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1. 发明申请

WO2011006014A1 USING LO SHIFTING TO PREVENT A LOCAL TRANSCEIVER FROM INTERFERING WITH AN FM RADIO 审中-公开
标题翻译：使用自动转换功能防止本地收发器与FM无线电干扰
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
申请人： QUALCOMM INCORPORATED , TRIKHA, Pushp, K. , BLESSENT, Luca , LI, Xiaoyong , APTE, Rahul, A.
发明人： TRIKHA, Pushp, K. , BLESSENT, Luca , LI, Xiaoyong , APTE, Rahul, A.
IPC分类号： H04B1/10 , H04B1/14 , H04B1/38 , H04B15/04
CPC分类号： H04B1/1036 , H04B1/14 , H04B1/3805 , H04B15/04
摘要： 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.
摘要翻译：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。

2. 发明申请

WO2011100539A1 WIDE BAND LNA WITH NOISE CANCELING 审中-公开
标题翻译：宽带上弦与噪音消除
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
申请人： QUALCOMM INCORPORATED , ZENG, Yi , LI, Xiaoyong , APTE, Rahul A.
发明人： ZENG, Yi , LI, Xiaoyong , APTE, Rahul A.
IPC分类号： H03F1/26 , H03F3/195 , H03F1/42 , H03F3/347 , H03F3/21 , H03F3/02
CPC分类号： H03F1/0205 , H01B3/004 , H03F1/26 , H03F1/42 , H03F3/195 , H03F3/211 , H03F3/347 , H03F2200/294 , H03F2200/36 , H03F2200/372 , H03F2200/451
摘要： 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.
摘要翻译：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。

3. 发明申请

WO2010108030A3 COMMON-GATE COMMON-SOURCE AMPLIFIER 审中-公开
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
申请人： QUALCOMM INCORPORATED , LI, Xiaoyong , APTE, Rahul A.
发明人： LI, Xiaoyong , APTE, Rahul A.
IPC分类号： H03F1/26 , H03F3/193 , H03F3/45
摘要： 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.

4. 发明申请

WO2011060322A1 ACTIVE ANALOG FILTER HAVING A MOS CAPACITOR DEVICE WITH IMPROVED LINEARITY 审中-公开
标题翻译：具有改善线性的MOS电容器的主动模拟滤波器
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
申请人： QUALCOMM Incorporated , PARK, Sunghyun , LI, Xiaoyong , PAN, Tzu-wang
发明人： PARK, Sunghyun , LI, Xiaoyong , PAN, Tzu-wang
IPC分类号： H03H11/12
CPC分类号： H03H11/126
摘要： 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.
摘要翻译：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。

5. 发明申请

WO2010068926A1 TECHNIQUES FOR IMPROVING AMPLIFIER LINEARITY 审中-公开
标题翻译：改善放大器线性度的技术
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
申请人： QUALCOMM Incorporated , LI, Xiaoyong , LEE, Sang-Oh , CONROY, Cormac S.
发明人： LI, Xiaoyong , LEE, Sang-Oh , CONROY, Cormac S.
IPC分类号： H03F1/22 , H03F1/32 , H03F3/19 , H03F3/21
CPC分类号： H03F1/223 , H03F1/3205 , H03F3/19 , H03F3/211 , H03F2200/168 , H03F2200/294 , H03F2200/456 , H03F2200/492
摘要： 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.
摘要翻译：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。

6. 发明申请

WO2014018905A1 IMPROVED LINEARITY IN PASSIVE MIXER CIRCUITS 审中-公开
标题翻译：无源混频器电路改进的线性度
公开(公告)号：WO2014018905A1
公开(公告)日：2014-01-30
申请号：PCT/US2013/052358
申请日：2013-07-26
申请人： QUALCOMM INCORPORATED
发明人： GAN, Haitao , LI, Xiaoyong
IPC分类号： H03D3/00 , H03D7/14 , H03D7/16
CPC分类号： H04B1/12 , H03D3/009 , H03D7/1441 , H03D7/1458 , H03D7/1466 , H03D7/1491 , H03D7/165 , H03D2200/0023 , H03D2200/0088 , H04B1/16
摘要： A circuit used in a mixer configured to receive a signal made up of a relatively small modulation signal and a relatively large carrier signal is described. The mixer includes multiple switches. A balancing circuit configured to receive a supply voltage and a clocking signal is provided, and the balancing circuit provides a control signal to a switch in the mixer. The balancing circuit includes a capacitor configured to receive and selectively dissipate charge as a gate voltage along a gate path. The control signal causes switching of the switch in the mixer at times in accordance with the clocking signal according to a voltage difference value between a source voltage and the gate voltage, wherein the voltage difference value between the source voltage and the gate voltage is approximately a predetermined voltage value greater than a turn on voltage level of the switch.
摘要翻译：描述了用于接收由相对小的调制信号和较大载波信号组成的信号的混频器中使用的电路。混音器包括多个开关。提供了一种被配置为接收电源电压和时钟信号的平衡电路，并且平衡电路向混频器中的开关提供控制信号。平衡电路包括被配置为沿着栅极路径接收和选择性地耗散电荷作为栅极电压的电容器。控制信号根据源电压和栅极电压之间的电压差值，根据时钟信号，在混频器中切换开关，其中源极电压和栅极电压之间的电压差大约为预定的电压值大于开关的接通电压电平。

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