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    Differential crystal oscillator circuit
    1.
    发明授权
    Differential crystal oscillator circuit 有权
    差分晶振电路

    公开(公告)号：US09300249B2

    公开(公告)日：2016-03-29

    申请号：US14338241

    申请日：2014-07-22

    Applicant: QUALCOMM Incorporated

    Inventor： Yashar Rajavi ,  Amirpouya Kavousian ,  Alireza Khalili ,  Mohammad Bagher Vahid Far ,  Abbas Komijani

    IPC: H03B5/32 ,  H03B5/36

    CPC classification number: H03B5/364 ,  H03B5/06 ,  H03B5/36 ,  H03B2200/004 ,  H03B2200/0094

    Abstract: A differential crystal oscillator circuit, including: first and second output terminals; a cross-coupled oscillation unit including first and second transistors cross-coupled to the first and second output terminals; first and second metal-oxide semiconductor field-effect transistor (MOSFET) diodes, each MOSFET diode including a resistor connected between gate and drain terminals, wherein the first MOSFET diode couples to the first transistor to provide low-impedance load at low frequencies and high-impedance load at higher frequencies to the first transistor, wherein the second MOSFET diode couples to the second transistor to provide low-impedance load at low frequencies and high-impedance load at higher frequencies to the second transistor; and a reference resonator coupled between the first and second output terminals to establish an oscillation frequency.

    Abstract translation: 一种差分晶体振荡器电路，包括：第一和第二输出端子; 交叉耦合振荡单元，包括交叉耦合到第一和第二输出端的第一和第二晶体管; 第一和第二金属氧化物半导体场效应晶体管（MOSFET）二极管，每个MOSFET二极管包括连接在栅极和漏极端子之间的电阻器，其中第一MOSFET二极管耦合到第一晶体管以在低频和高电平下提供低阻抗负载 在第一晶体管的较高频率处的阻抗负载，其中所述第二MOSFET二极管耦合到所述第二晶体管，以在低频处提供低阻抗负载，并以较高频率向所述第二晶体管提供高阻抗负载; 以及耦合在第一和第二输出端子之间以建立振荡频率的参考谐振器。

    Frequency synthesizer apparatus and methods for improving capacitor code search accuracy using LSB modulation
    3.
    发明授权
    Frequency synthesizer apparatus and methods for improving capacitor code search accuracy using LSB modulation 有权
    使用LSB调制改善电容码搜索精度的频率合成器装置和方法

    公开(公告)号：US09048850B2

    公开(公告)日：2015-06-02

    申请号：US13797356

    申请日：2013-03-12

    Applicant: QUALCOMM Incorporated

    Inventor： Abbas Komijani ,  Emmanouil Terrovitis ,  Justin A. Hwang

    IPC: H03L7/10 ,  H03L7/087 ,  H03J5/24 ,  H03L7/113 ,  H03L7/181

    CPC classification number: H03L7/103 ,  H03J5/244 ,  H03J2200/10 ,  H03L7/087 ,  H03L7/10 ,  H03L7/113 ,  H03L7/181 ,  H03L2207/06

    Abstract: A frequency synthesizer is disclosed that includes an oscillator having an output to deliver a signal of a controllable frequency. The oscillator includes a capacitor bank responsive to an N-bit control signal to exhibit a capacitance. The oscillator output frequency is based on the capacitance. Control logic generates the N-bit control signal and determines each bit of the N-bit control signal through a binary search step and a modulation of a least-significant-bit (LSB) of the N-bit control signal. The LSB modulation, combined with the binary search for each bit, results in a higher accuracy frequency estimation.

    Abstract translation: 公开了一种频率合成器，其包括具有输出以输送可控频率的信号的振荡器。 振荡器包括响应于N位控制信号以显示电容的电容器组。 振荡器输出频率基于电容。 控制逻辑产生N位控制信号，并且通过二进制搜索步骤和N位控制信号的最低有效位（LSB）的调制来确定N位控制信号的每个位。 LSB调制与每个比特的二进制搜索相结合，导致更高的频率估计精度。

    Differential Crystal Oscillator Circuit
    5.
    发明申请
    Differential Crystal Oscillator Circuit 有权
    差分晶振电路

    公开(公告)号：US20160028349A1

    公开(公告)日：2016-01-28

    申请号：US14338241

    申请日：2014-07-22

    Applicant: QUALCOMM Incorporated

    Inventor： Yashar Rajavi ,  Amirpouya Kavousian ,  Alireza Khalili ,  Mohammad Bagher Vahid Far ,  Abbas Komijani

    IPC: H03B5/36

    CPC classification number: H03B5/364 ,  H03B5/06 ,  H03B5/36 ,  H03B2200/004 ,  H03B2200/0094

    Abstract: A differential crystal oscillator circuit, including: first and second output terminals; a cross-coupled oscillation unit including first and second transistors cross-coupled to the first and second output terminals; first and second metal-oxide semiconductor field-effect transistor (MOSFET) diodes, each MOSFET diode including a resistor connected between gate and drain terminals, wherein the first MOSFET diode couples to the first transistor to provide low-impedance load at low frequencies and high-impedance load at higher frequencies to the first transistor, wherein the second MOSFET diode couples to the second transistor to provide low-impedance load at low frequencies and high-impedance load at higher frequencies to the second transistor; and a reference resonator coupled between the first and second output terminals to establish an oscillation frequency.

    Abstract translation: 一种差分晶体振荡器电路，包括：第一和第二输出端子; 交叉耦合振荡单元，包括交叉耦合到第一和第二输出端的第一和第二晶体管; 第一和第二金属氧化物半导体场效应晶体管（MOSFET）二极管，每个MOSFET二极管包括连接在栅极和漏极端子之间的电阻器，其中第一MOSFET二极管耦合到第一晶体管以在低频和高电平下提供低阻抗负载 在第一晶体管的较高频率处的阻抗负载，其中所述第二MOSFET二极管耦合到所述第二晶体管，以在低频处提供低阻抗负载，并以较高频率向所述第二晶体管提供高阻抗负载; 以及耦合在第一和第二输出端子之间以建立振荡频率的参考谐振器。

    Method to pre-charge crystal oscillators for fast start-up
    6.
    发明授权
    Method to pre-charge crystal oscillators for fast start-up 有权
    晶体振荡器预充电快速启动的方法

    公开(公告)号：US09246435B1

    公开(公告)日：2016-01-26

    申请号：US14617716

    申请日：2015-02-09

    Applicant: QUALCOMM Incorporated

    Inventor： Amirpouya Kavousian ,  Yashar Rajavi ,  Alireza Khalili ,  Mohammad Bagher Vahid Far ,  Abbas Komijani

    IPC: H03B5/06 ,  H03B5/36 ,  H03K3/03

    CPC classification number: H03B5/06 ,  H03B5/362 ,  H03B5/364 ,  H03B5/366 ,  H03B2200/0094 ,  H03K3/014 ,  H03K3/0307 ,  H03K3/0315 ,  H03L3/00 ,  H03L7/00

    Abstract: A method and apparatus for charging a crystal oscillator are provided. A voltage generating module outputs a ramp voltage signal to a ring oscillator. The ring oscillator generates and outputs a waveform based on the ramp voltage signal. The ramp voltage signal facilitates the ring oscillator to output the waveform at a frequency that varies with time, wherein the varying frequency is within a frequency range of the crystal oscillator. An inverter generates a digital input signal based on the waveform. The digital input signal is sent to an input of the crystal oscillator for charging the crystal oscillator. A feedback module outputs a feedback signal based on the digital input signal, wherein the feedback signal controls the voltage generating module to generate a fixed voltage signal that facilitates the ring oscillator to output the waveform at a frequency that is equal to a resonance frequency of the crystal oscillator.

    Abstract translation: 提供了一种用于对晶体振荡器充电的方法和装置。 电压产生模块向环形振荡器输出斜坡电压信号。 环形振荡器产生并输出基于斜坡电压信号的波形。 斜坡电压信号有助于环形振荡器以随时间变化的频率输出波形，其中变化的频率在晶体振荡器的频率范围内。 逆变器根据波形产生数字输入信号。 数字输入信号被发送到晶体振荡器的输入端，用于对晶体振荡器充电。 反馈模块基于数字输入信号输出反馈信号，其中反馈信号控制电压产生模块以产生固定电压信号，其有助于环形振荡器以等于的频率的频率输出波形 晶体振荡器。

    ARCHITECTURE TO REJECT NEAR END BLOCKERS AND TRANSMIT LEAKAGE
    7.
    发明申请
    ARCHITECTURE TO REJECT NEAR END BLOCKERS AND TRANSMIT LEAKAGE 有权
    拒绝接近阻塞者的结构和传输泄漏

    公开(公告)号：US20160020752A1

    公开(公告)日：2016-01-21

    申请号：US14331685

    申请日：2014-07-15

    Applicant: QUALCOMM Incorporated

    Inventor： Mohammad Bagher Vahid Far ,  Cheng-Han Wang ,  Jesse Aaron Richmond ,  Thinh Cat Nguyen ,  Abbas Komijani ,  Yashar Rajavi ,  Alireza Khalili

    IPC: H03H17/02

    CPC classification number: H03H11/0433 ,  H03H11/1252 ,  H04B1/109 ,  H04B1/525

    Abstract: A method and apparatus for minimizing transmit signal interference is provided. The method includes the steps of: receiving a signal and amplifying the received signal. The received signal is then mixed with an intermediate frequency signal to obtain a baseband modulated signal. The baseband modulated signal is first filtered in an RC filter. The resulting signal is then divided by a preselected amount and the first divided portion is sent to a main path of a biquad filter, which produces a first stage biquad filtered signal. The second portion of the divided signal is sent to an auxiliary path of the biquad filter, and produces a second filtered signal. The first and second signals are then recombined and sent to the second stage of the biquad filter, where further filtering takes place.

    Abstract translation: 提供一种用于最小化发射信号干扰的方法和装置。 该方法包括以下步骤：接收信号并放大所接收的信号。 然后将接收到的信号与中频信号混合以获得基带调制信号。 首先在RC滤波器中过滤基带调制信号。 然后将所得信号除以预选量，并将第一分割部分发送到双二阶滤波器的主路径，其产生第一级双二进制滤波信号。 分频信号的第二部分被发送到二叉滤波器的辅助路径，并且产生第二滤波信号。 然后将第一和第二信号重新组合并发送到二级滤波器的第二级，其中进行进一步的滤波。

    Two-delay voltage-controlled-oscillator with wide tuning range
    8.
    发明授权
    Two-delay voltage-controlled-oscillator with wide tuning range 有权
    具有宽调谐范围的双延迟压控振荡器

    公开(公告)号：US08884707B2

    公开(公告)日：2014-11-11

    申请号：US13651340

    申请日：2012-10-12

    Applicant: QUALCOMM Incorporated

    Inventor： Emmanouil Terrovitis ,  Abbas Komijani

    IPC: H03K3/03

    CPC classification number: H03K3/03 ,  H03K2005/00071

    Abstract: An oscillator is disclosed that can generate an oscillation signal using a latch and two delay elements. For some embodiments, the oscillator includes an SR latch, a first delay element, and a second delay element. The SR latch has a first input, a second input, a first output, and a second output. The first delay element is coupled between the first output and the first input of the SR latch. The second delay element is coupled between the second output and the second input of the SR latch. For some embodiments, the first and second delay elements include a programmable pull-up circuit that allows the charging current to be adjusted in discrete amounts, and include a programmable capacitor circuit that allows the capacitance value to be adjusted in discrete amounts.

    Abstract translation: 公开了一种使用锁存器和两个延迟元件产生振荡信号的振荡器。 对于一些实施例，振荡器包括SR锁存器，第一延迟元件和第二延迟元件。 SR锁存器具有第一输入，第二输入，第一输出和第二输出。 第一延迟元件耦合在第一输出和SR锁存器的第一输入端之间。 第二延迟元件耦合在SR锁存器的第二输出端和第二输入端之间。 对于一些实施例，第一和第二延迟元件包括允许以离散量调节充电电流的可编程上拉电路，并且包括允许以离散量调整电容值的可编程电容器电路。

    FREQUENCY SYNTHESIZER APPARATUS AND METHODS FOR IMPROVING CAPACITOR CODE SEARCH ACCURACY USING LSB MODULATION
    9.
    发明申请
    FREQUENCY SYNTHESIZER APPARATUS AND METHODS FOR IMPROVING CAPACITOR CODE SEARCH ACCURACY USING LSB MODULATION 有权
    频率合成器装置和使用LSB调制改进电容器代码搜索精度的方法

    公开(公告)号：US20140002205A1

    公开(公告)日：2014-01-02

    申请号：US13797356

    申请日：2013-03-12

    Applicant: QUALCOMM INCORPORATED

    Inventor： Abbas Komijani ,  Emmanouil Terrovitis ,  Justin A. Hwang

    IPC: H03L7/00

    CPC classification number: H03L7/103 ,  H03J5/244 ,  H03J2200/10 ,  H03L7/087 ,  H03L7/10 ,  H03L7/113 ,  H03L7/181 ,  H03L2207/06

    Abstract: A frequency synthesizer is disclosed that includes an oscillator having an output to deliver a signal of a controllable frequency. The oscillator includes a capacitor bank responsive to an N-bit control signal to exhibit a capacitance. The oscillator output frequency is based on the capacitance. Control logic generates the N-bit control signal and determines each bit of the N-bit control signal through a binary search step and a modulation of a least-significant-bit (LSB) of the N-bit control signal. The LSB modulation, combined with the binary search for each bit, results in a higher accuracy frequency estimation.

    Abstract translation: 公开了一种频率合成器，其包括具有输出以输送可控频率的信号的振荡器。 振荡器包括响应于N位控制信号以显示电容的电容器组。 振荡器输出频率基于电容。 控制逻辑产生N位控制信号，并且通过二进制搜索步骤和N位控制信号的最低有效位（LSB）的调制来确定N位控制信号的每个位。 LSB调制与每个比特的二进制搜索相结合，导致更高的频率估计精度。

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