发明名称 |
MODULATION OF A DIGITAL INPUT SIGNAL USING A DIGITAL SIGNAL MODULATOR AND SIGNAL SPLITTING |
摘要 |
A digital signal modulator modulates a digital input signal to drive a load, such as an opposed current amplifier or other opposed current converter. The combinations of frequency relationships and digital signal modulator elements provide significant digital signal processing capabilities and flexible output signal timing. In one embodiment, a digital signal modulator modulates a digital input signal. Even and odd samples of the input signal propagate along two respective channels (signal paths), which include further digital processing capabilities, such as pulse width modulation, to generate output signals appropriate for the topology of a load. Additionally, a bias signal may be modulated with the digital input signal. By utilizing digital signal processing to modulate the input signal, various processing technologies are applied to the input signal. For example, noise shaping may be implemented using a delta-sigma modulator as an input stage to the two channels. |
申请公布号 |
WO2004059848(A2) |
申请公布日期 |
2004.07.15 |
申请号 |
WO2003US40219 |
申请日期 |
2003.12.18 |
申请人 |
CIRRUS LOGIC, INC.;MELANSON, JOHN;ANDERSON, JACK;CHORN, MICHAEL |
发明人 |
MELANSON, JOHN;ANDERSON, JACK;CHORN, MICHAEL |
分类号 |
H02M3/157;H02M3/158;H03F3/217;H03K7/08 |
主分类号 |
H02M3/157 |
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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