Patent ID: 7126421

Claim:
A method for automatically aligning a feed forward loop in a radio frequency power amplifier, the method comprising: applying a radio frequency signal to an input of the radio frequency power amplifier; splitting the radio frequency signal; communicating the radio frequency signal through both legs of one loop of the radio frequency power amplifier; combining radio frequency signals from both legs of the loop; monitoring the combined radio frequency signal from a selected point of the radio frequency power amplifier; and facilitating communication of a radio frequency signal from a signal cancellation loop delay to an error cancellation loop group delay adjuster to facilitate alignment of the signal cancellation loop of the radio frequency power amplifier, wherein said facilitating comprises closing a switch so as to facilitate communication of a radio frequency signal from a signal cancellation loop delay to an error cancellation loop group delay adjuster to facilitate alignment of the signal cancellation loop of the radio frequency power amplifier; wherein the selected point of the radio frequency power amplifier provides a signal representative of an output of the error cancellation loop group delay adjuster.