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:
Jul. 02, 2002
Filed:
Jul. 10, 2001
Ravindra Ambatipudi, Milpitas, CA (US);
Mark Hartman, Santa Clara, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A method and apparatus is arranged to produce high precision output voltage matching in a multiple output power converter. A two-output voltage converter includes a positive and a negative voltage output that are approximately equal in magnitude. The power converter includes inductors, transfer capacitance circuitry, and a controlled switching circuit. In one operating mode, the switching circuit is closed, the inductors are charged, and energy from the input signal is stored in the transfer capacitance circuitry. In a second operating mode, the switching circuit is opened, and the stored energy is transferred to the output loads. The transfer capacitance circuitry is arranged to provide improved matching in the output voltages. The two-output power converter topology may be extended to provide multiple outputs.