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. 29, 2013
Filed:
Nov. 04, 2011
Jean-christophe Berchtold, Carlsbad, CA (US);
Joseph Hubert Colles, Bonsall, CA (US);
David E. Jones, Cedar Rapids, IA (US);
Chris Levesque, Fountain Valley, CA (US);
William David Southcombe, San Diego, CA (US);
Scott Yoder, Fuquay Varina, NC (US);
Terry J. Stockert, Cedar Rapids, IA (US);
Jean-Christophe Berchtold, Carlsbad, CA (US);
Joseph Hubert Colles, Bonsall, CA (US);
David E. Jones, Cedar Rapids, IA (US);
Chris Levesque, Fountain Valley, CA (US);
William David Southcombe, San Diego, CA (US);
Scott Yoder, Fuquay Varina, NC (US);
Terry J. Stockert, Cedar Rapids, IA (US);
RF Micro Devices, Inc., Greensboro, NC (US);
Abstract
A sample-and-hold (SAH) current estimating circuit and a first switching power supply are disclosed. The first switching power supply provides a first switching power supply output signal based on a series switching element and a setpoint. The SAH current estimating circuit samples a voltage across the series switching element of the first switching power supply during an ON state of the series switching element and during a ramping signal peak to provide an SAH output signal based on an estimate of an output current of the first switching power supply output signal. The first switching power supply selects the ON state of the series switching element, such that during the ramping signal peak, the series switching element has a series current having a magnitude, which is about equal to a magnitude of the output current of the first switching power supply output signal.