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:
May. 07, 2002
Filed:
Jan. 28, 2000
Hidehiko Kuroda, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
The present invention provides a charge pump circuit capable of operating at a high speed with a low power source voltage and increasing the synchronization processing speed. The charge pump circuit comprises: a first switch circuit connected between a first input node through which a first signal CPin is input and a base of an NPN transistor Q for controlling the NPN transistor Q in response to the first signal CPin and a second switch circuit connected between a second input node and a base of an NPN transistor Q for controlling the NPN transistor Q in response to a second signal CPin The transistors Q and Q and transistors contained in the first and the second switch circuits and are all NPN transistors.