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:
Feb. 10, 2004
Filed:
Jul. 29, 1999
Marko Pellonperä, Tampere, FI;
Nokia Telecommunications Oy, Espoo, FI;
Abstract
A method of compensating delay in an linearization loop of a power amplifier and a linearization arrangement of a power amplifier, which arrangement includes an I/Q modulator, one or more power amplifiers to be linearized and generating delay, and a feedback loop including an I/Q demodulator when the I/Q modulator and the I/Q demodulator derive an oscillator frequency from the same local oscillator. In accordance with the invention, the delay generated the power amplifier in the feedback is compensated by delaying a local oscillator signal applied to the I/Q demodulator. The delay of the local oscillator signal applied to the I/Q demodulator is generated by an amplifier optimized to have a great delay, preferably by a small-signal amplifier.