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:
Jul. 23, 2002
Filed:
May. 23, 2001
El-Badawy Amien El-Sharawy, Gilbert, AZ (US);
National Scientific Corporation, Scottsdale, AZ (US);
Abstract
An integrated RF power amplifier includes an on-chip input transformer ( ) and an on-chip output transformer ( ). Each of the transformers ( ) is formed from four spirals. Each primary winding ( ) and each secondary winding ( ) includes positive and negative spirals arranged so that positive current rotates in opposing rotational directions in the positive and negative spirals. The secondary winding ( ) of the input transformer ( ) and the primary winding ( ) of the output transformer ( ) each has a center tap ( ) located at the electrical and physical center of the winding. Positive and negative amplifiers ( ) couple between the secondary winding of the input transformer ( ) and the primary winding of the output transformer ( ). DC biasing for the amplifiers ( ) is provided through the positive and negative spirals of the center-tapped windings ( ) from the respective center taps ( ).