| 摘要 |
<p>A noise shaper comprising a first feedback loop (306, 305, 301, 303) for noise shaping a first feedback signal under normal operating conditions including a first filter (301) having a first signal transfer function, a second feedback loop (308, 307, 302) that is stable under overload conditions and includes a second filter (208, 302) having a second signal transfer function differing from the first signal transfer function, a quantizer (303) having an input responsive to output of the first feedback loop, a limiter (309) having an input responsive to the outputs of the quantizer (303) and the second feedback loop, and steering circuitry (312, 309, 304, 303) for steering feedback from an output of the limiter (309) to inputs of the first and second feedback loops.The steering circuitry including a first output for providing the first feedback signal to the first feedback loop and a second output for providing a second feedback signal to the second feedback loop.</p> |
