| 摘要 |
<p>A delta sigma modulator (340) of at least second order includes correction means (342, 344) applied to each feedback loop (54) in the modulator, to account for systemic nonlinear output distortions. Since the output distortion is nonlinear, the correction applied to each feedback loop is nontrivially different. Such a corrected delta sigma modulator may be used in a demodulator including an output digital to analog converter (DAC) (348) to account for systemic imperfections in the pulses formed by the DAC. The corrected delta sigma modulator is also useful in correcting output errors associated with high quality multilevel demodulators (350) and class D power amplifiers (360). The corrected delta sigma modulator may be one bit or multilevel.</p> |
