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:
Jan. 10, 2012
Filed:
Sep. 24, 2009
John Pierdomenico, Temple, PA (US);
Zoltan Frasch, Hooksett, NH (US);
Charly El-khoury, Woburn, MA (US);
John Pierdomenico, Temple, PA (US);
Zoltan Frasch, Hooksett, NH (US);
Charly El-Khoury, Woburn, MA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
An amplifier system with digital adaptive power boost includes a charge pump for providing a power supply to an amplifier. The charge pump may switch between a fixed input DC voltage and a boosted value for a certain period of time in response to an increase in an input signal to the amplifier. The charge pump may use a switching transistor which is switched on only when the input signal to the amplifier exceeds a threshold. The amplifier system may be used for envelope tracking, especially for envelope tracking of low duty cycle signals, e.g., xDSL or vDSL.