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:
Aug. 13, 2019
Filed:
Mar. 20, 2012
Charles Edward Wheatley, Iii, Del Mar, CA (US);
Zhen Ning Low, San Diego, CA (US);
Stanley Slavko Toncich, San Diego, CA (US);
Ngo Van Nguyen, San Diego, CA (US);
Cody B. Wheeland, San Diego, CA (US);
Charles Edward Wheatley, III, Del Mar, CA (US);
Zhen Ning Low, San Diego, CA (US);
Stanley Slavko Toncich, San Diego, CA (US);
Ngo Van Nguyen, San Diego, CA (US);
Cody B. Wheeland, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
This disclosure provides systems, methods and apparatus for increasing the efficiency of an amplifier when driven by a variable load. In one aspect a transmitter device is provided. The transmitter device includes a driver circuit characterized by an efficiency. The driver circuit is electrically connected to a transmit circuit characterized by an impedance. The transmitter device further includes a filter circuit electrically connected to the driver circuit and configured to modify the impedance to maintain the efficiency of the driver circuit at a level that is within 20% of a maximum efficiency of the driver circuit. The impedance is characterized by a complex impedance value that is within a range defined by a real first impedance value and a second real impedance value. A ratio of the first real impedance value to the second real impedance value is at least two to one.