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:
Oct. 18, 2005
Filed:
Aug. 26, 2002
Erez Sarig, Migdal Haemek, IL;
Ran Rosenweig, Midgal Haemek, IL;
Erez Sarig, Migdal Haemek, IL;
Ran Rosenweig, Midgal Haemek, IL;
Tower Semiconductor Ltd., Migdal Haemek, IL;
Abstract
A voltage control circuit that utilizes a level-shifter circuit and a switch circuit to isolate a charge pump output terminal from a system voltage source when a charge pump is enabled, and to couple the charge pump output terminal to the system voltage source when the charge pump is disabled. The level-shifter circuit receives the charge pump output voltage as its high voltage supply and the charge pump enable signal as its input signal, and transmits the charge pump output voltage from its output terminal when the charge pump is enabled, and zero volts when the charge pump is disabled. The switch circuit includes a PMOS transistor constructed such that its bulk and source are connected to the charge pump output terminal, and its drain is connected to the system voltage source. The switch circuit also includes a guard ring structure surrounding the PMOS transistor.