circuit within a predetermined period corresponding to sub clock outputs from the sub oscillation circuit; and a second abnormality detection section that detects an abnormality according to a frequency divided clock of the main clock output from the main oscillation circuit that has been frequency-divided and the sub clock output from the sub oscillation circuit.