LOW POWER LEVEL SHIFTER WITH OUTPUT SWING CONTROL
    11.
    发明申请
    LOW POWER LEVEL SHIFTER WITH OUTPUT SWING CONTROL 有权
    具有输出开关控制的低功率电平变压器

    公开(公告)号:US20130113541A1

    公开(公告)日:2013-05-09

    申请号:US13289926

    申请日:2011-11-04

    IPC分类号: H03L5/00

    摘要: A level shifter comprising a first driver transistor receiving an input signal. A gate-controlled transistor coupled to the first driver transistor. A second driver transistor coupled to the gate controlled transistor. An output coupled to the second driver transistor, wherein the gate-controlled transistor is for receiving a predetermined gate voltage when the output voltage exceeds a predetermined value.

    摘要翻译: 一种电平移位器,包括接收输入信号的第一驱动晶体管。 耦合到第一驱动晶体管的栅极控制晶体管。 耦合到栅极控制晶体管的第二驱动晶体管。 耦合到第二驱动器晶体管的输出,其中,当输出电压超过预定值时,栅极控制晶体管用于接收预定的栅极电压。

    Systems and methods for driving high power states using lower voltage processes
    12.
    发明授权
    Systems and methods for driving high power states using lower voltage processes 有权
    使用较低电压工艺驱动高功率状态的系统和方法

    公开(公告)号:US08410839B2

    公开(公告)日:2013-04-02

    申请号:US13041065

    申请日:2011-03-04

    IPC分类号: H03L5/00

    CPC分类号: H03K17/102

    摘要: A battery assisted level shifter comprises a pull up transistor pulling up an output when a received input signal is high, a pull down transistor pulling down the output when the received input signal is low, and a battery element to provide voltage offsets. The battery element can be implemented using one or more pull-up transistors for assisting with pulling up the output. The level shifter can be used in class-D amplifiers, DC-DC power converters and interfaces between circuits having different reference voltages.

    摘要翻译: 电池辅助电平移位器包括在接收到的输入信号为高时提升输出的上拉晶体管,当所接收的输入信号为低电平时下拉输出的下拉晶体管以及提供电压偏移的电池元件。 电池元件可以使用一个或多个上拉晶体管来实现,以帮助提升输出。 电平转换器可用于D类放大器,DC-DC电源转换器和具有不同参考电压的电路之间的接口。

    Systems and methods for driving high power stages using lower voltage processes
    13.
    发明授权
    Systems and methods for driving high power stages using lower voltage processes 有权
    使用较低电压工艺驱动高功率级的系统和方法

    公开(公告)号:US07982525B2

    公开(公告)日:2011-07-19

    申请号:US12390333

    申请日:2009-02-20

    IPC分类号: H03L5/00

    CPC分类号: H03K17/102

    摘要: In today's environment class-D amplifiers are used to provide an integrated solution for applications such as powered audio devices due to their advantages in power consumption and size over more traditional analog amplifiers. Due to power output requirements, the output stages of power drivers such as class-D amplifiers require a supply voltage in excess of the technologically allowed voltage for the switches in the output stage. A level shifter is used to ensure voltages supplied to the output switches do not exceed the technological limits. An ideal level shifter should provide the optimal voltage swing to output switches under all process, supply voltage and temperature (PVT) variations. The ideal level shifter should also provide fast transitions when the control signal changes from high to low and low to high.

    摘要翻译: 在当今的环境中,D类放大器用于为诸如有源音频设备等应用提供集成解决方案,因为它们在功耗和尺寸上比传统模拟放大器具有优势。 由于功率输出要求,诸如D类放大器的功率驱动器的输出级需要超过输出级中的开关的技术允许电压的电源电压。 电平移位器用于确保提供给输出开关的电压不超过技术限制。 理想的电平转换器应在所有过程,电源电压和温度(PVT)变化下为输出开关提供最佳的电压摆幅。 当控制信号从高电平变为低电平和低电平变为高电平时,理想电平转换器也应提供快速转换。

    METHODS TO REDUCE CURRENT SPIKES IN CAPACITIVE DC-DC CONVERTERS EMPLOYING GAIN-HOPPING
    14.
    发明申请
    METHODS TO REDUCE CURRENT SPIKES IN CAPACITIVE DC-DC CONVERTERS EMPLOYING GAIN-HOPPING 有权
    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

    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。

    Systems and methods for offset cancellation method for DC-coupled audio drivers
    15.
    发明授权
    Systems and methods for offset cancellation method for DC-coupled audio drivers 有权
    用于直流耦合音频驱动器的偏移消除方法的系统和方法

    公开(公告)号:US08344797B2

    公开(公告)日:2013-01-01

    申请号:US12623202

    申请日:2009-11-20

    IPC分类号: H03F1/02

    摘要: Direct current (DC) offset in and audio driver can cause a constant drain on power even when there is no sound. Furthermore it can cause an audible pop when the audio driver is enabled. A scaled replica output stage can be employed to perform DC offset cancellation offline during a sampling phase. Once DC offset cancellation is achieved, the audio driver uses a full scale output stage during the operation phase.

    摘要翻译: 即使没有声音,直流(DC)偏移和音频驱动器也会导致电源的恒定漏电。 此外,当音频驱动程序启用时,它可能会导致声音弹出。 可以采用缩放的副本输出级,以在采样阶段离线执行直流偏移消除。 一旦实现了DC偏移消除,则音频驱动器在操作阶段使用满量程输出级。

    ANTI-POP CIRCUIT
    16.
    发明申请
    ANTI-POP CIRCUIT 有权
    反向电话

    公开(公告)号:US20120062320A1

    公开(公告)日:2012-03-15

    申请号:US13300012

    申请日:2011-11-18

    IPC分类号: H03F3/26

    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。

    Tuning and DAC Selection of High-Pass Filters for Audio Codecs
    17.
    发明申请
    Tuning and DAC Selection of High-Pass Filters for Audio Codecs 有权
    调谐和DAC选择音频编解码器的高通滤波器

    公开(公告)号:US20110087346A1

    公开(公告)日:2011-04-14

    申请号:US12578477

    申请日:2009-10-13

    IPC分类号: G06F17/00

    CPC分类号: H03G5/005

    摘要: An integrated audio codec includes a high-pass filter to prevent damage to personal computer speakers and other components. The audio codec may be compliant with HD audio standards and can operate with generic software drivers. Tuning of the high-pass filter is provided through an external pin-out where either an external capacitor or external resistors provide an ability to tune the high-pass filter. In one implementation, a tuning voltage is digitized into a tuning code used by a digital high-pass filter. In addition, multiplexers can be used to insure only the audio path leading to the speakers is filtered.

    摘要翻译: 集成音频编解码器包括高通滤波器,以防止损坏个人计算机扬声器和其他组件。 音频编解码器可以符合HD音频标准,并且可以与通用软件驱动程序一起操作。 通过外部引脚提供高通滤波器的调谐,其中外部电容器或外部电阻器提供调谐高通滤波器的能力。 在一个实现中,调谐电压被数字化为由数字高通滤波器使用的调谐码。 此外,多路复用器可以用于确保仅通过扬声器的音频路径被过滤。

    Anti-Pop Circuit
    18.
    发明申请
    Anti-Pop Circuit 有权
    反流行电路

    公开(公告)号:US20100321112A1

    公开(公告)日:2010-12-23

    申请号:US12488438

    申请日:2009-06-19

    IPC分类号: H03F3/45 H03F3/16 H03F1/38

    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。

    Grounding switch method and apparatus
    20.
    发明授权
    Grounding switch method and apparatus 有权
    接地开关方式及装置

    公开(公告)号:US08526635B2

    公开(公告)日:2013-09-03

    申请号:US12828716

    申请日:2010-07-01

    IPC分类号: H04B15/00

    摘要: A grounding switch is described which operates properly even in the presence of negative voltages on a signal line. The grounding switch uses isolated field effect transistors that have their substrates tied to different voltages. The isolated field effect transistor has a gate voltage and substrate voltage which can be pulled down to a negative voltage when the signal line has a negative voltage allowing the switch to remain open even with a negative voltage.

    摘要翻译: 描述了即使在信号线上存在负电压的情况下也能正常工作的接地开关。 接地开关使用隔离的场效应晶体管,将其衬底连接到不同的电压。 隔离的场效应晶体管具有栅极电压和衬底电压,当信号线具有负电压时,该电压可以被下拉至负电压,从而允许开关即使具有负电压也保持开路。