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. 19, 2000
Filed:
Aug. 20, 1999
Andrea Ghilardelli, Cinisello Balsamo-MI, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
A charge pump circuit for integrated memory devices includes a plurality of stages cascade connected between an input terminal having a first voltage reference and an output terminal. Each stage includes a boost capacitor and one PMOS transistor functioning as a pass transistor. Each PMOS transistor has conduction terminals connected between the previous stage and the next stage, and a control terminal receiving a drive signal. The pass transistors are driven with a voltage that has a ground value when they are to be turned on, and a voltage equal to the highest of the positive voltages involved when they are to be turned off. The highest of the positive voltages involved is the output from the charge pump.