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:
Nov. 16, 2004
Filed:
Jul. 26, 2002
Lei Zhao, Chandler, AZ (US);
Anthony M. Pavio, Paradise Valley, AZ (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A balun and transformer system ( ) is provided in which a balun ( ) is cascaded between two 4:1 impedance transformers ( ) to form a 16:1 broadband impedance transformation for push-pull amplifier applications ( ). The balun ( ) is configured in a Marchand configuration. The balun and transformers ( ) are formed with coupled lines realized with a very thin layer of ceramic. Additional coupling between the gap in the balun ( ) is achieved by an embedded capacitor ( ) built in the balun's ceramic. DC bias supply ( ) to the power amplifier ( ) is achieved by using the hot plate of decoupling capacitors ( ), which serve as a floating ground plane to the whole application ( ).