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1. 发明授权

US06933871B2 Feedback steering delta-sigma modulators and systems using the same 有权
标题翻译：反馈转向Δ-Σ调制器和使用它的系统
公开(公告)号：US06933871B2
公开(公告)日：2005-08-23
申请号：US10379742
申请日：2003-03-05
申请人： John Laurence Melanson , Xiaofan Fei , Johann G. Gaboriau
发明人： John Laurence Melanson , Xiaofan Fei , Johann G. Gaboriau
IPC分类号： H03M20060101 , H03M3/00 , H03M7/32 , H03M7/34 , H03M7/36 , H03M7/38
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.
摘要翻译：数模转换器，包括用于接收输入信号的输入端，斜坡发生器和响应于输入信号和斜坡发生器输出的Δ-Σ调制器。 Δ-Σ调制器的噪声整形传递函数的顺序响应于斜坡发生器的输出电平。

2. 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。

3. 发明授权

US06853242B2 Power supply based audio compression for digital audio amplifier 有权
标题翻译：数字音频放大器的基于电源的音频压缩
公开(公告)号：US06853242B2
公开(公告)日：2005-02-08
申请号：US10867264
申请日：2004-06-14
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： H03M7/32 , H03F1/32 , H03F3/181 , H03F3/217 , H03G3/30 , H03G7/00 , H03F3/04 , H03F3/38
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.
摘要翻译：输入端的增益控制器监视输入信号和驱动输出的电源电压。当电源电压幅度减小时，增益控制调节增益以压缩输入信号，和/或输入信号具有这样的大小，从而使电源电压降低。

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

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。

6. 发明授权

US06522278B1 Digital-to-analog converter with power up/down transient suppression and automatic rate switching 有权
标题翻译：具有上电/下拉瞬变抑制和自动速率切换功能的数模转换器
公开(公告)号：US06522278B1
公开(公告)日：2003-02-18
申请号：US10078824
申请日：2002-02-19
申请人： Jason P. Rhode , Johann G. Gaboriau , Xiaofan Fei
发明人： Jason P. Rhode , Johann G. Gaboriau , Xiaofan Fei
IPC分类号： H03M166
CPC分类号： H03M1/0881 , H03M1/822
摘要： Power-up and power-down transient suppression are provided for an audio digital-to-analog converter with a single ended output to prevent annoying pops which accompany switching an audio system on and off. Power-up suppression is achieved by driving the output of a pulse-width circuit to a reference level such as around, and driving the pulse-width circuit gradually to its quiescent (zero signal) value. Power-down suppression is provided by using a positive feedback amplifier to accelerate current drain initiated by a constant current source used to bleed off the charge on output capacitor. The techniques disclosed apply readily to the outputs received from CDs, CD-ROMs, DAT and other digital recording media.
摘要翻译：为具有单端输出的音频数/模转换器提供上电和掉电瞬态抑制，以防止伴随音频系统开启和关闭的烦人的弹出。通过将脉冲宽度电路的输出驱动到诸如周围的参考电平并且逐渐将脉冲宽度电路驱动到其静态（零信号）值来实现上电抑制。通过使用正反馈放大器来加速由用于消除输出电容器上的电荷的恒定电流源引发的电流消耗来提供掉电抑制。所公开的技术容易地应用于从CD，CD-ROM，DAT和其他数字记录介质接收的输出。

7. 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。

8. 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。

9. 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.

10. 发明授权

US07477079B2 Single ended switched capacitor circuit 有权
标题翻译：单端开关电容电路
公开(公告)号：US07477079B2
公开(公告)日：2009-01-13
申请号：US10938002
申请日：2004-09-10
申请人： Johann G. Gaboriau , Joseph J. Welser
发明人： Johann G. Gaboriau , Joseph J. Welser
IPC分类号： H03K17/00
CPC分类号： H03M1/08
摘要： A single-ended, non-differential switched capacitor circuit is disclosed which removes the effect of common mode noise. To this end, the circuit creates a capacitance divider using the sampling capacitors, Cs, to create a stable and noise-free common mode voltage (Vcom) signal. Once created, this Vcom signal is coupled across a large common mode capacitance, Ccom, which is preferably off chip, to further control its value. Thereafter, the voltage Vcom is preferably allowed to settle while the data is disconnected. In this way, the Vcom signal is not provided to the circuit, but instead is cleanly generated within the circuit itself when needed. Thereafter, the generated Vcom signal is paralleled with the integration capacitor, C1, to produce the non-differential output voltage Vout. Then, the sampling capacitors, Cs, are shorted to remove any charges stored on them and the process is repeated.
摘要翻译：公开了一种单端，非差分开关电容器电路，其消除了共模噪声的影响。为此，该电路使用采样电容器Cs创建一个电容分压器，以产生稳定和无噪声的共模电压（Vcom）信号。一旦创建，该Vcom信号跨越大的共模电容Ccom耦合，Ccom优选地是芯片外的，以进一步控制其值。此后，优选地，在断开数据的同时使电压Vcom稳定。以这种方式，Vcom信号不提供给电路，而是在需要时在电路本身内完全产生。此后，所生成的Vcom信号与积分电容器C1并联，以产生非差分输出电压Vout。然后，采样电容器Cs短路以去除其上存储的任何电荷，并重复该过程。

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