公开(公告)号：US20040228416A1

公开(公告)日：2004-11-18

申请号：US10791181

申请日：2004-03-02

Applicant: Cirrus Logic, Inc.

Inventor： Jack Anderson ,  John Laurence Melanson

IPC: H04B014/06

CPC classification number: H03F3/2175 ,  H03F2200/331

Abstract: A delta-sigma modulator for driving an output stage is disclosed. The delta-sigma modulator operates between first and second voltages and includes a loop filter, a quantizer, and a feedback loop coupling an output of the quantizer and an input of the loop filter. The feedback loop includes compensation circuitry for compensating for variations in the first and second voltages in response to a measured average of the first and second voltages and a measured difference between the first and second voltages. Measuring circuitry measures the average and the difference of the first and second voltages.

Abstract translation: 公开了用于驱动输出级的Δ-Σ调制器。 Δ-Σ调制器在第一和第二电压之间工作，并且包括环路滤波器，量化器和耦合量化器的输出和环路滤波器的输入的反馈环路。 反馈回路包括补偿电路，用于响应于测量的第一和第二电压的平均值和第一和第二电压之间的测量的差值来补偿第一和第二电压的变化。 测量电路测量第一和第二电压的平均值和差值。