公开(公告)号：US07768359B2

公开(公告)日：2010-08-03

申请号：US12241101

申请日：2008-09-30

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: H03B5/36

CPC classification number: H03B5/36 ,  H03B5/06 ,  H03B2200/0098

Abstract: A differential crystal oscillator circuit uses a bias transistor to generate a bias voltage from a bias current. The bias voltage is supplied to the control terminals of a differential pair of transistors. The differential transistors operate to produce a differential output between corresponding end terminals thereof, which is provided to a reference crystal oscillator to establish an oscillation frequency at the differential output.

Abstract translation: 差分晶体振荡器电路使用偏置晶体管从偏置电流产生偏置电压。 偏置电压被提供给差分晶体管对的控制端子。 差分晶体管的作用是在相应的端子之间产生差分输出，该差分输出被提供给参考晶体振荡器以在差分输出处建立振荡频率。

公开(公告)号：US20100026402A1

公开(公告)日：2010-02-04

申请号：US12241101

申请日：2008-09-30

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: H03B5/36

CPC classification number: H03B5/36 ,  H03B5/06 ,  H03B2200/0098

Abstract: A differential crystal oscillator circuit uses a bias transistor to generate a bias voltage from a bias current. The bias voltage is supplied to the control terminals of a differential pair of transistors. The differential transistors operate to produce a differential output between corresponding end terminals thereof, which is provided to a reference crystal oscillator to establish an oscillation frequency at the differential output.

公开(公告)号：US20090237165A1

公开(公告)日：2009-09-24

申请号：US12474021

申请日：2009-05-28

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: H03F3/16 ,  H03F3/45

CPC classification number: H03F3/45188 ,  H03F3/195 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/45384 ,  H03F2203/45386 ,  H03F2203/45392 ,  H03F2203/45544 ,  H03F2203/45548 ,  H03F2203/45554 ,  H03F2203/45596 ,  H03F2203/45638 ,  H04B1/18

Abstract: Cross-coupled low noise amplifier for cellular applications. A circuitry implementation that includes two pairs of metal oxide semiconductor field-effect transistors (MOSFETs) (either N-type of P-type) operates as an LNA, which can be used within any of a wide variety of communication devices. In one embodiment, this design is particularly adaptable to cellular telephone applications. A majority of the elements are integrated within the design and need not be implemented off-chip, and this can provide for a reduction in area required by the circuitry. A very high output impedance is provided by using two transistors (implemented in a triple well configuration) with resistive source degeneration. A higher than typical power supply voltage can be employed (if desired) to accommodate the voltage drops of the resistors and transistors.

Abstract translation: 用于蜂窝应用的交叉耦合低噪声放大器。 包括两对金属氧化物半导体场效应晶体管（MOSFET）（N型P型）的电路实现作为LNA工作，可以在各种通信设备中使用。 在一个实施例中，该设计特别适用于蜂窝电话应用。 大多数元件集成在设计中，不需要在片外实现，这可以减少电路所需的面积。 通过使用具有电阻源退化的两个晶体管（以三阱配置实现）来提供非常高的输出阻抗。 可以使用高于典型的电源电压（如果需要）以适应电阻器和晶体管的电压降。

公开(公告)号：US07541870B2

公开(公告)日：2009-06-02

申请号：US11874305

申请日：2007-10-18

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: H03F3/45

CPC classification number: H03F3/45188 ,  H03F3/195 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/45384 ,  H03F2203/45386 ,  H03F2203/45392 ,  H03F2203/45544 ,  H03F2203/45548 ,  H03F2203/45554 ,  H03F2203/45596 ,  H03F2203/45638 ,  H04B1/18

Abstract: Cross-coupled low noise amplifier for cellular applications. A circuitry implementation that includes two pairs of metal oxide semiconductor field-effect transistors (MOSFETs) (either N-type of P-type) operates as an LNA, which can be used within any of a wide variety of communication devices. In one embodiment, this design is particularly adaptable to cellular telephone applications. A majority of the elements are integrated within the design and need not be implemented off-chip, and this can provide for a reduction in area required by the circuitry. A very high output impedance is provided by using two transistors (implemented in a triple well configuration) with resistive source degeneration. A higher than typical power supply voltage can be employed (if desired) to accommodate the voltage drops of the resistors and transistors.

公开(公告)号：US08410823B2

公开(公告)日：2013-04-02

申请号：US11619803

申请日：2007-01-04

Applicant: Yuyu Chang ,  Meng-An Pan

Inventor： Yuyu Chang ,  Meng-An Pan

IPC: H02M11/00 ,  H03F3/45

CPC classification number: H03F3/195 ,  H03F1/08 ,  H03F3/191 ,  H03F3/45475 ,  H03F2200/168 ,  H03F2200/451 ,  H03F2200/91 ,  H03F2203/45136

Abstract: Aspects of a method and system for an integrated LC resonant current gain boosting amplifier may include amplifying within a chip, via an on-chip LC current gain circuit, an alternating current (AC) generated by an on-chip voltage-to-current converter, and converting within the chip, via an on-chip current-to-voltage circuit; the amplified alternating current to an output voltage. The on-chip LC current gain circuit comprises only passive components, which may include one or more resistors, one or more capacitors, and one or more inductors.

Abstract translation: 用于集成LC谐振电流增益升压放大器的方法和系统的方面可以包括通过片上LC电流增益电路在芯片内放大由片上电压 - 电流转换器产生的交流（AC） ，并通过片上电流 - 电压电路在芯片内转换; 放大的交流电流达到输出电压。 片上LC电流增益电路仅包括无源部件，其可以包括一个或多个电阻器，一个或多个电容器和一个或多个电感器。

公开(公告)号：US07671685B2

公开(公告)日：2010-03-02

申请号：US11694266

申请日：2007-03-30

Applicant: Yuyu Chang

Inventor： Yuyu Chang

IPC: H03F3/04

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。

公开(公告)号：US20090134942A1

公开(公告)日：2009-05-28

申请号：US11944723

申请日：2007-11-26

Applicant: Yuyu Chang

Inventor： Yuyu Chang

IPC: H03F1/22

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: 具有恒定增益设置的射频放大器。 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：US20080136463A1

公开(公告)日：2008-06-12

申请号：US11619803

申请日：2007-01-04

Applicant: Yuyu Chang ,  Meng-An Pan

Inventor： Yuyu Chang ,  Meng-An Pan

IPC: H02M11/00 ,  H03G3/30

CPC classification number: H03F3/195 ,  H03F1/08 ,  H03F3/191 ,  H03F3/45475 ,  H03F2200/168 ,  H03F2200/451 ,  H03F2200/91 ,  H03F2203/45136

Abstract: Aspects of a method and system for an integrated LC resonant current gain boosting amplifier may include amplifying within a chip, via an on-chip LC current gain circuit, an alternating current (AC) generated by an on-chip voltage-to-current converter, and converting within the chip, via an on-chip current-to-voltage circuit; the amplified alternating current to an output voltage. The on-chip LC current gain circuit comprises only passive components, which may include one or more resistors, one or more capacitors, and one or more inductors.

Abstract translation: 用于集成LC谐振电流增益升压放大器的方法和系统的方面可以包括通过片上LC电流增益电路在芯片内放大由片上电压 - 电流转换器产生的交流（AC） ，并通过片上电流 - 电压电路在芯片内转换; 放大的交流电流达到输出电压。 片上LC电流增益电路仅包括无源部件，其可以包括一个或多个电阻器，一个或多个电容器和一个或多个电感器。

公开(公告)号：US08374560B2

公开(公告)日：2013-02-12

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: H04B1/04

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：US07840198B2

公开(公告)日：2010-11-23

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: H04B1/04

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。