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:
Feb. 16, 1999
Filed:
Oct. 21, 1996
Taqi Nasser Buti, Millbrook, NY (US);
Louis Lu-Chen Hsu, Fishkill, NY (US);
Jente B Kuang, Poughkeepsie, NY (US);
Somnuk Ratanaphanyarat, Poughkeepsie, NY (US);
Mary Joseph Saccamango, Poughquag, NY (US);
Hyun Jong Shin, Ridgefield, CT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An apparatus for controlling the ramp-up rate of a charge pump having an output providing an output voltage and an output current. In one embodiment, the apparatus comprises a current bleeder circuit having an input, an output adapted for connection to ground potential and at least one transistor having a gate, source, drain and body and defining at least one current path between the source and drain to form a current path between the input and output. The body is adapted for connection to the charge pump output. The apparatus further comprises a control circuit having an input adapted for connection to the charge pump output and an output connected to the bleeder circuit input. The control circuit provides a voltage potential to the input of the current bleeder circuit to control the gate-to-source voltage of the current bleeder circuit transistor. The flow of current through the current path of the current bleeder path is a function of the magnitude of the charge pump output and the gate-to-source voltage of the bleeder circuit transistor. Other embodiments of the apparatus of the present invention are described herein.