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21. 发明授权

US08325940B2 Power management controller for drivers 有权
标题翻译：驱动程序电源管理控制器
公开(公告)号：US08325940B2
公开(公告)日：2012-12-04
申请号：US12339635
申请日：2008-12-19
申请人： Christian Larsen , Lorenzo Crespi , Mouna Elkhatib , Mary X. Lu , James Bunde Viliadsen Skov
发明人： Christian Larsen , Lorenzo Crespi , Mouna Elkhatib , Mary X. Lu , James Bunde Viliadsen Skov
IPC分类号： H04B15/00
CPC分类号： H04R3/00 , H03F1/305 , H03F3/187 , H03F2200/03 , H03F2200/249 , H03F2200/414 , H03G3/348
摘要： A driver controller comprising a state machine for controlling transitions between a plurality of states. An output switch for providing a low impedance path to ground during transition periods. An output stage for decoupling output signal from driver amplifier during the transition periods.
摘要翻译：一种驱动器控制器，包括用于控制多个状态之间的转换的状态机。输出开关，用于在过渡期间提供低阻抗地线路径。用于在过渡期间将输出信号与驱动放大器去耦的输出级。

22. 发明授权

US08446216B2 Anti-pop circuit 有权
标题翻译：防爆电路
公开(公告)号：US08446216B2
公开(公告)日：2013-05-21
申请号：US13300012
申请日：2011-11-18
申请人： Xin Fan , Christian Larsen , Lorenzo Crespi
发明人： Xin Fan , Christian Larsen , Lorenzo Crespi
IPC分类号： H03F1/14
CPC分类号： H03F1/305 , H03F3/3022 , H03F3/45183 , H03F2200/144 , H03F2203/45526 , H03F2203/45534 , H03F2203/45674
摘要： Presently many audio chips suffer from pop issues, which is especially serious for single ended audio drivers. An audio pop is a disturbance in the output caused by a sudden transition of chip power, particularly when a chip is powered on or powered off. Furthermore, compensation networks included in the amplifiers on audio chips for stability offer a significant path for transmitting power disturbances to the output. Hence, circuitry is developed to suppress pops in the output stages of an amplifier.
摘要翻译：目前许多音频芯片遭受流行问题，对于单端音频驱动程序来说尤其严重。音频弹奏是由芯片功率的突然转换引起的输出干扰，特别是当芯片通电或断电时。此外，用于稳定性的用于音频芯片的放大器中的补偿网络提供了将功率干扰发送到输出的重要路径。因此，开发电路以抑制放大器的输出级中的弹出。

23. 发明申请

US20130257176A1 METHODS TO REDUCE CURRENT SPIKES IN CAPACITIVE DC-DC CONVERTERS EMPLOYING GAIN-HOPPING 有权
标题翻译：减少采用增益控制的电容式DC-DC转换器中电流脉冲的方法
公开(公告)号：US20130257176A1
公开(公告)日：2013-10-03
申请号：US13856393
申请日：2013-04-03
申请人： Lorenzo Crespi , Lakshmi Murukutla
发明人： Lorenzo Crespi , Lakshmi Murukutla
IPC分类号： H02M3/06
CPC分类号： H02M3/06 , H02M3/07
摘要： A capacitive voltage converter providing multiple gain modes comprising a switched capacitor array having a voltage input and a voltage output. A skip gating control coupled to the switched capacitor array and configured to control a switch resistance value of the switched capacitor array, and to control a switching sequence of the switched capacitor array. An override control coupled to the skip gating control and the switched capacitor array, the override control configured to detect transitions in a gain mode and to modify the switch resistance value of the switched capacitor array and the switching sequence of the switched capacitor array for a finite amount of time following the gain mode transition.
摘要翻译：提供多个增益模式的电容性电压转换器，包括具有电压输入和电压输出的开关电容器阵列。一个跳闸门控控制，其耦合到开关电容器阵列并且被配置为控制开关电容器阵列的开关电阻值，并且控制开关电容器阵列的开关顺序。耦合到跳跃门控控制和开关电容器阵列的覆盖控制，覆盖控制被配置为检测增益模式中的转变并且修改开关电容器阵列的开关电阻值和用于有限的开关电容器阵列的开关顺序增益模式转换后的时间量。

24. 发明授权

US07952508B2 Noise-shaped scrambler for reduced out-of-band common-mode interference 有权
标题翻译：用于降低带外共模干扰的噪声扰码器
公开(公告)号：US07952508B2
公开(公告)日：2011-05-31
申请号：US12553004
申请日：2009-09-02
申请人： Lorenzo Crespi , Ketan B Patel , Kyehyung Lee
发明人： Lorenzo Crespi , Ketan B Patel , Kyehyung Lee
IPC分类号： H03M1/66
CPC分类号： H03M1/066 , H03F3/217 , H03M1/822 , H03M3/502 , H03M7/3028 , H03M7/3037
摘要： Class-D amplifiers have evolved from using binary pulse-width modulation (PWM) modulators to three-level PWM modulators. Three-level PWM drivers for audio applications offer the benefits of eliminating costly elements at the output of an audio system. However, they also introduce increased common-mode interference. Three-level PWM generates three states, but one state has two interchangeable representations which can be scrambled in order to shape the common-mode output spectrum.
摘要翻译： D类放大器已经从使用二进制脉宽调制（PWM）调制器演进到三电平PWM调制器。用于音频应用的三级PWM驱动器提供消除音频系统输出的昂贵元素的优点。然而，它们也引入增加的共模干扰。三电平PWM产生三个状态，但是一个状态具有两个可互换的表示，其可被加扰以形成共模输出频谱。

25. 发明申请

US20130141829A1 CURRENT DETECTION AND LIMITING METHOD AND APPARATUS 审中-公开
标题翻译：电流检测和限制方法和装置
公开(公告)号：US20130141829A1
公开(公告)日：2013-06-06
申请号：US13625641
申请日：2012-09-24
申请人： James Bunde Villadsen Skov , Lorenzo Crespi , Ketan B. Patel
发明人： James Bunde Villadsen Skov , Lorenzo Crespi , Ketan B. Patel
IPC分类号： H02H9/02
CPC分类号： H02H9/02 , G06F1/266 , G06F2213/0042
摘要： An apparatus for detecting and controlling current. A current detector for generating a first value that represents an amount of current being delivered to a device. A current limit circuit for generating a second value that represents a maximum permitted current level from a current source. A current controller for controlling the amount of current drawn by the device if the first value exceeds the second value.
摘要翻译：一种用于检测和控制电流的装置。一种电流检测器，用于产生表示传送到设备的电流量的第一值。一个用于产生表示来自当前源的最大允许电流电平的第二值的电流限制电路。一种电流控制器，用于如果所述第一值超过所述第二值，则控制由所述装置吸取的电流量。

26. 发明授权

US08274772B2 Current detection and limiting method and apparatus 有权
标题翻译：电流检测与限制方法及装置
公开(公告)号：US08274772B2
公开(公告)日：2012-09-25
申请号：US12341753
申请日：2008-12-22
申请人： James Bunde Villadsen Skov , Lorenzo Crespi , Ketan B. Patel
发明人： James Bunde Villadsen Skov , Lorenzo Crespi , Ketan B. Patel
IPC分类号： H02H9/02 , H02H3/08
CPC分类号： H02H9/02 , G06F1/266 , G06F2213/0042
摘要： An apparatus for detecting and controlling current. A current detector for generating a first value that represents an amount of current being delivered to a device. A current limit circuit for generating a second value that represents a maximum permitted current level from a current source. A current controller for controlling the amount of current drawn by the device if the first value exceeds the second value.
摘要翻译：一种用于检测和控制电流的装置。一种电流检测器，用于产生表示传送到设备的电流量的第一值。一个用于产生表示来自当前源的最大允许电流电平的第二值的电流限制电路。一种电流控制器，用于如果所述第一值超过所述第二值，则控制由所述装置吸取的电流量。

27. 发明申请

US20100157498A1 Current Detection and Limiting Method and Apparatus 有权
标题翻译：电流检测与限制方法及装置
公开(公告)号：US20100157498A1
公开(公告)日：2010-06-24
申请号：US12341753
申请日：2008-12-22
申请人： James Skov , Lorenzo Crespi , Ketan B. Patel
发明人： James Skov , Lorenzo Crespi , Ketan B. Patel
IPC分类号： H02H9/08
CPC分类号： H02H9/02 , G06F1/266 , G06F2213/0042
摘要： An apparatus for detecting and controlling current. A current detector for generating a first value that represents an amount of current being delivered to a device. A current limit circuit for generating a second value that represents a maximum permitted current level from a current source. A current controller for controlling the amount of current drawn by the device if the first value exceeds the second value.
摘要翻译：一种用于检测和控制电流的装置。一种电流检测器，用于产生表示传送到设备的电流量的第一值。一个用于产生表示来自当前源的最大允许电流电平的第二值的电流限制电路。一种电流控制器，用于如果所述第一值超过所述第二值，则控制由所述装置吸取的电流量。

28. 发明授权

US08797770B2 System and method for capacitive DC-DC converter with variable input and output voltages 有权
标题翻译：具有可变输入和输出电压的电容式DC-DC转换器的系统和方法
公开(公告)号：US08797770B2
公开(公告)日：2014-08-05
申请号：US13312879
申请日：2011-12-06
申请人： Matteo Conta , Lorenzo Crespi
发明人： Matteo Conta , Lorenzo Crespi
IPC分类号： H02M3/18
CPC分类号： H02M3/07 , H02M2001/0035 , H02M2001/0045 , Y02B70/16
摘要： A capacitive voltage converter comprising a switched capacitor array having a voltage input and a voltage output. A skip gating control coupled to the switched capacitor array and configured to control a switching activity of the switched capacitor array. A resistance look-up table coupled to the switched capacitor array and configured to control a resistance value of the switched capacitor array.
摘要翻译：一种电容式电压转换器，包括具有电压输入和电压输出的开关电容器阵列。耦合到开关电容器阵列并被配置为控制开关电容器阵列的开关活动的跳闸选通控制。耦合到开关电容器阵列并被配置为控制开关电容器阵列的电阻值的电阻查找表。

29. 发明授权

US08044690B2 System and method for clock-synchronized triangular waveform generation 有权
标题翻译：用于时钟同步三角波形生成的系统和方法
公开(公告)号：US08044690B2
公开(公告)日：2011-10-25
申请号：US12574663
申请日：2009-10-06
申请人： Ketan B Patel , Lorenzo Crespi , Lakshmi P Murukutla
发明人： Ketan B Patel , Lorenzo Crespi , Lakshmi P Murukutla
IPC分类号： H03K4/06
CPC分类号： H03F3/217 , H03K4/06 , H03K4/50
摘要： A triangular waveform generator is converted to a free running oscillator controlled by a calibration code. The free running oscillator can be synchronized to an external clock signal by comparing the external clock frequency to the frequency of the triangular waveform and adjusting the calibration code until the discrepancy in frequency is minimized.
摘要翻译：三角形波形发生器转换为由校准码控制的自由振荡振荡器。通过将外部时钟频率与三角波形的频率进行比较并调整校准代码，可以将自由振荡器与外部时钟信号同步，直到频率偏差最小化为止。

30. 发明申请

US20110080191A1 System and Method for Clock-Synchronized Triangular Waveform Generation 有权
标题翻译：用于时钟同步三角波形生成的系统和方法
公开(公告)号：US20110080191A1
公开(公告)日：2011-04-07
申请号：US12574663
申请日：2009-10-06
申请人： Ketan B. Patel , Lorenzo Crespi , Lakshmi P. Murukutla
发明人： Ketan B. Patel , Lorenzo Crespi , Lakshmi P. Murukutla
IPC分类号： H02M7/5395
CPC分类号： H03F3/217 , H03K4/06 , H03K4/50
摘要： A triangular waveform generator is converted to a free running oscillator controlled by a calibration code. The free running oscillator can be synchronized to an external clock signal by comparing the external clock frequency to the frequency of the triangular waveform and adjusting the calibration code until the discrepancy in frequency is minimized.
摘要翻译：三角形波形发生器转换为由校准码控制的自由振荡振荡器。通过将外部时钟频率与三角波形的频率进行比较并调整校准代码，可以将自由振荡器与外部时钟信号同步，直到频率偏差最小化为止。

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