AN-1039

Application Note

Rev. 0 | Page 2 of 8

TABLE OF CONTENTS

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

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

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

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

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

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

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