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1. 发明申请

US20050116849A1 Feedback steering delta-sigma modulators and systems using the same 有权
公开(公告)号：US20050116849A1
公开(公告)日：2005-06-02
申请号：US10379742
申请日：2003-03-05
申请人： John Melanson , Xiaofan Fei , Johann Gaboriau
发明人： John Melanson , Xiaofan Fei , Johann Gaboriau
IPC分类号： H03M20060101 , H03M3/00 , H03M7/32 , H03M7/34 , H03M7/36 , H03M7/38 , H03M1/56
CPC分类号： H03M7/3006 , H03M7/3011 , H03M7/3026 , H03M7/3033 , H03M7/3037
摘要： A digital to analog converter including an input for receiving an input signal, a ramp generator, and a delta-sigma modulator responsive to the input signal and an output of the ramp generator. An order of a noise shaping transfer function of the delta-sigma modulator is response to a level of the output of the ramp generator.

2. 发明授权

US06972705B1 Signal processing system having an ADC delta-sigma modulator with single-ended input and feedback signal inputs 有权
标题翻译：信号处理系统具有具有单端输入和反馈信号输入的ADCΔ-Σ调制器
公开(公告)号：US06972705B1
公开(公告)日：2005-12-06
申请号：US11011732
申请日：2004-12-14
申请人： Xiaofan Fei , Johann Gaboriau , John L. Melanson
发明人： Xiaofan Fei , Johann Gaboriau , John L. Melanson
IPC分类号： H03M3/00 , H03M3/04
CPC分类号： H03M3/39 , H03M3/424 , H03M3/452
摘要： Signal processing systems described herein include an analog-to-digital delta sigma modulator to process a single-ended input signal using a single-ended analog feedback reference signal. The delta sigma modulator includes a switched capacitor circuit that integrates a difference between the single-ended input signal and the single-ended analog feedback signal derived from a quantization output of the delta sigma modulator. Embodiments of the switched capacitor circuit allow the delta sigma modulator to be implemented with fewer switches, less complicated reference signal generators, and smaller capacitors relative to conventional counterparts. Thus, embodiments of the delta sigma modulator described herein can cost less to build and use less power. Embodiments of the signal processing systems can be implemented in single and multi-bit delta sigma modulators and various sampling topologies, including single and double sampling topologies.
摘要翻译：本文描述的信号处理系统包括使用单端模拟反馈参考信号来处理单端输入信号的模数转换ΔΣ调制器。 ΔΣ调制器包括开关电容器电路，其对单端输入信号和从Δ-Σ调制器的量化输出得到的单端模拟反馈信号之间的差进行积分。开关电容器电路的实施例允许使用更少的开关，较不复杂的参考信号发生器和相对于常规对应物的较小电容器来实现Δ-Σ调制器。因此，本文描述的Δ-Σ调制器的实施例可以降低构建和使用较少功率的成本。信号处理系统的实施例可以在单位和多位ΔΣ调制器和各种采样拓扑中实现，包括单采样和双采样拓扑。

3. 发明授权

US06538590B1 Transient noise reduction circuits, systems and methods in power digital-to-analog converters 有权
标题翻译：功率数模转换器中的瞬态降噪电路，系统和方法
公开(公告)号：US06538590B1
公开(公告)日：2003-03-25
申请号：US09825080
申请日：2001-04-02
申请人： Johann Guy Gaboriau , Eric Walburger , John Laurence Melanson , Xiaofan Fei
发明人： Johann Guy Gaboriau , Eric Walburger , John Laurence Melanson , Xiaofan Fei
IPC分类号： H03M166
CPC分类号： H03F3/2173 , H03F3/2171 , H03F2200/331 , H03M1/0881 , H03M1/822
摘要： A system for suppressing transient noise in switched-mode amplifier systems is disclosed. An amplifier, for amplifying a signal from a digital signal source includes a first complementary metal oxide semiconductor field effect transistor (MOSFET) pair. A common node of the pair is serially coupled to an output node of the amplifier by a resistor. The first MOSFET pair is configured to drive a ramp on the output node of the amplifier.
摘要翻译：公开了一种用于抑制开关式放大器系统中的瞬态噪声的系统。用于放大来自数字信号源的信号的放大器包括第一互补金属氧化物半导体场效应晶体管（MOSFET）对。该对的公共节点通过电阻器串联耦合到放大器的输出节点。第一个MOSFET对被配置为驱动放大器的输出节点上的斜坡。

4. 发明申请

US20110075723A1 Thermal Feedback for Switch Mode Amplification 有权
标题翻译：开关模式放大的热反馈
公开(公告)号：US20110075723A1
公开(公告)日：2011-03-31
申请号：US12909262
申请日：2010-10-21
申请人： John L. Melanson , Xiaofan Fei , Johann G. Gaboriau , Steven Green , Jason P. Rhode , Eric Walburger , Wilson E. Taylor, JR.
发明人： John L. Melanson , Xiaofan Fei , Johann G. Gaboriau , Steven Green , Jason P. Rhode , Eric Walburger , Wilson E. Taylor, JR.
IPC分类号： H03K9/08
CPC分类号： H03F3/2175 , H03F1/52 , H03F3/2173 , H03F2200/331 , H03F2200/447
摘要： A thermal sensor at the output of a switching amplifier senses heat dissipation at the output switch. If an overheating condition is sensed, gain of the digital input signal is lowered to reduce output power of the audio output signal.
摘要翻译：开关放大器输出端的热传感器感测输出开关的散热。如果感测到过热状况，数字输入信号的增益被降低以降低音频输出信号的输出功率。

5. 发明授权

US06462690B1 Circuit systems and methods for multirate digital-to-analog amplifier systems 有权
标题翻译：多速率数模转换放大器系统的电路系统和方法
公开(公告)号：US06462690B1
公开(公告)日：2002-10-08
申请号：US09825445
申请日：2001-04-02
申请人： Johann Guy Gaboriau , Xiaofan Fei , Evan Logan Marchman , Jason Powell Rhode
发明人： Johann Guy Gaboriau , Xiaofan Fei , Evan Logan Marchman , Jason Powell Rhode
IPC分类号： H03M166
CPC分类号： H03M3/502
摘要： A multirate digital-to-analog amplifier system is disclosed. An interpolator is configured to interpolate digital values between samples of a digital signal from a digital signal source, in which the digital signal has a first sample rate. An output signal from the interpolator has a second, predetermined sample rate, which is independent of the first sample rate, of the digital signal. An amplifier is configured to amplify a digital signal having the second sample rate in response to the output signal of the interpolator.
摘要翻译：公开了一种多速率数模转换放大器系统。内插器被配置为在来自数字信号源的数字信号的采样之间内插数字值，其中数字信号具有第一采样率。来自内插器的输出信号具有与数字信号的第一采样速率无关的第二预定采样速率。放大器被配置为响应于内插器的输出信号放大具有第二采样率的数字信号。

6. 发明授权

US07840015B1 Thermal feedback for switch mode amplification 有权
标题翻译：开关模式放大的热反馈
公开(公告)号：US07840015B1
公开(公告)日：2010-11-23
申请号：US10234896
申请日：2002-09-04
申请人： John L. Melanson , Xiaofan Fei , Johann G. Gaboriau , Steven Green , Jason P. Rhode , Eric Walburger , Wilson E. Taylor, Jr.
发明人： John L. Melanson , Xiaofan Fei , Johann G. Gaboriau , Steven Green , Jason P. Rhode , Eric Walburger , Wilson E. Taylor, Jr.
IPC分类号： H03G3/00 , H03G3/20 , H03F3/38
CPC分类号： H03F3/2175 , H03F1/52 , H03F3/2173 , H03F2200/331 , H03F2200/447
摘要： A thermal sensor at the output of a switching amplifier senses heat dissipation at the output switch. If an overheating condition is sensed, gain of the digital input signal is lowered to reduce output power of the audio output signal.
摘要翻译：开关放大器输出端的热传感器感测输出开关的散热。如果感测到过热状况，数字输入信号的增益被降低以降低音频输出信号的输出功率。

7. 发明授权

US07055045B1 Automatic mode detection circuits for configuring a terminal as an output terminal in a first mode as an input terminal in a second mode 有权
标题翻译：自动模式检测电路，用于在第一模式中将端子配置为输出端作为第二模式中的输入端
公开(公告)号：US07055045B1
公开(公告)日：2006-05-30
申请号：US10329853
申请日：2002-12-26
申请人： Johann G. Gaboriau , Xiaofan Fei
发明人： Johann G. Gaboriau , Xiaofan Fei
IPC分类号： G06F1/30 , H01L25/00 , G01R31/28
CPC分类号： G06F1/04
摘要： Mode detection circuitry includes first detection circuitry which detects the presence of a first input signal selectively presented at a first terminal for a first selected time duration and, in response, selectively generating a first control signal indicative of a first mode. Second detection circuitry detects the presence of a second input signal selectively presented at a second terminal for a second selected time duration and, in response, selectively generating a second control signal indicative of a second mode. Control circuitry configures the second terminal as an output terminal in the first mode and as an input terminal in the second mode in response to the first and second control signals.
摘要翻译：模式检测电路包括第一检测电路，其检测在第一选定持续时间内选择性地呈现在第一终端处的第一输入信号的存在，并且作为响应，选择性地产生指示第一模式的第一控制信号。第二检测电路检测在第二选择的持续时间内选择性地呈现在第二终端的第二输入信号的存在，并且作为响应，选择性地产生指示第二模式的第二控制信号。响应于第一和第二控制信号，控制电路将第二端子配置为第一模式中的输出端子和第二模式中的输入端子。

8. 发明授权

US06765436B1 Power supply based audio compression for digital audio amplifier 有权
公开(公告)号：US06765436B1
公开(公告)日：2004-07-20
申请号：US10234893
申请日：2002-09-04
申请人： John L. Melanson , Xiaofan Fei , Johann G. Gaboriau , Steven Green , Jason P. Rhode
发明人： John L. Melanson , Xiaofan Fei , Johann G. Gaboriau , Steven Green , Jason P. Rhode
IPC分类号： H03F338
CPC分类号： H03G7/007 , H03F3/181 , H03F3/217 , H03F2200/03 , H03F2200/331 , H03F2200/351 , H03G3/3089
摘要： A gain control at the input monitors an input signal and a supply voltage, which drives an output. The gain control adjusts the gain to compress the input signal when the supply voltage decreases in magnitude and/or the input signal is of such magnitude to cause the supply voltage to decrease.

9. 发明授权

US06556159B1 Variable order modulator 有权
标题翻译：可变阶调制器
公开(公告)号：US06556159B1
公开(公告)日：2003-04-29
申请号：US09954776
申请日：2001-09-17
申请人： Xiaofan Fei , Johann G. Gaboriau , John Laurence Melanson
发明人： Xiaofan Fei , Johann G. Gaboriau , John Laurence Melanson
IPC分类号： H03M300
CPC分类号： H03M7/3011 , H03M7/3026 , H03M7/3037 , H03M7/304
摘要： A delta-sigma modulator 400 includes circuitry 407 for selectively varying an order of the modulator to vary a modulation index of the delta sigma modulator.
摘要翻译： Δ-Σ调制器400包括用于选择性地改变调制器的阶数以改变Δ-Σ调制器的调制指数的电路407。

10. 发明授权

US08447050B2 Thermal feedback for switch mode amplification 有权
标题翻译：开关模式放大的热反馈
公开(公告)号：US08447050B2
公开(公告)日：2013-05-21
申请号：US12909262
申请日：2010-10-21
申请人： John L. Melanson , Xiaofan Fei , Johann G. Gaboriau , Steven Green , Jason P. Rhode , Eric Walburger , Wilson E. Taylor, Jr.
发明人： John L. Melanson , Xiaofan Fei , Johann G. Gaboriau , Steven Green , Jason P. Rhode , Eric Walburger , Wilson E. Taylor, Jr.
IPC分类号： H03F99/00 , H03F3/38
CPC分类号： H03F3/2175 , H03F1/52 , H03F3/2173 , H03F2200/331 , H03F2200/447
摘要： A thermal sensor at the output of a switching amplifier senses heat dissipation at the output switch. If an overheating condition is sensed, gain of the digital input signal is lowered to reduce output power of the audio output signal.
摘要翻译：开关放大器输出端的热传感器感测输出开关的散热。如果感测到过热状况，数字输入信号的增益被降低以降低音频输出信号的输出功率。

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