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    PROGRAMMABLE HIGH-SPEED EQUALIZER AND RELATED METHOD
    3.
    发明申请
    PROGRAMMABLE HIGH-SPEED EQUALIZER AND RELATED METHOD 有权
    可编程高速均衡器及相关方法

    公开(公告)号：US20160294383A1

    公开(公告)日：2016-10-06

    申请号：US14792441

    申请日：2015-07-06

    申请人： QUALCOMM, Incorporated

    发明人： Mohammed Mizanur Rahman ,  Jacob Stephen Schneider ,  Thomas Clark Bryan ,  LuVerne Ray Peterson ,  Gregory Francis Lynch ,  Alvin Leng Sun Loke

    IPC分类号： H03K17/687

    CPC分类号： H03K17/687 ,  H03F3/45197 ,  H03F2203/45488 ,  H03F2203/45494 ,  H03F2203/45504 ,  H04L25/0272 ,  H04L25/0292 ,  H04L25/03878

    摘要： A programmable equalizer and related method are provided. The equalizer includes a pair of current-setting field effect transistors (FETs) coupled in series with a pair of input FETs and a pair of load resistors, respectively, between a first voltage rail (Vdd) and a second voltage rail (ground). A programmable equalization circuit is coupled between the sources of the input FETs, comprising a plurality of selectable resistive paths and a variable capacitor, which could also be configured as a plurality of selectable capacitive paths. Each of the selectable resistive paths (as well as each of the selectable capacitive paths) include a selection FET for selectively coupling the corresponding resistive (or capacitive) path between the sources of the input FETs. In the case where one of the input FETs is biased with a reference gate voltage, the source of each selection FET is coupled to the source of such input FET.

    摘要翻译： 提供了可编程均衡器和相关方法。 均衡器包括分别与第一电压轨（Vdd）和第二电压轨（地）之间的一对输入FET和一对负载电阻串联耦合的一对电流设定场效应晶体管（FET）。 可编程均衡电路耦合在输入FET的源极之间，包括多个可选择的电阻路径和可变电容器，其也可以被配置为多个可选择的电容路径。 每个可选择的电阻路径（以及每个可选择的电容路径）包括用于选择性地耦合在输入FET的源极之间的对应的电阻（或电容）路径的选择FET。 在其中一个输入FET被参考栅极电压偏置的情况下，每个选择FET的源极耦合到这种输入FET的源极。

    Programmable high-frequency high-gain equalizer for digital display interfaces
    4.
    发明申请
    Programmable high-frequency high-gain equalizer for digital display interfaces 审中-公开
    可编程高频高增益均衡器，用于数字显示接口

    公开(公告)号：US20120188031A1

    公开(公告)日：2012-07-26

    申请号：US12931059

    申请日：2011-01-25

    申请人： Xiaojiang Wu ,  Yiqin Meng

    发明人： Xiaojiang Wu ,  Yiqin Meng

    IPC分类号： H04B3/14 ,  H03F3/191

    CPC分类号： H04B3/145 ,  H03F3/45197 ,  H03F2203/45492 ,  H03F2203/45494 ,  H03F2203/45504 ,  H03F2203/45652

    摘要： There is provided a programmable high-frequency high-gain equalizer for digital display interfaces comprising, two pairs of current sources; two pairs of transistors arranged as two differential pairs, each transistor connected to a different one of the current sources; and a pair of a negative impedance resistors connected to the two pairs of two differential pairs; and a pair of capacitive and programmable resistive degeneration connected to the two pairs of two differential pairs to optimize the equalizer gain.

    摘要翻译： 提供了一种用于数字显示接口的可编程高频高增益均衡器，包括两对电流源; 两对晶体管布置成两个差分对，每个晶体管连接到不同的一个电流源; 和一对连接到两对差分对的负阻抗电阻; 以及一对连接到两对差分对的电容和可编程电阻退化，以优化均衡器增益。

    Low Noise Amplifier with Current Bleeding Branch
    5.
    发明申请
    Low Noise Amplifier with Current Bleeding Branch 有权
    低噪声放大器，具有电流出血分支

    公开(公告)号：US20120025911A1

    公开(公告)日：2012-02-02

    申请号：US12894144

    申请日：2010-09-30

    申请人： Zhongwu Zhao ,  Xiaodong Jin

    发明人： Zhongwu Zhao ,  Xiaodong Jin

    IPC分类号： H03F1/22 ,  H03F3/45 ,  H03F3/04

    CPC分类号： H03F3/45201 ,  H03F1/223 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/45336 ,  H03F2203/45491 ,  H03F2203/45494 ,  H03F2203/45696 ,  H03F2203/45726 ,  H03G1/0029

    摘要： An LNA circuit for providing a wide range of gain while maintaining the output headroom. In a radio frequency (RF) receiver, the signal received by the receiver may be extremely small. For a transmitter in a short distance, the received signal may be relatively strong. A low power amplifier usually is used to amplify the input signal. The LNA has to be designed to accommodate a wide range of gain. A convention LNA circuit supporting a wide range of gain often suffers from reduced output headroom due to increased current through the load resistor. The present invention discloses the use of current bleeding branch to allow a portion of current to flow through the current bleeding branch and consequently reduces the current that would have flown through the load resistor. Consequently, the voltage across the load resistor may be maintained low to allow adequate output headroom.

    摘要翻译： LNA电路，用于提供宽范围的增益，同时保持输出净空。 在射频（RF）接收机中，由接收机接收的信号可能非常小。 对于短距离的发射机，接收的信号可能相对较强。 低功率放大器通常用于放大输入信号。 LNA必须设计成适应广泛的收益。 支持宽范围增益的常规LNA电路通常由于通过负载电阻的电流增加而导致输出净空减少。 本发明公开了使用流出血分支以允许电流的一部分流过电流出血支路，从而减少了将流过负载电阻器的电流。 因此，可以将负载电阻器两端的电压维持在低电平以允许足够的输出净空。

    Transconductance amplifier
    6.
    发明授权
    Transconductance amplifier 有权
    跨导放大器

    公开(公告)号：US08058909B2

    公开(公告)日：2011-11-15

    申请号：US12950462

    申请日：2010-11-19

    申请人： Hiroyuki Okada

    发明人： Hiroyuki Okada

    IPC分类号： H02M11/00

    CPC分类号： H03L7/099 ,  H03F3/45179 ,  H03F3/45197 ,  H03F2203/45288 ,  H03F2203/45481 ,  H03F2203/45494 ,  H03L7/0805

    摘要： The present invention is intended to achieve a transconductance amplifier and a voltage/current converting method which can provide a sufficient amplitude and a high degree of design freedom. The method comprises the steps of converting a first voltage signal to a first current signal; converting a second voltage signal to a second current signal; obtaining the common-mode components of the first and second current signals; and subtracting the common-mode components from the first and second current signals to obtain third and fourth signals, and further, subtracting the fourth current signal from the third current signal to generate a first output, while subtracting the third current signal from the fourth current signal to generate a second output.

    摘要翻译： 本发明旨在实现能够提供足够的幅度和高度设计自由度的跨导放大器和电压/电流转换方法。 该方法包括以下步骤：将第一电压信号转换成第一电流信号; 将第二电压信号转换为第二电流信号; 获得第一和第二电流信号的共模分量; 以及从第一和第二电流信号中减去共模分量以获得第三和第四信号，并且还从第三电流信号中减去第四电流信号以产生第一输出，同时从第四电流减去第三电流信号 信号以产生第二输出。

    Current converting method, transconductance amplifier and filter circuit using the same
    7.
    发明授权
    Current converting method, transconductance amplifier and filter circuit using the same 有权
    电流转换方法，跨导放大器和使用其的滤波电路

    公开(公告)号：US07863945B2

    公开(公告)日：2011-01-04

    申请号：US11994792

    申请日：2006-06-22

    申请人： Hiroyuki Okada

    发明人： Hiroyuki Okada

    IPC分类号： H02M11/00

    CPC分类号： H03L7/099 ,  H03F3/45179 ,  H03F3/45197 ,  H03F2203/45288 ,  H03F2203/45481 ,  H03F2203/45494 ,  H03L7/0805

    摘要： The present invention is intended to achieve a transconductance amplifier and a voltage/current converting method which can provide a sufficient amplitude and a high degree of design freedom. The method comprises the steps of converting a first voltage signal to a first current signal; converting a second voltage signal to a second current signal; obtaining the common-mode components of the first and second current signals; and subtracting the common-mode components from the first and second current signals to obtain third and fourth signals, and further, subtracting the fourth current signal from the third current signal to generate a first output, while subtracting the third current signal from the fourth current signal to generate a second output.

    摘要翻译： 本发明旨在实现能够提供足够的幅度和高度设计自由度的跨导放大器和电压/电流转换方法。 该方法包括以下步骤：将第一电压信号转换成第一电流信号; 将第二电压信号转换为第二电流信号; 获得第一和第二电流信号的共模分量; 以及从第一和第二电流信号中减去共模分量以获得第三和第四信号，并且还从第三电流信号中减去第四电流信号以产生第一输出，同时从第四电流减去第三电流信号 信号以产生第二输出。

    Method and apparatus for a high bandwidth amplifier with wide band peaking
    8.
    发明授权
    Method and apparatus for a high bandwidth amplifier with wide band peaking 有权
    具有宽带峰值的高带宽放大器的方法和装置

    公开(公告)号：US07839212B2

    公开(公告)日：2010-11-23

    申请号：US12327865

    申请日：2008-12-04

    申请人： Dawei Huang ,  Arif Amin ,  Waseem Ahmad ,  Rajesh Kumar ,  Venkatesh Arunachalam

    发明人： Dawei Huang ,  Arif Amin ,  Waseem Ahmad ,  Rajesh Kumar ,  Venkatesh Arunachalam

    IPC分类号： H03F3/45

    CPC分类号： H03G1/0029 ,  H03F3/45197 ,  H03F2200/411 ,  H03F2200/453 ,  H03F2203/45491 ,  H03F2203/45492 ,  H03F2203/45494 ,  H03F2203/45511 ,  H03F2203/45652 ,  H03F2203/45702 ,  H04L25/0272

    摘要： A two stage fully differential amplifier has been designed which works, in tandem with a TX-FIR, as a linear equalizer at low frequencies, not covered by the TX-FIR, and also acts as a linear amplifier at higher frequencies which are equalized by the TX-FIR. The amplifier as a frequency response which does not attenuate signals frequencies less than one twentieth of baud rate, creates gain peaking ion the region between one twentieth and one tenth of baud rate and maintains flat peak gain up to half of baud rate. Different aspects of the frequency response curve (such as dc gain, max gain and zero frequency) are completely programmable. Also, the differential amplifier has been designed from low power and process, voltage and temperature insensitive frequency response.

    摘要翻译： 已经设计了一个两级全差分放大器，它与TX-FIR一起作为低频的线性均衡器工作，不被TX-FIR覆盖，并且还作为较高频率的线性放大器，它们被均衡 TX-FIR。 作为频率响应的放大器，其不会衰减信号频率小于波特率的二十分之一，从而使波峰率的二分之一到十分之一的区域产生增益峰值，并将平坦的峰值增益保持在一半以上的波特率。 频率响应曲线（如直流增益，最大增益和零频率）的不同方面是完全可编程的。 此外，差分放大器是从低功耗和工艺，电压和温度不敏感的频率响应设计的。

    Increased sensitivity and reduced offset variation in high data rate HSSI receiver
    9.
    发明授权
    Increased sensitivity and reduced offset variation in high data rate HSSI receiver 有权
    在高数据速率HSSI接收机中增加灵敏度和减少偏移变化

    公开(公告)号：US07777526B2

    公开(公告)日：2010-08-17

    申请号：US12134777

    申请日：2008-06-06

    申请人： Sergey Shumarayev ,  Thungoc M. Tran ,  Wilson Wong ,  Simardeep Maangat

    发明人： Sergey Shumarayev ,  Thungoc M. Tran ,  Wilson Wong ,  Simardeep Maangat

    IPC分类号： H03K19/094

    CPC分类号： H03K19/018514 ,  H03F3/45197 ,  H03F2203/45494 ,  H03F2203/45686

    摘要： Signal offset variation caused by transistor variation/mismatch in integrated circuits may be reduced. In one embodiment, a buffer circuit has variable-valued circuit elements. Offset variation measurements are made and the variable-valued circuit elements are calibrated to reduce the measured offset variation. In another embodiment, each amplifying stage of a multi-stage buffer provides variable gain. The total DC gain of the cascade is distributed unevenly across the stages, with more DC gain being provided by amplifier stages at the beginning of the cascade than at the end. An additional pre-amplifier stage can also be provided at the beginning of the cascade.

    摘要翻译： 集成电路中晶体管变化/失配引起的信号偏移变化可能会降低。 在一个实施例中，缓冲电路具有可变值电路元件。 进行偏移变化测量，并校准可变值电路元件以减少测量的偏移变化。 在另一个实施例中，多级缓冲器的每个放大级提供可变增益。 级联的总直流增益不均匀地分布在整个级中，在级联开始时比放大器级提供更多的直流增益。 在级联开始时也可以提供一个额外的前级放大器级。