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公开(公告)号:US07071752B2
公开(公告)日:2006-07-04
申请号:US10768365
申请日:2004-01-29
申请人: Venkateswar R. Kowkutla , Shifeng Zhao , Luis E. Ossa , Kenneth M. Bell , Anker Josefsen , Lars Risbo
发明人: Venkateswar R. Kowkutla , Shifeng Zhao , Luis E. Ossa , Kenneth M. Bell , Anker Josefsen , Lars Risbo
IPC分类号: G06F1/04
CPC分类号: H03M7/3008 , H03F3/2171 , H03F3/2173 , H03M7/3042
摘要: A digital amplifier includes a noise shaper and a dither generator arranged to introduce noise to the shaper. The generator uses a seed value derived from a state variable of the shaper.
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公开(公告)号:US07034609B2
公开(公告)日:2006-04-25
申请号:US10712746
申请日:2003-11-12
申请人: Lars Risbo , Anker Josefsen
发明人: Lars Risbo , Anker Josefsen
IPC分类号: H03F3/38
CPC分类号: H03F3/217 , H03F3/45085 , H03F2203/45636
摘要: A technique to implement removal of dead time control circuitry from the back-end of a digital switching amplifier system 100 and add dead time control circuitry on the front-end digital modulator chip. The front-end dead time control circuitry adaptively adjusts timing of the output PWM control signals 124 to optimize performance and power consumption, i.e. operate with minimum dead time for all transitions. The front-end dead time control circuitry controls all propagation delays associated with the digital switching amplifier system 100.
摘要翻译: 一种实现从数字开关放大器系统100的后端去除死区时间控制电路并在前端数字调制器芯片上增加死区时间控制电路的技术。 前端死区时间控制电路自适应地调节输出PWM控制信号124的定时,以优化性能和功耗,即以最小死区时间进行所有转换。 前端死区时间控制电路控制与数字开关放大器系统100相关联的所有传播延迟。
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公开(公告)号:US20050099226A1
公开(公告)日:2005-05-12
申请号:US10712746
申请日:2003-11-12
申请人: Lars Risbo , Anker Josefsen
发明人: Lars Risbo , Anker Josefsen
CPC分类号: H03F3/217 , H03F3/45085 , H03F2203/45636
摘要: A technique to implement removal of dead time control circuitry from the back-end of a digital switching amplifier system 100 and add dead time control circuitry on the front-end digital modulator chip. The front-end dead time control circuitry adaptively adjusts timing of the output PWM control signals 124 to optimize performance and power consumption, i.e. operate with minimum dead time for all transitions. The front-end dead time control circuitry controls all propagation delays associated with the digital switching amplifier system 100.
摘要翻译: 一种实现从数字开关放大器系统100的后端去除死区时间控制电路并在前端数字调制器芯片上增加死区时间控制电路的技术。 前端死区时间控制电路自适应地调节输出PWM控制信号124的定时,以优化性能和功耗,即以最小死区时间进行所有转换。 前端死区时间控制电路控制与数字开关放大器系统100相关联的所有传播延迟。
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