| US 7,551,034 B2 | ||
| Saturation handling | ||
| Andrea Camuffo, Munich (Germany); Alexander Belitzer, Munich (Germany); and Andreas Langer, Unterschleissheim (Germany) | ||
| Assigned to Infineon Technologies AG, Neubiberg (Germany) | ||
| Filed on Jun. 25, 2007, as Appl. No. 11/768,172. | ||
| Prior Publication US 2008/0315956 A1, Dec. 25, 2008 | ||
| Int. Cl. H02H 7/20 (2006.01) | ||
| U.S. Cl. 330—298 [330/207 P] | 18 Claims |
| 1. A system comprising:
a power amplifier operable to output a signal;
a detector associated with the power amplifier and operable to detect the signal output by the power amplifier and, in response,
to generate a detector signal;
a power control loop to monitor the detector signal and to generate a power control signal in response to the signal output
by the detector, and being operable to control the output power of the signal output by the power amplifier, wherein the power
control loop includes a digital controller operable to generate the power control signal in response to the signal output
by the detector combined with a signal output by the saturation handler; and
a saturation handler associated with the power control loop, the saturation handler being operable to monitor the signal output
by the detector and the power control signal during implementations of the control loop and to prevent the power control signal
from placing the power amplifier into a saturation condition, the saturation handler operable to detect that the power amplifer
is approaching a saturation condition and to generate a copy of the signal output by the detector to be used as a target signal
output when the approaching saturation condition is detected.
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