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. 28, 1999
Filed:
Sep. 11, 1997
Tomohisa Wada, Tokyo, JP;
Masaaki Mihara, Tokyo, JP;
Yasuhiko Taito, Tokyo, JP;
Yoshikazu Miyawaki, Tokyo, JP;
Katsumi Dosaka, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A semiconductor integrated circuit device with a high voltage detection circuit comprises a high voltage step-down circuit for stepping down a high voltage input and outputting the stepped-down voltage, a reference voltage generator for generating plural reference voltages, a reference voltage selector for selecting one of the plural reference voltages, a high voltage detection circuit for comparing the stepped down voltage with the selected reference voltage to detect a high voltage and a control circuit for controlling the voltage drop of the high voltage and selection of the plural reference voltages to set the high voltage to be detected by the high voltage detector. There is also disclosed semiconductor integrated circuit having a high voltage step-down circuit for outputting plural stepped-down voltages having a fine tuner for fine-tuning each of the plural stepped-down voltages wherein a stepped-down voltage having been tuned finely is compared with a reference voltage given by a reference voltage generator.