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. 15, 2011
Filed:
Jun. 04, 2008
Tsuyoshi Yoshimura, Gunma, JP;
Taichiro Kawai, Kiryu, JP;
Tsuyoshi Yoshimura, Gunma, JP;
Taichiro Kawai, Kiryu, JP;
Semiconductor Components Industries, LLC, Phoenix, AZ (US);
Abstract
The invention provides a charge pump circuit which reduces rise time of an output current even when an input signal is of high frequency. PMOSand PMOShave gates connected to each other, and the gate of the PMOSis connected to the drain thereof. A supply potential (Vdd) is applied to the sources of the PMOSand the PMOS, and the PMOSand the PMOSform a current mirror circuit. First and second switching elements and a first constant-current source are connected to the drain of the PMOS. A connection point (a node) of the first switching element and the second switching element is connected to an output terminal. The drain of the PMOSis connected to the first constant-current source through a third switching element, and connected to a second constant-current source through a fourth switching element.