公开(公告)号：WO2011100539A1

公开(公告)日：2011-08-18

申请号：PCT/US2011/024516

申请日：2011-02-11

Applicant: QUALCOMM INCORPORATED ,  ZENG, Yi ,  LI, Xiaoyong ,  APTE, Rahul A.

Inventor： ZENG, Yi ,  LI, Xiaoyong ,  APTE, Rahul A.

IPC: H03F1/26 ,  H03F3/195 ,  H03F1/42 ,  H03F3/347 ,  H03F3/21 ,  H03F3/02

CPC classification number: H03F1/0205 ,  H01B3/004 ,  H03F1/26 ,  H03F1/42 ,  H03F3/195 ,  H03F3/211 ,  H03F3/347 ,  H03F2200/294 ,  H03F2200/36 ,  H03F2200/372 ,  H03F2200/451

Abstract: Techniques to improve low noise amplifiers (LNAs) with noise canceling are described. LNA includes a first (24) and a second (26) amplifier which work together to noise cancel the noise generated at an input stage circuit (22). The input stage circuit (22) receives an RF signal and is characterized by a first node and a second node. The first amplifier (24) converts a noise voltage at the first node into a first noise current at an output (220) of the first amplifier (24). The second amplifier (26) is directly coupled to the output of the first amplifier and provides noise canceling by summing the first noise current with a second noise current generated by the second amplifier as a function of the noise voltage at the second node. The proposed techniques eliminate the need for large ac coupling capacitors and reduce the die size occupied by the LNA. The elimination of ac coupling capacitors between amplification stages of the LNA allows current reuse resulting in reduced current consumption.

Abstract translation: 描述了改进具有噪声消除的低噪声放大器（LNA）的技术。 LNA包括第一（24）和第二（26）放大器，其一起工作以抵消在输入级电路（22）处产生的噪声的噪声。 输入级电路（22）接收RF信号，其特征在于第一节点和第二节点。 第一放大器（24）将第一节点处的噪声电压转换为第一放大器（24）的输出端（220）处的第一噪声电流。 第二放大器（26）直接耦合到第一放大器的输出，并且通过将第一噪声电流与由第二放大器产生的第二噪声电流相加作为第二节点处的噪声电压的函数来提供噪声消除。 所提出的技术消除了对大型交流耦合电容器的需要，并且减小了LNA占用的管芯尺寸。 在LNA的放大级之间消除交流耦合电容器允许电流重用，从而减少电流消耗。

公开(公告)号：WO2011060322A1

公开(公告)日：2011-05-19

申请号：PCT/US2010/056615

申请日：2010-11-12

Applicant: QUALCOMM Incorporated ,  PARK, Sunghyun ,  LI, Xiaoyong ,  PAN, Tzu-wang

Inventor： PARK, Sunghyun ,  LI, Xiaoyong ,  PAN, Tzu-wang

IPC: H03H11/12

CPC classification number: H03H11/126

Abstract: An active analog filter (700, 1000) having a MOS capacitor device (730, 1030) with improved linearity is proposed. In an exemplary embodiment, dc bias voltage sources (755, 745) alter the capacitance of MOS varactors (740, 750) connected in anti parallel so that the total capacitance of the MOS capacitor device remains constant or within a range over the voltage range of the filter and the filter linearity is set. In a further exemplary embodiment the output stage (1070) of the operational amplifier circuit (1020) of the active analog filter (1000) is modified so that the dc bias voltage is provided by resistors (1055, 1045) connected to a current source (1060) already existing in the filter. Thus the linearity is set and the die area is significantly reduced.

Abstract translation: 提出了一种具有提高线性度的MOS电容器件（730,1030）的有源模拟滤波器（700,1000）。 在示例性实施例中，直流偏置电压源（755,745）改变以反并联方式连接的MOS可变电抗器（740,750）的电容，使得MOS电容器装置的总电容保持恒定或超过电压范围 滤波器和滤波器线性度被设置。 在另一示例性实施例中，有源模拟滤波器（1000）的运算放大器电路（1020）的输出级（1070）被修改，使得直流偏置电压由连接到电流源的电阻（1055,1045） 1060）已经存在于过滤器中。 因此，设置线性度并且模具面积显着减小。

公开(公告)号：WO2010108030A3

公开(公告)日：2010-09-23

申请号：PCT/US2010/027855

申请日：2010-03-18

Applicant: QUALCOMM INCORPORATED ,  LI, Xiaoyong ,  APTE, Rahul A.

Inventor： LI, Xiaoyong ,  APTE, Rahul A.

IPC: H03F1/26 ,  H03F3/193 ,  H03F3/45

Abstract: Techniques for integrating a common-source and common-gate amplifier topology in a single amplifier design. In one aspect, an input voltage is provided to both a common- source amplifier and a common-gate amplifier. The output voltages of the common- source amplifier and the common-gate amplifier are provided to a difference block for generating a single-ended voltage proportional to the difference between the output voltages. When applied to the design of, e.g., low-noise amplifiers (LNA's), the disclosed techniques may offer improved noise performance over the prior art.

公开(公告)号：WO2010068926A1

公开(公告)日：2010-06-17

申请号：PCT/US2009/067771

申请日：2009-12-11

Applicant: QUALCOMM Incorporated ,  LI, Xiaoyong ,  LEE, Sang-Oh ,  CONROY, Cormac S.

Inventor： LI, Xiaoyong ,  LEE, Sang-Oh ,  CONROY, Cormac S.

IPC: H03F1/22 ,  H03F1/32 ,  H03F3/19 ,  H03F3/21

CPC classification number: H03F1/223 ,  H03F1/3205 ,  H03F3/19 ,  H03F3/211 ,  H03F2200/168 ,  H03F2200/294 ,  H03F2200/456 ,  H03F2200/492

Abstract: Techniques for improving the linearity of a cascode amplifier. In an exemplary embodiment, an auxiliary common-gate amplifier (M5) is provided in parallel with the principal cascode branch (M2). The auxiliary common-gate amplifier (M5) samples a cascoded node (Xl) in the principal cascode branch (M2). The auxiliary common-gate amplifier (M5) generates a current which, when combined with the current generated by the principal cascode branch (M2), cancels a distortion component to generate an output current with improved linearity characteristics. In an exemplary embodiment, a phase shifting network (310) couples the cascoded node (X1) to the auxiliary common-gate amplifier (M5), and may include, e.g., a capacitor coupled to an inductor. Techniques for improving the linearity of a cascode amplifier. In an exemplary embodiment, an auxiliary common-gate amplifier (M5) is provided in parallel with the principal cascode branch (M2). The auxiliary common-gate amplifier (M5) samples a cascoded node (X1) in the principal cascode branch (M2). The auxiliary common-gate amplifier (M5) generates a current which, when combined with the current generated by the principal cascode branch (M2), cancels a distortion component to generate an output current with improved linearity characteristics.

Abstract translation: 提高共源共栅放大器线性度的技术。 在一个示例性实施例中，与主级联共模分支（M2）并联提供辅助共门放大器（M5）。 辅助共栅放大器（M5）在主级联支路（M2）中采样级联的节点（X1）。 辅助共栅放大器（M5）产生电流，当与主级联支路（M2）产生的电流组合时，消除失真分量以产生具有改善的线性特性的输出电流。 在示例性实施例中，相移网络（310）将级联节点（X1）耦合到辅助公共门放大器（M5），并且可以包括例如耦合到电感器的电容器。 提高共源共栅放大器线性度的技术。 在一个示例性实施例中，与主级联共模分支（M2）并联提供辅助共门放大器（M5）。 辅助共栅放大器（M5）对主级联支路（M2）中的级联节点（X1）采样。 辅助共栅放大器（M5）产生电流，当与主级联支路（M2）产生的电流组合时，消除失真分量以产生具有改善的线性特性的输出电流。

公开(公告)号：WO2010108030A2

公开(公告)日：2010-09-23

申请号：PCT/US2010027855

申请日：2010-03-18

Applicant: QUALCOMM INC ,  LI XIAOYONG ,  APTE RAHUL A

Inventor： LI XIAOYONG ,  APTE RAHUL A

IPC: H03F1/26 ,  H03F3/193 ,  H03F3/45

CPC classification number: H03F3/193 ,  H03F1/26 ,  H03F3/3022 ,  H03F3/45179

Abstract: Techniques for integrating a common-source and common-gate amplifier topology in a single amplifier design. In one aspect, an input voltage is provided to both a common- source amplifier and a common-gate amplifier. The output voltages of the common- source amplifier and the common-gate amplifier are provided to a difference block for generating a single-ended voltage proportional to the difference between the output voltages. When applied to the design of, e.g., low-noise amplifiers (LNA's), the disclosed techniques may offer improved noise performance over the prior art.

Abstract translation: 用于在单个放大器设计中集成公共源和公共门放大器拓扑的技术。 在一个方面，输入电压被提供给共源放大器和公共门放大器。 共源放大器和公共栅放大器的输出电压被提供给差分块，用于产生与输出电压之间的差成比例的单端电压。 当应用于例如低噪声放大器（LNA's）的设计时，所公开的技术可以提供比现有技术更好的噪声性能。

公开(公告)号：WO2011006014A1

公开(公告)日：2011-01-13

申请号：PCT/US2010/041435

申请日：2010-07-08

Applicant: QUALCOMM INCORPORATED ,  TRIKHA, Pushp, K. ,  BLESSENT, Luca ,  LI, Xiaoyong ,  APTE, Rahul, A.

Inventor： TRIKHA, Pushp, K. ,  BLESSENT, Luca ,  LI, Xiaoyong ,  APTE, Rahul, A.

IPC: H04B1/10 ,  H04B1/14 ,  H04B1/38 ,  H04B15/04

CPC classification number: H04B1/1036 ,  H04B1/14 ,  H04B1/3805 ,  H04B15/04

Abstract: A cellular telephone includes cellular telephone circuitry and an FM receiver. An FM signal being received is downconverted by a mixer. The downconverted signal is processed to generate an FM signal that is supplied to a digital IF filter. If a blocker emitted by the cellular telephone circuitry would interfere with receiving of the FM signal due to interaction of an LO harmonic with the blocker if a conventional LO frequency were used, then a different LO frequency is used. Subsequent processing of the downconverted FM signal (for example, by a digital complex conjugate selector and an IF rotator) results in the signal supplied to the digital IF filter having the same center frequency as the digital IF filter despite the use of the different LO frequency. In some embodiments, the LO is shifted by different amounts depending on cellular telephone mode and on the FM signal.

Abstract translation: 蜂窝电话包括蜂窝电话电路和FM接收机。 接收的FM信号由混频器下变频。 处理下变频信号以产生提供给数字IF滤波器的FM信号。 如果使用蜂窝电话线路发射的阻塞器将干扰由于LO谐波与阻塞器的相互作用而导致的FM信号的接收，如果使用常规LO频率，则使用不同的LO频率。 下变频FM信号的后续处理（例如，通过数字复共轭选择器和IF旋转器）导致提供给数字IF滤波器的信号具有与数字IF滤波器相同的中心频率，尽管使用不同的LO频率 。 在一些实施例中，根据蜂窝电话模式和FM信号，LO偏移不同的量。