LOW POWER SUPPLY MAINTAINING CIRCUIT
    22.
    发明申请
    LOW POWER SUPPLY MAINTAINING CIRCUIT 审中-公开
    低电源维护电路

    公开(公告)号:US20090224741A1

    公开(公告)日:2009-09-10

    申请号:US12044726

    申请日:2008-03-07

    IPC分类号: G05F1/44 G05F1/10

    CPC分类号: G05F1/56

    摘要: A circuit may include a load that is configured to enter a low power mode, a capacitor that is operably coupled to the load and that is configured to provide a minimum voltage and current for the load to maintain its state while in the low power mode, a finite state machine that is configured to receive a clock signal and to duty cycle on a periodic basis based on the clock signal and to enable a power-up signal on the periodic basis, and a low-dropout voltage regulator that is operably coupled to the finite state machine and to the capacitor and that is configured to receive the power-up signal from the finite state machine, to power on in response to receiving the power-up signal, to provide a voltage upon power on to the capacitor, and to regulate the voltage to charge the capacitor.

    摘要翻译: 电路可以包括配置为进入低功率模式的负载,可操作地耦合到负载的电容器,并且被配置为在负载低功率模式下为负载提供最小电压和电流以维持其状态, 有限状态机,其被配置为基于时钟信号周期性地接收时钟信号和占空比,并且能够周期性地启用上电信号;以及低压差稳压器,其可操作地耦合到 有限状态机和电容器,并且被配置为从有限状态机接收上电信号,响应于接收到上电信号而接通电源,以在电容器上电时提供电压,以及 调节电压对电容充电。

    Transceiver system and method of using same
    23.
    发明申请
    Transceiver system and method of using same 有权
    收发系统及其使用方法

    公开(公告)号:US20080020717A1

    公开(公告)日:2008-01-24

    申请号:US11902630

    申请日:2007-09-24

    IPC分类号: H04B1/44

    CPC分类号: H04B5/02 H04B5/0093

    摘要: A chip comprises and operational section and an input/output section. The operational section includes a controller. The input/output (I/O) section is coupled to the operational section. The I/O section comprises a transformer and a switching device. The transformer includes a primary side connected to first and second I/O ports and a secondary side connected to the operational section. The switching device is coupled to the controller and between the first and second I/O ports and a bias port, such that, under control of the controller, the switching device connects one of the first and second I/O ports to the bias port.

    摘要翻译: 芯片包括操作部分和输入/输出部分。 操作部分包括控制器。 输入/输出(I / O)部分耦合到操作部分。 I / O部分包括变压器和开关装置。 变压器包括连接到第一和第二I / O端口的初级侧和连接到操作部分的次级侧。 开关装置耦合到控制器并且在第一和第二I / O端口与偏置端口之间,使得在控制器的控制下,开关装置将第一和第二I / O端口中的一个连接到偏置端口 。

    Transformer-based multi-band RF front-end architecture

    公开(公告)号:US20060270377A1

    公开(公告)日:2006-11-30

    申请号:US11136850

    申请日:2005-05-25

    IPC分类号: H04B1/28

    CPC分类号: H04B1/006 H04B1/406

    摘要: An apparatus and method for allowing two different signal paths to be coupled to a multi-tap transformer balun. The multi-tap transformer has a first port, which is coupled to a single antenna, and two or more differential secondary ports. Each port has one or more taps, which are optimized separately for each of the signal paths, allowing each of the two or more signal paths to operate in different frequency bands. Use of the method of the invention can decrease the number of external components and integrated circuit package pins, and reduce the area required for each signal path on an integrated circuit die, a printed circuit board, or the like.

    Method and system for flexible FM tuning

    公开(公告)号:US20060270337A1

    公开(公告)日:2006-11-30

    申请号:US11287120

    申请日:2005-11-22

    IPC分类号: H04H1/00

    摘要: A method and system for flexible FM tuning are provided and may include tuning to a particular frequency within a range of FM channels based on an IF frequency that includes an integer multiple of the channel spacing between neighboring allocated FM channels within the range of FM channels, offset by at most one-half the channel spacing. The method may further include determining whether the particular frequency comprises an on frequency channel, utilizing a frequency error that is based on the IF frequency. A local oscillator frequency may be selected for the tuning based on the frequency offset. An intermediate frequency (IF) channel may be generated utilizing the particular frequency and the selected local oscillator frequency. The generated IF channel may be between neighboring channels selected from the range of FM channels. The frequency error may be determined for the particular frequency within the range of FM channels.

    Transceiver system and method of using same
    28.
    发明申请
    Transceiver system and method of using same 失效
    收发系统及其使用方法

    公开(公告)号:US20060084392A1

    公开(公告)日:2006-04-20

    申请号:US10965024

    申请日:2004-10-15

    IPC分类号: G06F3/00

    CPC分类号: H04B5/02 H04B5/0093

    摘要: A chip comprises and operational section and an input/output section. The operational section includes a controller. The input/output (I/O) section is coupled to the operational section. The I/O section comprises a transformer and a switching device. The transformer includes a primary side connected to first and second I/O ports and a secondary side connected to the operational section. The switching device is coupled to the controller and between the first and second I/O ports and a bias port, such that, under control of the controller, the switching device connects one of the first and second I/O ports to the bias port.

    摘要翻译: 芯片包括操作部分和输入/输出部分。 操作部分包括控制器。 输入/输出(I / O)部分耦合到操作部分。 I / O部分包括变压器和开关装置。 变压器包括连接到第一和第二I / O端口的初级侧和连接到操作部分的次级侧。 开关装置耦合到控制器并且在第一和第二I / O端口与偏置端口之间,使得在控制器的控制下,开关装置将第一和第二I / O端口中的一个连接到偏置端口 。

    System and method for on-chip resistor calibration in semiconductor devices
    30.
    发明授权
    System and method for on-chip resistor calibration in semiconductor devices 有权
    半导体器件片上电阻校准的系统和方法

    公开(公告)号:US08476911B2

    公开(公告)日:2013-07-02

    申请号:US12927240

    申请日:2010-11-10

    IPC分类号: G01R27/29 G01R35/00

    摘要: According to one disclosed embodiment, an on-chip resistor calibration circuit includes an RC oscillator having a test resistor and a precision capacitor as elements, a counter, and a reference clock. In one embodiment, an RC oscillator generates a waveform having a period dependent upon the resistance of the test resistor and the capacitance of the precision capacitor. In such an embodiment, a counter and a reference clock may be configured to measure the period of the waveform. Using a pre-determined capacitance of the precision capacitor, a resistance of the test resistor may be determined. In another embodiment, an RC oscillator generates first and second waveforms through use of an additional capacitor that can be switched in and out of the RC oscillator circuit. Using a pre-determined capacitance of the precision capacitor, an RC product of the test resistor and the additional capacitor may be determined.

    摘要翻译: 根据一个公开的实施例,片上电阻校准电路包括具有测试电阻器和精密电容器作为元件的RC振荡器,计数器和参考时钟。 在一个实施例中,RC振荡器产生具有取决于测试电阻器的电阻和精密电容器的电容的周期的波形。 在这种实施例中,计数器和参考时钟可被配置为测量波形的周期。 使用精密电容器的预定电容,可以确定测试电阻器的电阻。 在另一个实施例中,RC振荡器通过使用可以进入和离开RC振荡器电路的附加电容器产生第一和第二波形。 使用精密电容器的预定电容,可以确定测试电阻器的RC乘积和附加电容器。