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    • 5. 发明授权
    • Wireless device with a non-compensated crystal oscillator
    • 带无补偿晶体振荡器的无线设备
    • US08014476B2
    • 2011-09-06
    • US11269360
    • 2005-11-07
    • Daniel F. FilipovicCharles J. PersicoChristopher C. Riddle
    • Daniel F. FilipovicCharles J. PersicoChristopher C. Riddle
    • H04L27/06
    • H04B1/38H03J7/10H03J2200/01H03J2200/10H04L27/2332H04L2027/0036H04L2027/0055H04L2027/0065H04L2027/0087
    • A wireless device achieves good performance using a crystal oscillator that is not compensated for temperature. The crystal oscillator provides a reference signal having a temperature dependent frequency error. A control unit estimates the frequency error (e.g., based on a received pilot) and provides a frequency error estimate. A clock generator generates a digital clock, which tracks chip timing, based on the reference signal and the frequency error estimate. A receiver frequency downconverts an input RF signal with a receive LO signal having the frequency error and provides an analog baseband signal. An ADC digitizes the analog baseband signal based on a sampling clock having the frequency error and provides ADC samples. A re-clocking circuit re-clocks the ADC samples based on a digital clock and provides data samples. A digital rotator frequency translates the data samples based on the frequency error estimate and provides frequency-translated samples centered near DC.
    • 无线设备使用不补偿温度的晶体振荡器实现良好的性能。 晶体振荡器提供具有温度相关频率误差的参考信号。 控制单元估计频率误差(例如,基于接收到的导频)并提供频率误差估计。 时钟发生器基于参考信号和频率误差估计器产生跟踪芯片定时的数字时钟。 接收机使用具有频率误差的接收LO信号对输入RF信号进行下变频并提供模拟基带信号。 ADC根据具有频率误差的采样时钟数字化模拟基带信号,并提供ADC采样。 重新计时电路根据数字时钟对ADC采样进行重新计时,并提供数据采样。 数字旋转器频率基于频率误差估计来转换数据样本,并提供以DC为中心的频率转换样本。
    • 6. 发明申请
    • DIGITAL ADJUSTMENT OF AN OSCILLATOR
    • 振荡器的数字调整
    • US20070296511A1
    • 2007-12-27
    • US11761668
    • 2007-06-12
    • Christophe HoluigueStephan Mechnig
    • Christophe HoluigueStephan Mechnig
    • H03L7/00
    • H03K17/6872H03B5/1212H03B5/1228H03B5/1265H03B5/1268H03B2200/005H03B2201/0266H03J5/244H03J2200/01H03K17/063H03K17/162H03L7/099H03L7/10
    • The invention concerns the adjustment of an oscillation frequency of an oscillator, in particular the digital coarse adjustment of a PLL oscillator by means of a circuit arrangement comprising at least one pair of capacitors (C, C′), of which first terminals are connected with the oscillator, and second terminals can selectively be connected by means of a switching arrangement with a first reference potential (vss), in order to incorporate the capacitor pair (C, C′) into an oscillating circuit of the oscillator, wherein the circuit arrangement comprises: first FETs (T1, T1′) for the respective connection of the second terminals with the first reference potential (vss), a second FET (T2) for the connection of the second terminals with each other, and third FETs (T3, T3′) for the respective connection of the second terminals with a second reference potential (vdd), which differs from the first reference potential (vss).
    • 本发明涉及振荡器的振荡频率的调整,特别是通过包括至少一对电容器(C,C')的电路装置对PLL振荡器的数字粗略调整,其中第一端子与 振荡器和第二端子可以通过具有第一参考电位(vss)的开关装置选择性地连接,以便将电容器对(C,C')并入振荡器的振荡电路中,其中电路装置 包括:用于第二端子与第一参考电位(vss)的相应连接的第一FET(T 1,T 1'),用于连接第二端子的第二FET(T 2)和第三FET (T 3,T 3'),用于与第一参考电位(vss)不同的具有第二参考电位(vdd)的第二端子的相应连接。
    • 7. 发明申请
    • Wireless device with a non-compensated crystal oscillator
    • 带无补偿晶体振荡器的无线设备
    • US20070104298A1
    • 2007-05-10
    • US11269360
    • 2005-11-07
    • Daniel FilipovicCharles PersicoChristopher Riddle
    • Daniel FilipovicCharles PersicoChristopher Riddle
    • H04L27/06
    • H04B1/38H03J7/10H03J2200/01H03J2200/10H04L27/2332H04L2027/0036H04L2027/0055H04L2027/0065H04L2027/0087
    • A wireless device achieves good performance using a crystal oscillator that is not compensated for temperature. The crystal oscillator provides a reference signal having a temperature dependent frequency error. A control unit estimates the frequency error (e.g., based on a received pilot) and provides a frequency error estimate. A clock generator generates a digital clock, which tracks chip timing, based on the reference signal and the frequency error estimate. A receiver frequency downconverts an input RF signal with a receive LO signal having the frequency error and provides an analog baseband signal. An ADC digitizes the analog baseband signal based on a sampling clock having the frequency error and provides ADC samples. A re-clocking circuit re-clocks the ADC samples based on a digital clock and provides data samples. A digital rotator frequency translates the data samples based on the frequency error estimate and provides frequency-translated samples centered near DC.
    • 无线设备使用不补偿温度的晶体振荡器实现良好的性能。 晶体振荡器提供具有温度相关频率误差的参考信号。 控制单元估计频率误差(例如,基于接收到的导频)并提供频率误差估计。 时钟发生器基于参考信号和频率误差估计器产生跟踪芯片定时的数字时钟。 接收机使用具有频率误差的接收LO信号对输入RF信号进行下变频并提供模拟基带信号。 ADC根据具有频率误差的采样时钟数字化模拟基带信号,并提供ADC采样。 重新计时电路根据数字时钟对ADC采样进行重新计时,并提供数据采样。 数字旋转器频率基于频率误差估计来转换数据样本,并提供以DC为中心的频率转换样本。
    • 9. 发明授权
    • Self-adaptive frequency band-pass filtering device in microwave signal transceiver
    • 微波信号收发器中的自适应频带滤波装置
    • US07082294B2
    • 2006-07-25
    • US10297974
    • 2001-06-12
    • Bernard DenisPhilippe Gilberton
    • Bernard DenisPhilippe Gilberton
    • H04B1/06H04B7/00
    • H03J5/244H03J2200/01
    • The present invention relates to a self-adaptive band-pass filtering device in a microwave signal transmitter and/or receiver, the receiver being connected to a microwave signal receiving antenna connected to the input of a low-noise amplifier, a mixer that receives, on the one hand, the output signal of the low-noise amplifier and, on the other hand, the signal from a frequency synthesizer, characterized in that the self-adaptive filtering device comprises, upstream of the amplifier, on the one hand, at least one filtering means having at least two different frequency bands and, on the other hand, means for selecting either a filtering means or one of the frequency bands depending on the frequency of the signal to be received.
    • 本发明涉及一种微波信号发射机和/或接收机中的自适应带通滤波装置,该接收机连接到连接到低噪声放大器的输入端的微波信号接收天线, 一方面是低噪声放大器的输出信号,另一方面来自频率合成器的信号,其特征在于,自适应滤波装置一方面包括放大器的上游,一方面在 至少一个具有至少两个不同频带的滤波装置,另一方面,用于根据待接收信号的频率来选择滤波装置或者一个频带的装置。