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    • 1. 发明申请
    • Multi-Standard Transceiver Architecture with Common Balun and Mixer
    • 多标准收发器架构,采用普通平衡 - 调压器
    • US20130116005A1
    • 2013-05-09
    • US13464070
    • 2012-05-04
    • Ramkishore GantiSanjeev RanganathanSrinath Sridharan
    • Ramkishore GantiSanjeev RanganathanSrinath Sridharan
    • H04W88/06
    • H04W88/06H04B1/0053H04B1/0458H04B1/0483H04B1/406
    • A multi-standard transceiver comprises a common balun, a controller, at least one first switch, and at least one second switch. The common balun comprises a primary coil and a secondary coil. The at least one first switch connects the primary coil of the balun to a first signal path associated with a first communication standard, or to a second signal path associated with a second communication standard responsive to a control signal provided by the controller. The at least one second switch connects the secondary coil of the balun to a first amplification path associated with the first communication standard, or to a second amplification path associated with the second communication standard responsive to a control signal provided by the controller. A common mixer is configured to provide upconverted signals to one of the signal paths depending on which communication standard has been selected.
    • 多标准收发器包括公共平衡 - 不平衡变压器,控制器,至少一个第一开关和至少一个第二开关。 普通的不平衡变压器包括初级线圈和次级线圈。 所述至少一个第一开关响应于由控制器提供的控制信号将平衡 - 不平衡变换器的初级线圈连接到与第一通信标准相关联的第一信号路径或者与第二通信标准相关联的第二信号路径。 响应于由控制器提供的控制信号,至少一个第二开关将平衡 - 不平衡变换器的次级线圈连接到与第一通信标准相关联的第一放大路径,或者连接到与第二通信标准相关联的第二放大路径。 公共混频器被配置为根据选择了哪个通信标准来向一个信号路径提供上变频信号。
    • 4. 发明授权
    • Multi-standard transceiver architecture with common balun and mixer
    • 具有普通平衡 - 不平衡转换器和混频器的多标准收发器架构
    • US08892159B2
    • 2014-11-18
    • US13464070
    • 2012-05-04
    • Ramkishore GantiSanjeev RanganathanSrinath Sridharan
    • Ramkishore GantiSanjeev RanganathanSrinath Sridharan
    • H04W88/06H04B1/00H04B1/04H04B1/40
    • H04W88/06H04B1/0053H04B1/0458H04B1/0483H04B1/406
    • A multi-standard transceiver comprises a common balun, a controller, at least one first switch, and at least one second switch. The common balun comprises a primary coil and a secondary coil. The at least one first switch connects the primary coil of the balun to a first signal path associated with a first communication standard, or to a second signal path associated with a second communication standard responsive to a control signal provided by the controller. The at least one second switch connects the secondary coil of the balun to a first amplification path associated with the first communication standard, or to a second amplification path associated with the second communication standard responsive to a control signal provided by the controller. A common mixer is configured to provide upconverted signals to one of the signal paths depending on which communication standard has been selected.
    • 多标准收发器包括公共平衡 - 不平衡变压器,控制器,至少一个第一开关和至少一个第二开关。 普通的不平衡变压器包括初级线圈和次级线圈。 所述至少一个第一开关响应于由控制器提供的控制信号将平衡 - 不平衡变换器的初级线圈连接到与第一通信标准相关联的第一信号路径或者与第二通信标准相关联的第二信号路径。 响应于由控制器提供的控制信号,至少一个第二开关将平衡 - 不平衡变换器的次级线圈连接到与第一通信标准相关联的第一放大路径,或者连接到与第二通信标准相关联的第二放大路径。 公共混频器被配置为根据选择了哪个通信标准来向一个信号路径提供上变频信号。
    • 5. 发明授权
    • Coupling of speakers with integrated circuit
    • 扬声器与集成电路耦合
    • US08787588B2
    • 2014-07-22
    • US12713083
    • 2010-02-25
    • Sanjeev RanganathanShyam SomayajulaSrinath SridharanArnold D'SouzaRamkishore GantiLionel Cimaz
    • Sanjeev RanganathanShyam SomayajulaSrinath SridharanArnold D'SouzaRamkishore GantiLionel Cimaz
    • H04R1/10H04R5/033
    • H04R5/033H04R5/04
    • Systems and methods for a low pin architecture to couple speakers with integrated circuits are disclosed herein. In an implementation, the low pin architecture facilitates in reducing the required pin interfaces to couple a low power speaker, a high power speaker, and earphone speakers with integrated circuits (ICs). For this, the high power speaker can be cross-coupled between the pin interfaces that are coupled to the low power speaker and the earphone speakers. These pin interfaces are driven by corresponding driver circuits. In said implementation, some of the driver circuits can be shared to drive multiple pin interfaces. These shared driver circuits include a combined cascode circuit having a first cascode circuit integrated with a second cascode circuit to reliably and selectively drive one or more of the pin interfaces.
    • 本文公开了用于将扬声器耦合到集成电路的低引脚架构的系统和方法。 在一个实现中,低引脚架构有助于减少所需的引脚接口以将低功率扬声器,大功率扬声器和具有集成电路(IC)的耳机扬声器耦合。 为此,大功率扬声器可以在耦合到低功率扬声器的引脚接口和耳机扬声器之间交叉耦合。 这些引脚接口由相应的驱动电路驱动。 在所述实现中,可以共享一些驱动器电路以驱动多个引脚接口。 这些共享驱动器电路包括组合共源共栅电路,其具有与第二共源共栅电路集成的第一共源共栅电路,以可靠且选择性地驱动一个或多个引脚接口。
    • 6. 发明申请
    • POP-UP NOISE SUPPRESSION IN AUDIO
    • 音乐中的POP-UP噪声抑制
    • US20100220875A1
    • 2010-09-02
    • US12713078
    • 2010-02-25
    • Sanjeev RanganathanShyam SomayajulaSrinath SridharanLionel Cimaz
    • Sanjeev RanganathanShyam SomayajulaSrinath SridharanLionel Cimaz
    • H02B1/00
    • H04R3/002G10K11/002H04R3/00H04R3/007
    • Systems and methods for suppressing pop-up noise in an audio signal are disclosed. The system includes a driver circuit shared by a pin interface and a complementary pin interface. A control unit is coupled to the pin interface and the complementary pin interface. To activate the pin interface, the control unit is configured to first activate the driver output at the complementary pin interface. Once the complementary pin interface achieves a preset voltage, the driver output is switched to the pin interface by the control unit. In addition, the driver circuit can be calibrated for a DC offset on the complementary pin interface by re-using calibration data calculated at the pin interface. Further, DC correction signals can be provided from a pre-biasing circuit based on the calibration data of the driver circuit.
    • 公开了用于抑制音频信号中的弹出噪声的系统和方法。 该系统包括由引脚接口和互补引脚接口共享的驱动器电路。 控制单元耦合到引脚接口和互补引脚接口。 要激活引脚接口,控制单元配置为首先在互补引脚接口处激活驱动器输出。 一旦互补引脚接口达到预设电压,驱动器输出就由控制单元切换到引脚接口。 此外,可以通过重新使用在引脚接口处计算的校准数据,在互补引脚接口上校准驱动器电路的直流偏移。 此外,可以基于驱动器电路的校准数据从预偏置电路提供直流校正信号。