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. 01, 2010
Filed:
Jun. 22, 2006
Gordon G. Rabjohn, Ottawa, CA;
Johan Grundlingh, Kinburn, CA;
Edward J. Whittaker, Bishop's Stortford, GB;
Gordon G. Rabjohn, Ottawa, CA;
Johan Grundlingh, Kinburn, CA;
Edward J. Whittaker, Bishop's Stortford, GB;
SiGe Semiconductor Inc., Ottawa, Ontario, CA;
Abstract
A collector boost circuit is disclosed for providing a first voltage in a first mode of operation to a power amplifier, and another voltage in a second mode of operation to the power amplifier. The collector boost circuit uses an indicator signal derived by an RF detector to switch between the first and the second mode of operation. The another voltage is a boosted voltage greater than the first voltage and is provided when required during peak excursions to prevent amplifier clipping through a boost capacitor. The another voltage is continuous and varies in accordance with the detected peak signal amplitude.