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. 24, 2004
Filed:
Jul. 24, 2002
Method and apparatus for providing a supply voltage based on an envelope of a radio frequency signal
James E. Mitzlaff, Arlington Heights, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An envelope tracking amplification system that includes an envelope tracking power supply (ETPS) amplifies a radio frequency (RF) signal to produce a linearized amplified signal. The envelope tracking amplification system samples the RF signal to produce a sampled RF signal. The ETPS produces a control signal based on an instantaneous magnitude of the sampled RF signal and further based on an average magnitude of the sampled RF signal, produces multiple supply voltages, and, based on the control signal, couples a supply voltage of the multiple supply voltages to an output of the EPTS to produce an output supply voltage. The envelope tracking amplification system then amplifies the RF signal based on the output supply voltage to produce a highly linear amplified signal.