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AD8346_

Correcting Imperfections in IQ Modulators to Improve RF Signal Fidelity

Analog Devices 

AN-1039

TABLE OF CONTENTS

Introduction ...................................................................................... 1

A Typical Wireless Transmitter ...................................................... 1

Modulator Imperfections ............................................................ 3

Correcting Modulator Imperfections ........................................ 4

Factory Calibration ...................................................................... 4

Calibration Procedure.................................................................. 6

Application Note

Correcting for Quadrature and I/Q Gain Errors ......................6

Frequency Variations ....................................................................7

Post Calibration Temperature Drift ............................................7

Calibration vs. Time......................................................................7

Complex Modulation....................................................................8

Conclusions ....................................................................................8

Rev. 0 | Page 2 of 8

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