公开(公告)号：US07598813B2

公开(公告)日：2009-10-06

申请号：US11944723

申请日：2007-11-26

Applicant: Yuyu Chang

Inventor： Yuyu Chang

IPC: H03F3/04

CPC classification number: H03F1/223 ,  H03F1/301 ,  H03F3/193 ,  H03F3/245 ,  H03F2200/108 ,  H03F2200/18 ,  H03F2200/27 ,  H03F2200/294 ,  H03F2200/447 ,  H03F2200/451 ,  H03F2200/456 ,  H03G1/0088

Abstract: Radio frequency amplifier with constant gain setting. A circuitry that includes triple well connected MOSFETs is employed to eliminate body effects therein. The voltage gain as presented herein, being implemented using a ratio of certain elements within the circuitry, is immune to variations in temperature, power supply voltage, and process variations. One implementation employs an array of selectable MOSFETs to allow for more than one gain setting to be provided by the amplifier. Such an amplifier has a variable/selectable gain setting. An appropriately placed MOSFET is employed to provide the desired input impedance (e.g., 50Ω). This design can be implemented using multiple n-channel metal oxide semiconductor field-effect transistors (N-MOSFETs) (some of which are triple well connected) and p-channel metal oxide semiconductor field-effect transistors (P-MOSFETs), or alternatively using P-MOSFETs and N-MOSFETs.

Abstract translation: 射频放大器，恒定增益设定。 使用包括三阱连接的MOSFET的电路来消除其中的体效应。 使用电路内的某些元件的比率实现的本文所呈现的电压增益不受温度变化，电源电压和工艺变化的影响。 一个实现采用可选择的MOSFET阵列，以允许由放大器提供多于一个的增益设置。 这种放大器具有可变/可选择的增益设置。 使用适当放置的MOSFET来提供期望的输入阻抗（例如，50mega）。 该设计可以使用多个n沟道金属氧化物半导体场效应晶体管（N-MOSFET）（其中一些是三阱连接的）和p沟道金属氧化物半导体场效应晶体管（P-MOSFET）来实现，或者可选地 使用P-MOSFET和N-MOSFET。

公开(公告)号：US08354890B2

公开(公告)日：2013-01-15

申请号：US12914235

申请日：2010-10-28

Applicant: Yuyu Chang ,  John Leete ,  Walid Ahmed ,  Wei Luo

Inventor： Yuyu Chang ,  John Leete ,  Walid Ahmed ,  Wei Luo

IPC: H03B1/00 ,  H03B5/32

CPC classification number: H03B5/02 ,  H03B5/04 ,  H03B5/32 ,  H03B5/368 ,  H03B2200/0034 ,  H03L1/00

Abstract: Methods and systems are provided to calibrate an oscillator circuit to reduce frequency pulling as a result of a change in power to a portion of the oscillator circuit. In an embodiment, an oscillator is coupled to a clock buffer circuit and a tuning capacitor configured to tune a frequency of the oscillator to a baseline frequency required for cellular communications. A change in power to the clock buffer circuit initiates a change in an amount of capacitance seen by the oscillator, which negatively impacts the tuning of the oscillator. A register stores a frequency offset caused by the change in power, and the tuning capacitor is adjusted, using the frequency offset, in response to the change in power, such that the total amount of capacitance seen by the oscillator is not changed when the change in power occurs.

Abstract translation: 提供了方法和系统来校准振荡器电路，以减少振荡器电路的一部分功率变化导致的频率拉动。 在一个实施例中，振荡器耦合到时钟缓冲器电路和调谐电容器，其被配置为将振荡器的频率调谐到蜂窝通信所需的基准频率。 时钟缓冲电路的功率变化启动振荡器看到的电容量的变化，这对振荡器的调谐产生负面影响。 寄存器存储由功率变化引起的频率偏移，并且使用频率偏移来调整调谐电容器以响应功率的变化，使得当变化时振荡器所看到的电容量总和没有改变 发生电力。

公开(公告)号：US07224225B2

公开(公告)日：2007-05-29

申请号：US11115698

申请日：2005-04-26

Applicant: Yuyu Chang

Inventor： Yuyu Chang

IPC: H03F3/45

CPC classification number: H03F3/193 ,  H03F3/45188 ,  H03F2200/294 ,  H03F2203/45386 ,  H03F2203/45621 ,  H03F2203/45731

Abstract: An embodiment of the present invention is a low noise amplifier using differential inductors. An input matching circuit having first and second differential inductors matches an input resistance at an input having input terminals. A differential amplifier circuit converts the input voltage a current. An output circuit provides an output voltage buffer with a low output impedance at an output having output terminals. A cascode circuit increases isolation between the input and the output terminals.

Abstract translation: 本发明的一个实施例是使用差分电感器的低噪声放大器。 具有第一和第二差分电感器的输入匹配电路匹配具有输入端的输入端的输入电阻。 差分放大器电路将输入电压转换为电流。 输出电路在具有输出端的输出端提供具有低输出阻抗的输出电压缓冲器。 共源共栅电路增加了输入端和输出端之间的隔离度。

公开(公告)号：US20060238248A1

公开(公告)日：2006-10-26

申请号：US11115698

申请日：2005-04-26

Applicant: Yuyu Chang

Inventor： Yuyu Chang

IPC: H03F3/45

CPC classification number: H03F3/193 ,  H03F3/45188 ,  H03F2200/294 ,  H03F2203/45386 ,  H03F2203/45621 ,  H03F2203/45731

Abstract: An embodiment of the present invention is a low noise amplifier using differential inductors. An input matching circuit having first and second differential inductors matches an input resistance at an input having input terminals. A differential amplifier circuit converts the input voltage a current. An output circuit provides an output voltage buffer with a low output impedance at an output having output terminals. A cascode circuit increases isolation between the input and the output terminals.

Abstract translation: 本发明的一个实施例是使用差分电感器的低噪声放大器。 具有第一和第二差分电感器的输入匹配电路匹配具有输入端的输入端的输入电阻。 差分放大器电路将输入电压转换为电流。 输出电路在具有输出端的输出端提供具有低输出阻抗的输出电压缓冲器。 共源共栅电路增加了输入端和输出端之间的隔离度。

公开(公告)号：US20110002257A1

公开(公告)日：2011-01-06

申请号：US12882684

申请日：2010-09-15

Applicant: Arya Behzad ,  Adedayo Ojo ,  Yuyu Chang ,  Hung-Ming Chien ,  Kishore Rama Rao ,  Guruprasad Seetharam

Inventor： Arya Behzad ,  Adedayo Ojo ,  Yuyu Chang ,  Hung-Ming Chien ,  Kishore Rama Rao ,  Guruprasad Seetharam

IPC: H04J3/08 ,  H04B7/14

CPC classification number: H04B1/06 ,  H04B1/0057 ,  H04B1/0082 ,  H04B7/084

Abstract: Aspects of a method and system for processing signals in a high performance receive chain may include amplifying a plurality of radio frequency signals in one or more respective one or ones of a plurality of amplifier chains in a multistandard radio frequency front-end, which may comprise one or more shared processing stages. The plurality of radio frequency signals may be compliant with a plurality of radio frequency communication standards and may be received concurrently. The one or more shared processing stages may be shared between two or more of the plurality of amplifier chains. Each of the two or more of the plurality of amplifier chains may be operable to amplify signals compliant with different radio frequency communication standards.

Abstract translation: 用于处理高性能接收链中的信号的方法和系统的方面可以包括在多标准射频前端中的多个放大器链中的一个或多个相应的一个或多个放大器链中放大多个射频信号，其可以包括 一个或多个共享处理阶段。 多个射频信号可以符合多个射频通信标准，并且可以同时接收。 一个或多个共享处理级可以在多个放大器链中的两个或更多个之间共享。 多个放大器链中的两个或更多个放大器链中的每一个可以可操作以放大符合不同射频通信标准的信号。

公开(公告)号：US20080139158A1

公开(公告)日：2008-06-12

申请号：US11618835

申请日：2006-12-31

Applicant: Yuyu Chang ,  Arya Behzad

Inventor： Yuyu Chang ,  Arya Behzad

IPC: H04B1/16

CPC classification number: H04B1/18 ,  H03F3/19 ,  H03F3/45188 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2200/534 ,  H03F2203/45318 ,  H03F2203/45386 ,  H03F2203/45544 ,  H03F2203/45638

Abstract: Aspects of a method and system for a transformer-based high performance cross-coupled low noise amplifier may include one or more circuits that integrate within a single chip, a balun with a low-noise amplifier. A DC current biasing path for the low-noise amplifier may be provided through the integrated balun. The low-noise amplifier may be configured as a cross-coupled low-noise amplifier, where the balun may be directly coupled to the cross-coupled low-noise amplifier. The balun may comprise two or more inductors, wherein one or more of the inductors may provide an electrical path for allowing a DC bias current to flow to ground. Integrating a balun on a single chip with a low-noise amplifier may allow the use of a single received signal input terminal. The biasing voltage may be selected to optimize performance of the low-noise amplifier.

Abstract translation: 用于基于变压器的高性能交叉耦合低噪声放大器的方法和系统的方面可以包括集成在单个芯片内的一个或多个电路，具有低噪声放大器的平衡 - 不平衡变压器。 可以通过集成的平衡 - 不平衡变压器提供用于低噪声放大器的直流电流偏置路径。 低噪声放大器可以被配置为交叉耦合低噪声放大器，其中平衡 - 不平衡变换器可以直接耦合到交叉耦合的低噪声放大器。 平衡 - 不平衡转换器可以包括两个或更多个电感器，其中一个或多个电感器可以提供用于允许DC偏置电流流向地的电路径。 将单芯片上的平衡 - 不平衡变换器与低噪声放大器集成可能允许使用单个接收信号输入端子。 可以选择偏置电压以优化低噪声放大器的性能。

公开(公告)号：US20080139119A1

公开(公告)日：2008-06-12

申请号：US11733047

申请日：2007-04-09

Applicant: Arya Behzad ,  Adedayo Ojo ,  Yuyu Chang ,  Hung-Ming Chien ,  Kishore Rama Rao ,  Guruprasad Seetharam

Inventor： Arya Behzad ,  Adedayo Ojo ,  Yuyu Chang ,  Hung-Ming Chien ,  Kishore Rama Rao ,  Guruprasad Seetharam

IPC: H04B7/00 ,  H04B1/26

CPC classification number: H04B1/06 ,  H04B1/0057 ,  H04B1/0082 ,  H04B7/084

Abstract: Aspects of a method and system for processing signals in a high performance receive chain may include amplifying radio frequency signals in amplifier chains in a multistandard radio frequency front-end, comprising one or more shared processing stages, and combining, with substantially equal gain, a number of phase-shifted radio frequency signals of the radio frequency signals into substantially equal-gain-combined radio frequency signals. The substantially equal-gain-combined radio frequency signals may be demodulated to obtain inphase channels and quadrature channels. A number of inphase channels and quadrature channels may be processed in I-channel processing blocks and Q-channel processing blocks to generate an output analog baseband signal. The multistandard radio frequency front-end may be capable of processing Bluetooth® signals and Wireless Local Area Network (WLAN) signals. The amplifier chains may comprise a first amplifier and a second amplifier, where the first amplifier may be shared between Bluetooth® signal processing paths and WLAN signal processing paths.

Abstract translation: 用于处理高性能接收链中的信号的方法和系统的方面可以包括在多标准射频前端放大放大器链中的射频信号，包括一个或多个共享处理级，并且以基本相等的增益组合 射频信号的相移射频信号的数量变成基本相等增益组合的射频信号。 基本上等增益组合的射频信号可以被解调以获得同相信道和正交信道。 可以在I信道处理块和Q信道处理块中处理多个同相信道和正交信道，以产生输出模拟基带信号。 多标准射频前端可能能够处理蓝牙信号和无线局域网（WLAN）信号。 放大器链可以包括第一放大器和第二放大器，其中第一放大器可以在蓝牙信号处理路径和WLAN信号处理路径之间共享。

公开(公告)号：US20120068780A1

公开(公告)日：2012-03-22

申请号：US12914235

申请日：2010-10-28

Applicant: Yuyu Chang ,  John Leete ,  Walid Ahmed ,  Wei Luo

Inventor： Yuyu Chang ,  John Leete ,  Walid Ahmed ,  Wei Luo

IPC: H03B5/02

CPC classification number: H03B5/02 ,  H03B5/04 ,  H03B5/32 ,  H03B5/368 ,  H03B2200/0034 ,  H03L1/00

Abstract: Methods and systems are provided to calibrate an oscillator circuit to reduce frequency pulling as a result of a change in power to a portion of the oscillator circuit. In an embodiment, an oscillator is coupled to a clock buffer circuit and a tuning capacitor configured to tune a frequency of the oscillator to a baseline frequency required for cellular communications. A change in power to the clock buffer circuit initiates a change in an amount of capacitance seen by the oscillator, which negatively impacts the tuning of the oscillator. A register stores a frequency offset caused by the change in power, and the tuning capacitor is adjusted, using the frequency offset, in response to the change in power, such that the total amount of capacitance seen by the oscillator is not changed when the change in power occurs.

Abstract translation: 提供了方法和系统来校准振荡器电路，以减少振荡器电路的一部分功率变化导致的频率拉动。 在一个实施例中，振荡器耦合到时钟缓冲器电路和调谐电容器，其被配置为将振荡器的频率调谐到蜂窝通信所需的基准频率。 时钟缓冲电路的功率变化启动振荡器看到的电容量的变化，这对振荡器的调谐产生负面影响。 寄存器存储由功率变化引起的频率偏移，并且使用频率偏移来调整调谐电容器以响应功率的变化，使得当变化时振荡器所看到的电容量总和没有改变 发生电力。

公开(公告)号：US08073417B2

公开(公告)日：2011-12-06

申请号：US11618835

申请日：2006-12-31

Applicant: Yuyu Chang ,  Arya Behzad

Inventor： Yuyu Chang ,  Arya Behzad

IPC: H04B1/18 ,  H04B1/28 ,  H04B7/00

CPC classification number: H04B1/18 ,  H03F3/19 ,  H03F3/45188 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2200/534 ,  H03F2203/45318 ,  H03F2203/45386 ,  H03F2203/45544 ,  H03F2203/45638

Abstract: Aspects of a method and system for a transformer-based high performance cross-coupled low noise amplifier may include one or more circuits that integrate within a single chip, a balun with a low-noise amplifier. A DC current biasing path for the low-noise amplifier may be provided through the integrated balun. The low-noise amplifier may be configured as a cross-coupled low-noise amplifier, where the balun may be directly coupled to the cross-coupled low-noise amplifier. The balun may comprise two or more inductors, wherein one or more of the inductors may provide an electrical path for allowing a DC bias current to flow to ground. Integrating a balun on a single chip with a low-noise amplifier may allow the use of a single received signal input terminal. The biasing voltage may be selected to optimize performance of the low-noise amplifier.

Abstract translation: 用于基于变压器的高性能交叉耦合低噪声放大器的方法和系统的方面可以包括集成在单个芯片内的一个或多个电路，具有低噪声放大器的平衡 - 不平衡变压器。 可以通过集成的平衡 - 不平衡变压器提供用于低噪声放大器的直流电流偏置路径。 低噪声放大器可以被配置为交叉耦合低噪声放大器，其中平衡 - 不平衡变换器可以直接耦合到交叉耦合的低噪声放大器。 平衡 - 不平衡转换器可以包括两个或更多个电感器，其中一个或多个电感器可以提供用于允许DC偏置电流流向地的电路径。 将单芯片上的平衡 - 不平衡变换器与低噪声放大器集成可能允许使用单个接收信号输入端子。 可以选择偏置电压以优化低噪声放大器的性能。

公开(公告)号：US20080136521A1

公开(公告)日：2008-06-12

申请号：US11694266

申请日：2007-03-30

Applicant: Yuyu Chang

Inventor： Yuyu Chang

IPC: H03F3/45

CPC classification number: H03F3/193 ,  H03F1/223 ,  H03F1/26 ,  H03F3/45179 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45166 ,  H03F2203/45668 ,  H03F2203/45704

Abstract: Aspects of a method and system for a low power fully differential noise canceling low noise amplifier (NC LNA) are provided. The NC LNA may receive signals via a single ended input and may generate an amplified symmetric differential output from the received signals. The NC LNA may utilize capacitor dividers, such as a capacitor bank, in the single ended input in order to provide impedance transformation that enables low power operation and matching to an input port. The NC LNA may generate one portion of the amplified symmetric differential output via a voltage divider, which may comprise a plurality of capacitors, such as a capacitor bank. The NC LNA may be implemented utilizing one or more circuits.

Abstract translation: 提供了低功耗全差分噪声消除低噪声放大器（NC LNA）的方法和系统的方面。 NC LNA可以经由单端输入接收信号，并且可以从接收到的信号产生放大的对称差分输出。 NC LNA可以在单端输入中使用诸如电容器组的电容器分配器，以便提供能够进行低功率操作和与输入端口匹配的阻抗变换。 NC LNA可以经由分压器产生放大的对称差分输出的一部分，分压器可以包括多个电容器，例如电容器组。 NC LNA可以利用一个或多个电路来实现。