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    Generation of virtual local oscillator inputs for use in direct conversion radio systems
    1.
    发明授权
    Generation of virtual local oscillator inputs for use in direct conversion radio systems 有权
    生成用于直接转换无线电系统的虚拟本地振荡器输入

    公开(公告)号：US06727764B2

    公开(公告)日：2004-04-27

    申请号：US10096147

    申请日：2002-03-08

    Applicant: Tajinder Manku ,  Stephen Arnold Devison ,  Christopher E. Snyder

    Inventor： Tajinder Manku ,  Stephen Arnold Devison ,  Christopher E. Snyder

    IPC: H03B100

    CPC classification number: H03L7/0995 ,  H03J2200/17 ,  H03L7/18

    Abstract: The invention provides a system and method of generating a number of inputs to the mixer elements in a direct conversion (homodyne) receiver configuration using Virtual Local Oscillator (VLO) techniques. These generated inputs meet the requirement that they must have a fixed and stable phase-relationship, as well as being correctly related in terms of their power spectra relative to the operating radio (RF), intermediate (IF), and baseband frequencies of the system, and that when applied to the mixer elements they permit the mixer elements to create internally the effect of applying the Local Oscillator signal at a suitable frequency.

    Abstract translation: 本发明提供了一种使用虚拟本地振荡器（VLO）技术在直接转换（零差）接收器配置中向混频器元件生成多个输入的系统和方法。 这些产生的输入满足了它们必须具有固定和稳定的相位关系的要求，并且在功率谱相对于系统的操作无线电（RF），中间（IF）和基带频率方面正确地相关 ，并且当应用到混频器元件时，它们允许混频器元件在内部产生以适当频率施加本地振荡器信号的效果。

    Generation of virtual local oscillator inputs for use in direct conversion radio systems
    2.
    发明申请
    Generation of virtual local oscillator inputs for use in direct conversion radio systems 有权
    生成用于直接转换无线电系统的虚拟本地振荡器输入

    公开(公告)号：US20030169116A1

    公开(公告)日：2003-09-11

    申请号：US10096147

    申请日：2002-03-08

    Inventor： Tajinder Manku ,  Stephen Arnold Devison ,  Christopher E. Snyder

    IPC: H03B001/00

    CPC classification number: H03L7/0995 ,  H03J2200/17 ,  H03L7/18

    Abstract: The invention provides a system and method of generating a number of inputs to the mixer elements in a direct conversion (homodyne) receiver configuration using Virtual Local Oscillator (VLO) techniques. These generated inputs meet the requirement that they must have a fixed and stable phase-relationship, as well as being correctly related in terms of their power spectra relative to the operating radio (RF), intermediate (IF), and baseband frequencies of the system, and that when applied to the mixer elements they permit the mixer elements to create internally the effect of applying the Local Oscillator signal at a suitable frequency

    Abstract translation: 本发明提供了一种使用虚拟本地振荡器（VLO）技术在直接转换（零差）接收器配置中向混频器元件生成多个输入的系统和方法。 这些产生的输入满足了它们必须具有固定和稳定的相位关系的要求，并且在功率谱相对于系统的操作无线电（RF），中间（IF）和基带频率方面正确地相关 ，并且当应用到混频器元件时，它们允许混频器元件在内部产生以适当频率施加本地振荡器信号的效果

    Regenerative divider for up and down conversion of radio frequency (rf) signals
    4.
    发明申请
    Regenerative divider for up and down conversion of radio frequency (rf) signals 有权
    射频（rf）信号的上下转换的再生分压器

    公开(公告)号：US20060246861A1

    公开(公告)日：2006-11-02

    申请号：US10541120

    申请日：2004-01-08

    Applicant: Sathwant Dosanjh ,  William Kung ,  Tajinder Manku

    Inventor： Sathwant Dosanjh ,  William Kung ,  Tajinder Manku

    IPC: H03J7/32

    CPC classification number: H03B21/00 ,  H03B21/01 ,  H03B27/00 ,  H03D3/007 ,  H03H7/21 ,  H03H2007/0192 ,  H03J2200/17 ,  H03J2200/40 ,  H04B1/30

    Abstract: The present invention relates generally to communications, and more specifically to a method and apparatus for generating local oscillator signals used for up- and down-conversion of RF (radio frequency) signals. A major problem in the design of modulators and demodulators, if the leakage of local oscillator (LO) signals into the received signal path. The invention presents a number of highly integratable circuits which resolve the LO leakage problem, using regenerative divider circuits acting on oscillator signals which are running at a multiple or fraction of the frequency of the desired LO signal, to generate in-phase (I) and quadrature (Q) mixing signals. Embodiments of these circuits also use harmonic subtraction and polyphase mixers, as well as virtual local oscillator TM (VLO) mixing signals. VLO mixing signals are signal pairs which emulate local oscillator signals by means of complementary mono-tonal and multi-tonal mixing signals.

    Abstract translation: 本发明一般涉及通信，更具体地涉及用于产生用于RF（射频）信号的上变频和下变频的本地振荡器信号的方法和装置。 如果本地振荡器（LO）信号泄漏到接收信号路径中，调制器和解调器的设计中的主要问题。 本发明提出了许多高度可积分的电路，其解决了LO泄漏问题，使用作用于振荡器信号的再生分压器电路，该振荡器信号以期望LO信号的频率的多个或几分之一运行，以产生同相（I）和 正交（Q）混频信号。 这些电路的实施例也使用谐波减法和多相混频器，以及虚拟本地振荡器TM（VLO）混频信号。 VLO混合信号是通过互补单声道和多音调混合信号模拟本地振荡器信号的信号对。

    Frequency converter
    5.
    发明授权
    Frequency converter 失效
    频率转换器

    公开(公告)号：US06671505B1

    公开(公告)日：2003-12-30

    申请号：US09544616

    申请日：2000-04-06

    Applicant: Haruhiko Koizumi

    Inventor： Haruhiko Koizumi

    IPC: H04B138

    CPC classification number: H03D7/125 ,  H03J2200/17

    Abstract: A frequency converter includes: a first terminal through which a local oscillator signal is input; a second terminal through which an input signal with a frequency to be converted is input; a third terminal through which an output signal with a different frequency resulting from the conversion is output; and a field effect transistor with gate, source and drain terminals for converting the frequency of the input signal and outputting the signal with the different frequency as the output signal. The gate terminal is connected to the first terminal, while the drain terminal is connected to the second and third terminals. The frequency converter further includes a trap circuit, which resonates at a frequency of a harmonic of the local oscillator signal to substantially eliminate the harmonic.

    Abstract translation: 一种变频器包括：输入本地振荡器信号的第一端子; 输入具有待转换频率的输入信号的第二端子; 输出由转换产生的具有不同频率的输出信号的第三端子; 以及具有栅极，源极和漏极端子的场效应晶体管，用于转换输入信号的频率并输出具有不同频率的信号作为输出信号。 栅极端子连接到第一端子，而漏极端子连接到第二和第三端子。 变频器还包括陷波电路，其以本地振荡器信号的谐波频率谐振，以基本上消除谐波。

    Receiver
    7.
    发明申请
    Receiver 失效
    接收器

    公开(公告)号：US20040176057A1

    公开(公告)日：2004-09-09

    申请号：US10482011

    申请日：2003-12-23

    Inventor： Hiroshi Miyagi

    IPC: H04B001/00

    CPC classification number: H04B1/28 ,  H03J5/00 ,  H03J2200/17 ,  H04B1/26 ,  H04B15/04 ,  H04B15/06 ,  H04B2215/065

    Abstract: A receiver in which the sneaking noise from a crystal oscillator is reduced. A high-frequency amplifier circuit 11, a mixing circuit 12, a local oscillator 13, intermediate-frequency filters 14 and 16, an intermediate-frequency amplifier circuit 15, a limit circuit 17, an FM detection circuit 18, and a stereo demodulation circuit 19, an oscillator 20, and a PLL circuit 21 all constituting an FM receiver are provided as a one-chip component 10. A crystal oscillator 31 as an external component is connected to the oscillator 20. The natural-oscillation frequency of the crystal oscillator 31 is so set that the fundamental component and its harmonics are out of the reception band.

    Abstract translation: 来自晶体振荡器的噪音降低的接收器。 高频放大器电路11，混合电路12，本地振荡器13，中频滤波器14和16，中频放大器电路15，限位电路17，FM检测电路18和立体声解调电路 如图19所示，构成FM接收器的振荡器20和PLL电路21被提供为单片元件10.作为外部元件的晶体振荡器31连接到振荡器20.晶体振荡器的固有振荡频率 31的设定使得基本分量及其谐波不在接收频带内。

    Radio-frequency receiver
    8.
    发明申请
    Radio-frequency receiver 审中-公开
    射频接收机

    公开(公告)号：US20020055344A1

    公开(公告)日：2002-05-09

    申请号：US09941558

    申请日：2001-08-30

    Inventor： Mamoru Shimoda

    IPC: H04B001/06

    CPC classification number: H03D7/00 ,  H03J5/02 ,  H03J5/0272 ,  H03J2200/17 ,  H04B1/26 ,  H04B1/30

    Abstract: A radio-frequency receiver mixes a received radio-frequency signal with a local signal in a mixer to convert the radio-frequency signal into an intermediate-frequency signal or baseband signal. In this radio-frequency receiver, a frequency multiplier circuit multiplies the frequency of the output signal of a VCO and feeds the resulting signal as the local signal to the mixer. The output level of the frequency multiplier circuit is switched by a level switcher circuit, which is controlled by a tuning controller according to the received frequency. The controller also controls a PLL circuit for tuning.

    Abstract translation: 射频接收机将接收的射频信号与混频器中的本地信号混合，将射频信号转换为中频信号或基带信号。 在该射频接收机中，倍频器电路将VCO的输出信号的频率相乘，并将得到的信号作为本地信号馈送到混频器。 倍频电路的输出电平由电平切换电路切换，电平切换电路根据接收频率由调谐控制器控制。 控制器还控制PLL电路进行调谐。

    DEMODULATION DEVICE, RECEPTION DEVICE, AND DEMODULATION METHOD
    9.
    发明申请
    DEMODULATION DEVICE, RECEPTION DEVICE, AND DEMODULATION METHOD 审中-公开
    解调装置，接收装置和解调方法

    公开(公告)号：US20100323648A1

    公开(公告)日：2010-12-23

    申请号：US12745172

    申请日：2008-11-18

    Applicant: Haruka Takano ,  Shigeru Soga

    Inventor： Haruka Takano ,  Shigeru Soga

    IPC: H04B1/18 ,  H03D3/02 ,  H03D3/00

    CPC classification number: H03D3/007 ,  H03J1/0041 ,  H03J2200/17 ,  H04B1/30

    Abstract: A device mitigates reduction in reception performance caused by a harmonic component of a clock used for demodulation. The device includes a tuner performing frequency conversion by multiplying a received signal by a signal having a frequency corresponding to a frequency of a desired signal included in the received signal, and outputting the obtained frequency-converted signal; and a demodulation section generating a demodulated signal by demodulating the frequency-converted signal. The demodulation section operates in response to a master clock having a frequency corresponding to the frequency of the desired signal.

    Abstract translation: 一种器件减轻了由用于解调的时钟的谐波分量引起的接收性能的降低。 该装置包括调谐器，通过将接收信号乘以具有与接收信号中包含的期望信号的频率相对应的频率的信号进行频率转换，并输出所获得的频率转换信号; 以及解调部分，通过对频率转换信号进行解调来产生解调信号。 解调部分响应于具有对应于期望信号的频率的频率的主时钟而工作。

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