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:
Sep. 10, 2002
Filed:
Apr. 13, 2000
Applicant:
Inventors:
Tirdad Sowlati, Ossining, NY (US);
Sifen Luo, Hartsdale, NY (US);
Assignee:
Koninklijke Philips Electronics N.V., New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03G 3/10 ; H03G 3/20 ; H03F 3/16 ;
U.S. Cl.
CPC ...
H03G 3/10 ; H03G 3/20 ; H03F 3/16 ;
Abstract
A power amplifier circuit for amplifying an input signal includes an amplifying transistor and a power detection circuit. The power detection circuit includes a circuit for generating a signal which is directly proportional to the power level in the amplifying transistor. This may-be accomplished by generating a voltage proportional to the square of a current in the amplifying transistor and then averaging that voltage. In this manner, a more accurate indication of the power level in the amplifying transistor is obtained.