Invention Application
- Patent Title: Delta-sigma amplifiers with output stage supply voltage variation compensations and methods and digital amplifier systems using the same
- Patent Title (中): 具有输出级电源电压变化补偿的三角Σ放大器和使用其的数字放大器系统
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Application No.: US10791181Application Date: 2004-03-02
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Publication No.: US20040228416A1Publication Date: 2004-11-18
- Inventor: Jack Anderson , John Laurence Melanson
- Applicant: Cirrus Logic, Inc.
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Main IPC: H04B014/06
- IPC: H04B014/06
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.
Public/Granted literature
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