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. 08, 2009
Filed:
Jun. 29, 2005
John B. Groe, Poway, CA (US);
Joseph Austin, San Diego, CA (US);
Naone Farias, San Diego, CA (US);
Carrie Lo, Irvine, CA (US);
John B. Groe, Poway, CA (US);
Joseph Austin, San Diego, CA (US);
Naone Farias, San Diego, CA (US);
Carrie Lo, Irvine, CA (US);
Sequoia Communications, San Diego, CA (US);
Abstract
A direct synthesis transmitter. A very efficient and highly linear direct synthesis transmitter is provided that can be used to directly synthesize and transmit any type of modulated signal. The direct synthesis transmitter includes a phase-locked loop (PLL) with controls phase modulation plus an accompanying variable gain amplifier for amplitude modulation. Also included is a system to align the phase and amplitude modulation signals. A transmitter constructed in accordance with the present invention is very efficient and suitable for use in portable radio equipment.