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. 17, 2015
Filed:
Nov. 29, 2011
Stuart Williams, Horsham, GB;
Brian Baxter, Greensboro, NC (US);
Brad Hunkele, Greensboro, NC (US);
Hirofumi Honjo, Palo Alto, CA (US);
Roman Zbigniew Arkiszewski, Oak Ridge, NC (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);
Stuart Williams, Horsham, GB;
Brian Baxter, Greensboro, NC (US);
Brad Hunkele, Greensboro, NC (US);
Hirofumi Honjo, Palo Alto, CA (US);
Roman Zbigniew Arkiszewski, Oak Ridge, NC (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 charge pump of a power amplifier (PA) bias power supply and a process to prevent undershoot disruption of a bias power supply signal of the PA bias power supply are disclosed. The charge pump operates in one of multiple bias supply pump operating modes, which include at least a bias supply pump-up operating mode and a bias supply bypass operating mode. The process prevents selection of the bias supply pump-up operating mode from the bias supply bypass operating mode before charge pump circuitry in the charge pump is capable of providing adequate voltage to prevent undershoot disruption of the bias power supply signal.