Patent ID: 7469130
Filing Date: 2008-12-23
Classification: H03F,H04L

Abstract:
1. A polar modulator, comprising: an output; a first input configured to receive an amplitude modulation signal connected to a first signal path; a second input configured to receive a phase modulation signal connected to a second signal path; a converter having a first input, a second input, a first tap, and a second tap forming the converter output, wherein the converter is configured to output a radio-frequency signal derived from the phase modulation signal and the amplitude modulation signal to the second tap, wherein the first input of the converter is connected to the first signal path, and the second input is connected to the second signal path; a feedback path comprising a level detector configured to measure a power of a signal and generate a signal in response thereto, comprising an input connected to at least one of the first and second taps of the converter; and a correction device having an input connected to an output of the level detector, and an output configured to output an amplitude correction signal to the first signal path on the basis of the signal output by the level detector.