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:
Apr. 17, 2012
Filed:
May. 21, 2010
Peter M. Asbeck, Del Mar, CA (US);
Donald Kimball, San Diego, CA (US);
Jinseong Jeong, Plano, TX (US);
Peter M. Asbeck, Del Mar, CA (US);
Donald Kimball, San Diego, CA (US);
Jinseong Jeong, Plano, TX (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
An embodiment of the invention is a method of generating a reduced bandwidth envelope signal V(t) for the power supply modulator of an RF amplifier. An envelope signal of an RF amplifier input V(t) is low pass filtered. The filtered envelope signal is subtracted from the envelope signal to obtain a difference signal, which is rectified to produce a residue signal. The residue signal is low pass filtered and added back into the filtered envelope signal. An iterative process of the rectifying, low pass filtering the residue signal adding it back is continued until a condition of V(t)≧V(t) is met. Another embodiment provides a method of generating a reduced bandwidth envelope signal V(t) for the power supply modulator of an RF amplifier. An envelope signal of an RF amplifier input V(t) is low pass filtered. The filtered envelope signal is subtracted from the envelope signal to obtain a difference signal, which is rectified to produce a residue signal. The residue signal is low pass filtered and multiplied by a first constant that is greater than one, and then added back into the filtered envelope signal. A second constant is added into the filtered envelope signal so that the condition V(t)≧V(t) is met.