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    • 5. 发明申请
    • METHOD AND APPARATUS FOR MITIGATING VCO PULLING
    • 减轻VCO拉拔的方法和装置
    • US20100026395A1
    • 2010-02-04
    • US12184728
    • 2008-08-01
    • Mark Vernon Lane
    • Mark Vernon Lane
    • H03L7/24
    • H04B1/0475
    • Techniques for mitigating VCO pulling are described. In an aspect, VCO pulling may be mitigated by (i) injecting an oscillator signal, which is a version of a VCO signal from a VCO, into a transmitter and (ii) using coupling paths from the transmitter to the VCO to re-circulate the oscillator signal back to the VCO. In one design, an apparatus includes a VCO and a coupling circuit. The VCO generates a VCO signal at N times a desired output frequency. The coupling circuit receives an oscillator signal generated based on the VCO signal and injects the oscillator signal into a transmitter to mitigate pulling of the frequency of the VCO due to undesired coupling from the transmitter to the VCO. The apparatus may include a phase adjustment circuit that adjusts the phase of the oscillator signal and/or an amplitude adjustment circuit that adjusts the amplitude of the oscillator signal.
    • 描述了减轻VCO牵引的技术。 在一个方面,可以通过(i)将来自VCO的VCO信号的版本的振荡器信号注入到发射机中,以及(ii)使用从发射机到VCO的耦合路径来重新流通 振荡器信号回到VCO。 在一种设计中,一种装置包括VCO和耦合电路。 VCO产生N次所需输出频率的VCO信号。 耦合电路接收基于VCO信号产生的振荡器信号,并将振荡器信号注入到发射机中以减轻由于从发射机到VCO的不期望的耦合而导致的VCO的频率的拉动。 该装置可以包括调整振荡器信号的相位的相位调整电路和/或调整振荡器信号的幅度的幅度调整电路。
    • 6. 发明授权
    • Apparatus and method for wireless communications
    • 无线通信的装置和方法
    • US06366622B1
    • 2002-04-02
    • US09305330
    • 1999-05-04
    • Stephen Joseph BrownAndrew Xavier EstradaTerrance R. BourkSteven R. NorsworthyPatrick J. MurphyChristopher Dennis HullGlenn ChangMark Vernon LaneJorge A. Grilo
    • Stephen Joseph BrownAndrew Xavier EstradaTerrance R. BourkSteven R. NorsworthyPatrick J. MurphyChristopher Dennis HullGlenn ChangMark Vernon LaneJorge A. Grilo
    • H04B130
    • H04B1/30
    • An apparatus for receiving signals includes a low noise amplifier (LNA) configured to receive a radio frequency (RF) signal. An I/Q direct down converter is coupled to the LNA. The I/Q direct down converter is configured to split the RF signal into real and imaginary components and to down convert the real and imaginary components directly to baseband signals. A local oscillator (LO) is coupled to the I/Q direct down converter and is configured to drive the I/Q direct down converter. First and second filters are coupled to the I/Q direct down converter. The first and second filters are configured to filter the down converted real and imaginary components, respectively. First and second analog-to-digital converters (ADCs) are coupled to the first and second filters, respectively. The first and second ADCs are configured to convert the real and imaginary components into digital signals. The first and second ADCs have a dynamic range that is wide enough to convert the filtered, down converted real and imaginary components to digital signals without using variable gain on the filtered and down converted real and imaginary components. An apparatus for use in wireless communications includes a radio, a modem and a controller integrated onto a single integrated circuit (IC). The radio includes a receiver for receiving data and a transmitter for transmitting data. The modem is coupled to the radio and is configured to demodulate received data and modulate data for transmission. The controller is coupled to the modem and includes a digital interface for external communications through which received data and data for transmission is sent, a connection state machine configured to accept commands through the digital interface and to respond to the commands by initiating a sequence, and a receive/transmit state machine configured to perform state control of the radio in response to the initiated sequence.
    • 用于接收信号的装置包括被配置为接收射频(RF)信号的低噪声放大器(LNA)。 I / Q直接下变频器耦合到LNA。 I / Q直接下变频器被配置为将RF信号分成实部和虚部,并将实部和虚部分直接转换为基带信号。 本地振荡器(LO)耦合到I / Q直接下变频器,并被配置为驱动I / Q直接下变频器。 第一和第二滤波器耦合到I / Q直接下变频器。 第一和第二滤波器被配置为分别对下变换的实部和虚部进行滤波。 第一和第二模数转换器(ADC)分别耦合到第一和第二滤波器。 第一和第二ADC被配置为将实部和虚部转换为数字信号。 第一和第二ADC具有足够宽的动态范围,以将滤波的,下变换的实分量和虚分量转换为数字信号,而不对滤波和下变换的实分量和虚分量进行可变增益。 用于无线通信的装置包括集成在单个集成电路(IC)上的无线电,调制解调器和控制器。 无线电设备包括用于接收数据的接收机和用于发送数据的发射机。 调制解调器耦合到无线电设备,并被配置为对接收到的数据进行解调并调制数据进行传输。 控制器耦合到调制解调器,并且包括用于外部通信的数字接口,通过该数字接口发送接收的数据和用于发送的数据,连接状态机被配置为通过数字接口接受命令并且通过发起序列来响应命令,以及 接收/发送状态机,被配置为响应于所启动的序列来执行无线电的状态控制。
    • 8. 发明授权
    • Method and apparatus for mitigating VCO pulling
    • 减轻VCO牵引的方法和装置
    • US08044734B2
    • 2011-10-25
    • US12184728
    • 2008-08-01
    • Mark Vernon Lane
    • Mark Vernon Lane
    • H03B5/20
    • H04B1/0475
    • Techniques for mitigating VCO pulling are described. In an aspect, VCO pulling may be mitigated by (i) injecting an oscillator signal, which is a version of a VCO signal from a VCO, into a transmitter and (ii) using coupling paths from the transmitter to the VCO to re-circulate the oscillator signal back to the VCO. In one design, an apparatus includes a VCO and a coupling circuit. The VCO generates a VCO signal at N times a desired output frequency. The coupling circuit receives an oscillator signal generated based on the VCO signal and injects the oscillator signal into a transmitter to mitigate pulling of the frequency of the VCO due to undesired coupling from the transmitter to the VCO. The apparatus may include a phase adjustment circuit that adjusts the phase of the oscillator signal and/or an amplitude adjustment circuit that adjusts the amplitude of the oscillator signal.
    • 描述了减轻VCO牵引的技术。 在一个方面,可以通过(i)将来自VCO的VCO信号的版本的振荡器信号注入到发射机中,以及(ii)使用从发射机到VCO的耦合路径来重新流通 振荡器信号回到VCO。 在一种设计中,一种装置包括VCO和耦合电路。 VCO产生N次所需输出频率的VCO信号。 耦合电路接收基于VCO信号产生的振荡器信号,并将振荡器信号注入到发射机中以减轻由于从发射机到VCO的不期望的耦合而导致的VCO的频率的拉动。 该装置可以包括调整振荡器信号的相位的相位调整电路和/或调整振荡器信号的幅度的幅度调整电路。
    • 9. 发明授权
    • Zero intermediate frequency receiver
    • 零中频接收机
    • US5715281A
    • 1998-02-03
    • US603533
    • 1996-02-21
    • Stephen Bly, deceasedMark Vernon LaneWilliam Mark Siddall
    • Stephen Bly, deceasedMark Vernon LaneWilliam Mark Siddall
    • H03J7/04H04L27/06
    • H03J7/04
    • A zero intermediate frequency radio receiver that comprises mixing stages, an A to D converter, a digital demodulator, a carrier tracking system and a carrier nulling system is disclosed. The mixing stages receive FM or PM signals and produce analogue in-phase and quadrature baseband signal which are in turn converted to digital baseband signals by the A to D convertor. DC offsets in the baseband signals are removed by high pass filtering prior to demodulation. Tracking enables the baseband signals to be maintained at a centre frequency of substantially zero hertz, while signal strength at this frequency is minimized or mulled before the DC offset filtering. Information which might otherwise be removed by the filtering is thereby retained in the baseband signals, which are relatively less distorted.
    • 公开了一种包括混合级,A至D转换器,数字解调器,载波跟踪系统和载波归零系统的零中频无线电接收机。 混频阶段接收FM或PM信号,并产生模拟同相和正交基带信号,然后由A转D转换器转换为数字基带信号。 在解调之前,通过高通滤波去除基带信号中的直流偏移。 跟踪使基带信号能够保持在基本上为零赫兹的中心频率,而在该频率下的信号强度在DC偏移滤波之前被最小化或被毛刺化。 否则可能通过滤波去除的信息因此被保留在相对较小失真的基带信号中。