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1. 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。

2. 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。

3. 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。

4. 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。

5. 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.

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

US06531975B1 Apparatus and method for multi-channel digital to analog conversion of signals with different sample rates 有权
标题翻译：具有不同采样率的信号的多通道数模转换的装置和方法
公开(公告)号：US06531975B1
公开(公告)日：2003-03-11
申请号：US09865079
申请日：2001-05-24
申请人： Brian D. Trotter , Thomas D. Stein , Heling Yi , Jason P. Rhode , Timothy T. Rueger
发明人： Brian D. Trotter , Thomas D. Stein , Heling Yi , Jason P. Rhode , Timothy T. Rueger
IPC分类号： H03M166
CPC分类号： H03M1/662
摘要： An apparatus and method for converting digital input signals sampled at different rates to analog signals includes a digital to analog converter for each digital input signal. Each digital to analog converter receives a digital input signal and a clock signal corresponding to the sampling rate of the received digital input signal. The apparatus can also receive a set of sample rate signals indicating the sampling rate for each digital input signal. The sample rate signals are used to route each digital input signal, along with a corresponding clock signal, to a corresponding digital to analog converter (DAC). A clock error signal controls routing of the digital input signals to the DACs as well as operation of the DACs. A clock divider and ratio detector module generates the clock error signal based on intermediate clock error signals that correspond to the sample rates.
摘要翻译：用于将以不同速率采样的数字输入信号转换为模拟信号的装置和方法包括用于每个数字输入信号的数模转换器。每个数模转换器接收与所接收的数字输入信号的采样率相对应的数字输入信号和时钟信号。该装置还可以接收指示每个数字输入信号的采样率的一组采样率信号。采样率信号用于将每个数字输入信号与相应的时钟信号一起路由到相应的数模转换器（DAC）。时钟误差信号控制数字输入信号到DAC的路由以及DAC的工作。时钟分频器和比率检测器模块基于对应于采样率的中间时钟误差信号生成时钟误差信号。

8. 发明授权

US06492928B1 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：US06492928B1
公开(公告)日：2002-12-10
申请号：US09908672
申请日：2001-07-18
申请人： Jason P. Rhode , John J. Paulos , Andrew W. Krone , Richard Bocock
发明人： Jason P. Rhode , John J. Paulos , Andrew W. Krone , Richard Bocock
IPC分类号： H03M166
CPC分类号： H03M1/0881 , H03M1/66
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 clamping an output signal to ground, driving the audio channel to ground, releasing the clamp and driving the audio channel 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 audio digital-to-analog converter sets operational mode based on ratios of a master clock to a channel selection clock. 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。通过将输出信号钳位到地，将音频通道驱动到地，释放钳位并逐渐将音频通道驱动到其静态（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。音频数/模转换器基于主时钟与频道选择时钟的比率来设置操作模式。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。

9. 发明授权

US07010131B1 Quasi-differential power amplifier and method 失效
标题翻译：准差分功率放大器及方法
公开(公告)号：US07010131B1
公开(公告)日：2006-03-07
申请号：US09079864
申请日：1998-05-15
申请人： Jason P. Rhode , John J. Paulos
发明人： Jason P. Rhode , John J. Paulos
IPC分类号： H03F21/00 , H03F3/45 , H04R3/00
CPC分类号： H03F3/68 , H04R3/00
摘要： A quasi-differential power amplifier and method are disclosed that enhance drive capability and dynamic range by driving a right, left and common terminals with a right channel output signal, a left channel output signal, and a common mode output signal that are each a combination of the left and right channel input signals. In addition, the common mode output signal may be used as feedback so that the left and right channel output signals so that these signals are dependent upon feedback from the common mode output signal. The quasi-differential power amplifier may include a first amplifier driving the left channel output signal, a second amplifier driving the right channel output signal, and a third amplifier driving the common mode output signal. In one application, the quasi-differential amplifier may be used to drive three-wire stereo headphones for use in small portable stereo systems.
摘要翻译：公开了一种准差分功率放大器和方法，其通过用右通道输出信号，左通道输出信号和共模输出信号驱动右，左和公共端子来增强驱动能力和动态范围的左右声道输入信号。此外，共模输出信号可以用作反馈，使得左和右声道输出信号使得这些信号取决于来自共模输出信号的反馈。准差分功率放大器可以包括驱动左声道输出信号的第一放大器，驱动右声道输出信号的第二放大器和驱动共模输出信号的第三放大器。在一个应用中，准差分放大器可以用于驱动用于小型便携式立体声系统的三线立体声耳机。

10. 发明授权

US06281821B1 Digital-to-analog converter with power up/down transient suppression and automatic rate switching 失效
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：US06281821B1
公开(公告)日：2001-08-28
申请号：US08941566
申请日：1997-09-30
申请人： Jason P. Rhode , John J. Paulos , Andrew W. Krone , Richard Bocock
发明人： Jason P. Rhode , John J. Paulos , Andrew W. Krone , Richard Bocock
IPC分类号： H03M166
CPC分类号： H03M1/0881 , H03M1/66
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 clamping an output signal to ground, driving the audio channel to ground, releasing the clamp and driving the audio channel 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 audio digital-to-analog converter sets operational mode based on ratios of a master clock to a channel selection clock.
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。通过将输出信号钳位到地，将音频通道驱动到地，释放钳位并逐渐将音频通道驱动到其静态（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。音频数/模转换器基于主时钟与频道选择时钟的比率来设置操作模式。

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