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    CRYSTAL OSCILLATOR WITH ELECTROSTATIC DISCHARGE (ESD) COMPLIANT DRIVE LEVEL LIMITER
    2.
    发明申请
    CRYSTAL OSCILLATOR WITH ELECTROSTATIC DISCHARGE (ESD) COMPLIANT DRIVE LEVEL LIMITER 有权
    带静电放电（ESD）符合性驱动级限制的水晶振荡器

    公开(公告)号：US20140104009A1

    公开(公告)日：2014-04-17

    申请号：US13650956

    申请日：2012-10-12

    Applicant: Google Inc.

    Inventor： Cheng-Yi Andrew Lin

    IPC: H03B5/36

    CPC classification number: H03B5/362 ,  H01L27/0255 ,  H02H9/046 ,  H03B5/364 ,  H03B2200/0012

    Abstract: A crystal oscillator may be configured to limit crystal drive level in the crystal oscillator by clamping via a diode-resistor branch, voltage applied to a drain pad of the crystal oscillator. The crystal oscillator may incorporate Pierce crystal oscillator based implementation. The crystal oscillator may comprise an on-chip main branch, comprising at least one transistor element; an on-chip drain branch connecting the main branch to a drain pad; an on-chip gate branch connecting the main branch to a gate pad. The diode-resistor branch may be connected to the drain branch, and may comprise at least one diode and at least one resistor element. The at least one diode and the at least one resistor element may be connected in series in the diode-resistor branch. The clamped voltage may be applied from an off-chip drain node, through the drain pad.

    Abstract translation: 晶体振荡器可以被配置为通过钳位通过二极管电阻器分支来施加到晶体振荡器的漏极焊盘的电压来限制晶体振荡器中的晶体驱动电平。 晶体振荡器可以包含基于Pierce晶体振荡器的实现。 晶体振荡器可以包括片上主分支，包括至少一个晶体管元件; 将主分支连接到排水垫的片上排水分支; 将主分支连接到栅极焊盘的片上栅极支路。 二极管 - 电阻器分支可以连接到漏极支路，并且可以包括至少一个二极管和至少一个电阻器元件。 至少一个二极管和至少一个电阻器元件可以串联连接在二极管 - 电阻器分支中。 钳位电压可以从片外漏极节点通过漏极焊盘施加。

    Calibration of an R2R ladder based current digital-to-analog converter (DAC)
    3.
    发明授权
    Calibration of an R2R ladder based current digital-to-analog converter (DAC) 有权
    基于R2R梯形图的当前数模转换器（DAC）的校准

    公开(公告)号：US08576101B1

    公开(公告)日：2013-11-05

    申请号：US13668706

    申请日：2012-11-05

    Applicant: Google Inc.

    Inventor： Cheng-Yi Andrew Lin ,  Arnold Feldman

    IPC: H03M1/06

    CPC classification number: H03M1/1042 ,  H03M1/1047 ,  H03M1/785

    Abstract: A R2R ladder circuit implementation of a digital-to-analog convertor (DAC) may be configured to compensate for mismatch in each of a plurality of current sources in the R2R ladder circuit. The compensating of mismatch in each of the plurality of current sources may be achieved by adding one or more auxiliary current sources associated with each of the plurality of current sources, which may be used to provide pre-configured auxiliary current that would enable compensating for mismatch in current of an associated one of the plurality of current sources. For example, each of the plurality of current sources may have two auxiliary current sources, connected in parallel therewith, with one of two auxiliary current sources being switched to the positive-side and the other auxiliary current source being switched to the negative-side. The switching structure of the modified R2R ladder circuit may be implemented in any semiconductor technology (e.g., BiCMOS technology).

    Abstract translation: 数模转换器（DAC）的R2R梯形电路实现可以被配置为补偿R2R梯形电路中的多个电流源中的每一个中的失配。 可以通过添加与多个电流源中的每一个相关联的一个或多个辅助电流源来实现对多个电流源中的每一个的失配的补偿，其可用于提供预配置的辅助电流，其能够补偿不匹配 在多个电流源中的相关联的一个的电流中。 例如，多个电流源中的每一个可以具有与其并联连接的两个辅助电流源，其中两个辅助电流源中的一个切换到正侧，另一个辅助电流源切换到负极侧。 修改的R2R梯形电路的开关结构可以在任何半导体技术（例如，BiCMOS技术）中实现。

    One-pin crystal oscillator driven through a general purpose input/output device
    8.
    发明授权
    One-pin crystal oscillator driven through a general purpose input/output device 有权
    通过通用输入/输出设备驱动的单针晶体振荡器

    公开(公告)号：US09197157B1

    公开(公告)日：2015-11-24

    申请号：US14479461

    申请日：2014-09-08

    Applicant: Google Inc.

    Inventor： Cheng-Yi Andrew Lin

    IPC: H03B5/36

    CPC classification number: H03B5/36 ,  H03B5/362 ,  H03B5/366 ,  H03B2200/0008 ,  H03B2200/0012

    Abstract: Systems and techniques are disclosed for configuring a circuit containing a one-pin crystal oscillator in connection with a general-purpose input/output (GPIO) pad. The GPIO pad may be connected to on-chip circuitry such as a one-pin crystal oscillator circuit and input and output buffers. The techniques disclosed herein utilize the GPIO pad such that the GPIO pad can be used as the crystal pin for a one-pin crystal oscillator circuit, or the GPIO pad can be used as a general input or general output. If the GPIO pad is operated as a general output, an on-chip signal can be driven to off-chip components, such as instrumentation, other integrated circuits, etc. If the GPIO pad is operated as a general input, external signals can be driven to on-chip components, such as clock buffers, counters, etc.

    Abstract translation: 公开了用于配置包含与通用输入/输出（GPIO）焊盘相关的单引脚晶体振荡器的电路的系统和技术。 GPIO焊盘可以连接到片上电路，例如单引脚晶体振荡器电路和输入和输出缓冲器。 这里公开的技术利用GPIO焊盘，使得GPIO焊盘可以用作单引脚晶体振荡器电路的晶体管脚，或者GPIO焊盘可以用作通用输入或通用输出。 如果GPIO焊盘作为通用输出工作，片内信号可以被驱动到片外部件，如仪表，其他集成电路等。如果GPIO焊盘作为一般输入，外部信号可以 驱动到片上组件，如时钟缓冲器，计数器等

    OSCILLATOR STARTUP
    9.
    发明申请
    OSCILLATOR STARTUP 有权
    振荡器启动

    公开(公告)号：US20150200625A1

    公开(公告)日：2015-07-16

    申请号：US14152489

    申请日：2014-01-10

    Applicant: GOOGLE INC.

    Inventor： Clemenz Portmann ,  Cheng-Yi Andrew Lin ,  Shahriar Rabii

    IPC: H03B5/02

    CPC classification number: H03B5/06 ,  H03B5/36 ,  H03B5/362 ,  H03B5/364 ,  H03B27/00 ,  H03B2200/0074 ,  H03L7/23 ,  H03L7/24

    Abstract: A modulated signal based on a low-precision, fast startup oscillator is provided to a circuit with a high-precision, slow startup oscillator. The frequency of the modulated signal ranges around the characteristic or resonant frequency of the high precision oscillator without using feedback from the high precision oscillator circuit. An implementation can include one or more variable gain circuits that can be adjusted based on an amplitude threshold in relation to the output signal of the high precision oscillator circuit.

    Abstract translation: 基于低精度，快速启动振荡器的调制信号被提供给具有高精度，慢启动振荡器的电路。 调制信号的频率围绕高精度振荡器的特性或谐振频率而不使用高精度振荡器电路的反馈。 实施方案可以包括可以基于相对于高精度振荡器电路的输出信号的幅度阈值来调整的一个或多个可变增益电路。

    Crystal oscillator with electrostatic discharge (ESD) compliant drive level limiter
    10.
    发明授权
    Crystal oscillator with electrostatic discharge (ESD) compliant drive level limiter 有权
    具有静电放电（ESD）驱动电平限制器的晶体振荡器

    公开(公告)号：US08854147B2

    公开(公告)日：2014-10-07

    申请号：US13650956

    申请日：2012-10-12

    Applicant: Google Inc.

    Inventor： Cheng-Yi Andrew Lin

    IPC: H03B5/36

    CPC classification number: H03B5/362 ,  H01L27/0255 ,  H02H9/046 ,  H03B5/364 ,  H03B2200/0012

    Abstract: A crystal oscillator may be configured to limit crystal drive level in the crystal oscillator by clamping via a diode-resistor branch, voltage applied to a drain pad of the crystal oscillator. The crystal oscillator may incorporate Pierce crystal oscillator based implementation. The crystal oscillator may comprise an on-chip main branch, comprising at least one transistor element; an on-chip drain branch connecting the main branch to a drain pad; an on-chip gate branch connecting the main branch to a gate pad. The diode-resistor branch may be connected to the drain branch, and may comprise at least one diode and at least one resistor element. The at least one diode and the at least one resistor element may be connected in series in the diode-resistor branch. The clamped voltage may be applied from an off-chip drain node, through the drain pad.

    Abstract translation: 晶体振荡器可以被配置为通过钳位通过二极管电阻器分支来施加到晶体振荡器的漏极焊盘的电压来限制晶体振荡器中的晶体驱动电平。 晶体振荡器可以包含基于Pierce晶体振荡器的实现。 晶体振荡器可以包括片上主分支，包括至少一个晶体管元件; 将主分支连接到排水垫的片上排水分支; 将主分支连接到栅极焊盘的片上栅极支路。 二极管 - 电阻器分支可以连接到漏极支路，并且可以包括至少一个二极管和至少一个电阻器元件。 至少一个二极管和至少一个电阻器元件可以串联连接在二极管 - 电阻器分支中。 钳位电压可以从片外漏极节点通过漏极焊盘施加。

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