发明名称 |
Delta-sigma amplifiers with output stage supply voltage variation compensations and methods and digital amplifier systems using the same |
摘要 |
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.
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申请公布号 |
US6943620(B2) |
申请公布日期 |
2005.09.13 |
申请号 |
US20040791181 |
申请日期 |
2004.03.02 |
申请人 |
CIRRUS LOGIC, INC. |
发明人 |
ANDERSEN JACK;MELANSON JOHN LAURENCE |
分类号 |
H03F3/217;(IPC1-7):H03F3/38 |
主分类号 |
H03F3/217 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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