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. 10, 2002
Filed:
Feb. 05, 2001
Olivier Rey, Lignières, CH;
Christian Bonjour, Lignières, CH;
EM Microelectronic-Marin SA, , CH;
Abstract
The charge pump device includes, in a cascade arrangement, a plurality of stages ( to N) for transferring a potential charge from one stage to the next in response to clock signals (PHI, PA, PHINOT, PB), each stage including, arranged between an input (A ) and an output (A ), a switching circuit ( ) and a storage capacitor (Ca; Cb). Each switching circuit is formed of a first transistor ( ) and a second transistor ( ), the drains of the first and second transistors being connected to the input (A ) of the stage, the source of the first transistor ( ) being connected to the gate of the second transistor ( ) and the source of the second transistor being connected to output (A ) of the stage and to the gate of the first transistor. At each of the stages ( to N) there are provided starting-up means ( ) for keeping said second transistor ( ) in a non conducting state between two activation cycles of said charge pump device.