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:
Nov. 13, 2001
Filed:
Mar. 16, 1999
Applicant:
Inventors:
Mako Kobayashi, Hyogo, JP;
Akira Yamazaki, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F 1/10 ; G05F 3/02 ;
U.S. Cl.
CPC ...
G05F 1/10 ; G05F 3/02 ;
Abstract
A semiconductor integrated circuit device includes an oscillator generating a clock signal and a charge pump circuit. The charge pump circuit includes capacity elements and an output transistor. The capacity element boosts a voltage on a boost node. The transistor (clamp circuit) clamps the voltage level on the boost node to a constant value. The capacity element controls the gate voltage of the output transistor. The clamp circuit is used to suppress a voltage applied to the transistors and the MOS capacity element, and suppresses generation of hot carriers.