| 摘要 |
A reduced phase error derotator (100) includes a novel phase accumulator (12), which provides an output signal (38) having a value which approaches zero when the value of the phase accumulator input signal (34) is zero. This is particularly advantageous in situations wherein a sudden phase transient appears at the input of the phase accumulator (12) causing the phase accumulator input signal (34) to become nonzero, the phase accumulator (12) will quickly react to this transient, resulting in the value of the phase accumulator output signal (38) to be nonzero. When the transient at the input to the phase accumulator (12) disappears and the value of the phase accumulator input signal (34) returns to zero, the phase accumulator (12) will quickly react to this change resulting in the value of the phase accumulator output signal (38) becoming zero. Furthermore, in demodulators having components coupled to the derotator (100), this derotator (100) alleviates the need for these components to compensate for phase differences between signals coupled to these components and the phase accumulator output signal (38). |
