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:
Jun. 30, 1998
Filed:
Sep. 11, 1996
Hideaki Kondo, Kyoto, JP;
Akinori Shibayama, Hirakata, JP;
Matsushita Electronics Corporation, Osaka, JP;
Abstract
A voltage conversion circuit that includes a reference voltage generation circuit, an output circuit, and an output control circuit. The reference voltage generation circuit outputs a first reference voltage and a second reference voltage which is higher than the first reference voltage by a predetermined voltage. Based on the first reference voltage, the output circuit outputs an internally converted voltage. The output control circuit reduces the internally converted voltage when the control circuit outputs a higher internally converted voltage than the second reference voltage. In accordance with the voltage conversion circuit, even when there occurs an increase in the internally converted voltage due to the flow of very small leakage currents between an external power supply and the internal voltage conversion circuit, the internally converted voltage is lowered by the output control circuit when it exceeds the second reference voltage output from the reference voltage generation circuit. This prevents an excess increase in the internally converted voltage, which ensures that internal elements in the semiconductor integrated circuit can be fed a stable voltage.