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:
Jun. 03, 2008
Filed:
Jan. 18, 2006
Thomas R. Apel, Portland, OR (US);
Thomas R. Apel, Portland, OR (US);
TriQuint Semiconductor, Inc., Hillsboro, OR (US);
Abstract
A switched distributed power amplifier includes an amplifier stage that includes a first amplifier subsection and a second amplifier subsection, both including one or more field effect transistors (FETs). Each FET in the first amplifier subsection is coupled to a radio frequency (RF) input terminal. Each FET in the second amplifier subsection is coupled to the RF input terminal through an input delay element, which includes a first inductor, a first capacitance associated with gates of the FETs in the first amplifier subsection, a second capacitance associated with gates of the FETs in the second amplifier subsection, and a third capacitance associated with a capacitor coupled to the RF input terminal. The input delay element is designed such that the sum of the first and third capacitances is equal to the second capacitance. A shunt switch prevents the second amplifier subsection from turning on during a low power mode.