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. 03, 2002
Filed:
Jun. 02, 1999
Yasushi Nishibe, Aichi-ken, JP;
Yoshiharu Kawarazaki, Aichi-ken, JP;
Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho, Aichi-ken, JP;
Abstract
A microcomputer is not stopped to be monitored even in a state in which a wrong standby signal is detected. A watchdog circuit outputs a starting signal to a microcomputer . An output signal Q of a determination circuit is reset by this starting signal. If the determination circuit does not detect a standby signal st when a clock signal CK is input from the started microcomputer, the output signal Q is set. However, if the determination circuit detects the standby signal st, the output signal is held in a reset state. Even if the standby signal st is input, because an AND circuit does not output a standby signal ST due to the reset of the output signal Q, the watchdog circuit is prevented from entering a standby mode by the standby signal st.