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:
May. 20, 2003
Filed:
Aug. 28, 2000
Claude Renous, Grenoble, FR;
STMicroelectronics S.A., Gentilly, FR;
Abstract
A power supply circuit receiving several supply voltages on respective switches, at least one of the switches being a first PMOS transistor connected between one of the supply voltages and a common output terminal, this switch being associated with a second PMOS transistor connected between the gate of the first transistor and a power supply node maintained at the highest of the other supply voltages, with a third NMOS transistor, which is less conductive in the on state than the second transistor, connected between the gate of the first transistor and the ground, and with a fourth PMOS transistor having its source connected to the power supply line of the switch and its drain connected to ground via a current source, and to the gates of the second, third, and fourth transistors.