Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2007-03-22
2010-12-07
Kim, Kevin Y (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
Reexamination Certificate
active
07848450
ABSTRACT:
Methods and apparatus to pre-compensate for in-phase/quadrature (I/Q) distortion in quadrature transmitters are disclosed. A disclosed example method comprises coupling a portion of an analog baseband in-phase signal to an analog baseband quadrature signal through an impedance, and selecting a resistance value for the impedance to pre-distort the analog baseband quadrature signal to compensate for an error introduced by modulation of the analog baseband in-phase signal and the analog baseband quadrature signal.
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Arnold Michael James
Dantoni Francesco
Jaganathan Shrinivasan
Brady III Wade J.
Kim Kevin Y
Patti John J.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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