| 摘要 |
<p>A distortion compensating amplifier (100) comprises a forward path (104-114) and a feedback path (144-150). The gain setting of the forward path is controlled (108) by the output signal of a gain adjusting unit (120) which output signal is also coupled via an A/D converter (166) to a CPU (174). When the gain setting is changed, the CPU detects this alteration and stops the process of updating the LUT parameter in the LUT (134). Then, based on an integrated value of the forward signal (172) and an integrated value of the feedback signal (164), the CPU computes a new feedback gain coefficient that is stored (162). After the computation of this new feedback gain coefficient, the CPU instructs the LUT unit (134) to resume the process of updating the LUT parameter.</p> |
