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:
May. 16, 1989
Filed:
Jun. 08, 1987
Applicant:
Inventors:
Thomas Hudspeth, Malibu, CA (US);
David S Kaplan, Torrance, CA (US);
Harold A Rosen, Santa Monica, CA (US);
Assignee:
Hughes Aircraft Company, Los Angeles, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03F / ; H03F / ;
U.S. Cl.
CPC ...
330 10 ; 3301 / ; 330295 ;
Abstract
A high efficiency envelope amplifier is disclosed. The invention includes a power supply, a comparator and several switches. The power supply is capable of providing multiple outputs. The comparator measures the amplitude of an input signal against one of several threshold levels. When the input signal is within a predetermined range, a selected power supply output is switched incrementally switches small amounts of power, switching losses are substantially mitigated.