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. 29, 2012
Filed:
Aug. 28, 2008
Don L. Landt, Palo, IA (US);
Christopher Kalmar, Hiawatha, IA (US);
Don L. Landt, Palo, IA (US);
Christopher Kalmar, Hiawatha, IA (US);
Rockwell Collins, Inc., Cedar Rapids, IA (US);
Abstract
A power amplifier comprising a distributed signal pre-driver, an AM Modulation Driver and a Switch Power Supply driving optically-powered and optically-switched GaN-based switches which are stacked and operated in a complementary fashion and are amplitude modulated using optically-powered and optically-switched charge pumps to produce the modulated rail voltages which in turn produces the desired AM signal modulation controlled by a high-speed feedback. The optically-coupled, isolated switching elements, OCIS, provide inherent isolation between switching devices and between stacked, switching devices and ground thus enabling true switch behavior of each switching element which is independent of the other elements and independent of the voltage conditions on the switched terminals. In the preferred embodiment most of the devices are formed using Aluminum-Gallium-Nitride/Gallium-Nitride HEMTs on a monolithic microwave integrated circuit device.