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:
Jun. 23, 2015
Filed:
Jun. 07, 2012
Robert Lorenz, Menlo Park, CA (US);
Sumant Ranganathan, Saratoga, CA (US);
Xinyu Yu, San Jose, CA (US);
Sriraman Dakshinamurthy, San Jose, CA (US);
Robert Lorenz, Menlo Park, CA (US);
Sumant Ranganathan, Saratoga, CA (US);
Xinyu Yu, San Jose, CA (US);
Sriraman Dakshinamurthy, San Jose, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
Embodiments provide systems and methods for aligning the supply voltage signal applied to a power amplifier (PA) with the radio frequency (RF) output signal of the PA in a wireless device. The RF output signal is generated by applying a transmit signal to a transmit path of the wireless device. The supply voltage is generated by applying an envelope tracking (ET) signal, based on the transmit signal, to an envelope tracking (ET) path of the wireless device. Embodiments operate by estimating the delays of the ET path and the transmit path, and then controlling a relative delay between the transmit signal and the ET signal accordingly. In an embodiment, estimation of the delays of the ET path and the transmit path is done by correlating respective signals of each path.