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    • 1. 发明授权
    • Polar receiver using injection-locking technique
    • 极地接收机采用注射锁定技术
    • US08498601B2
    • 2013-07-30
    • US13486157
    • 2012-06-01
    • Tzyy-Sheng HorngChi-Tsan ChenChieh-Hsun HsiaoKang-Chun Peng
    • Tzyy-Sheng HorngChi-Tsan ChenChieh-Hsun HsiaoKang-Chun Peng
    • H04B1/06H04B7/00
    • H03D5/00H04B1/0039
    • A polar receiver using injection-locking technique includes an antenna, a first filter, a first voltage-controlled oscillator, a first mixer, a frequency discriminator, a second filter, a third filter, a first analog-digital converter, a second analog-digital converter and a digital signal processing unit. Mentioned polar receiver enables to separate an envelope signal and a frequency-modulated signal from a radio frequency signal received from the antenna via the injection locking technique of the first voltage-controlled oscillator and the frequency discriminator. The envelope component and the frequency-modulated component can be digitally processed by the digital signal processing unit to accomplish polar demodulation.
    • 使用注入锁定技术的极地接收机包括天线,第一滤波器,第一压控振荡器,第一混频器,鉴频器,第二滤波器,第三滤波器,第一模数转换器,第二模拟数字转换器, 数字转换器和数字信号处理单元。 所提到的极地接收机使得能够通过第一压控振荡器和鉴频器的注入锁定技术从包含从天线接收的射频信号中分离包络信号和频率调制信号。 信号分量和调频分量可以由数字信号处理单元进行数字处理,以实现极性解调。
    • 3. 发明授权
    • Direct-conversion transmitter with resistance to local oscillator pulling effects
    • 具有本地振荡器拉动效果的直接转换发射器
    • US08306484B1
    • 2012-11-06
    • US13118510
    • 2011-05-30
    • Tzyy-Sheng HorngChieh-Hsun HsiaoKang-Chun Peng
    • Tzyy-Sheng HorngChieh-Hsun HsiaoKang-Chun Peng
    • H04B1/66
    • H04B1/0475
    • A direct-conversion transmitter with resistance to local oscillator pulling effect comprises a local oscillation circuit, a quadrature modulator connected with the local oscillation circuit, a power amplifier connected with the quadrature modulator, a first variable analog delay device connected with the power amplifier, a variable analog attenuator connected with the first variable analog delay device, an inner self-injection loop, and a power combiner connected with the variable analog attenuator and the inner self-injection loop. The local oscillation circuit comprises a two point voltage-controlled oscillator and a phase locked loop connected with the two point voltage-controlled oscillator. The inner self-injection loop comprises a second variable analog delay device, a phase shifter connected with the second variable analog delay device and a variable gain amplifier connected with the phase shifter. Signal distortion due to pulling effect in direct-conversion transmitter can be effectively suppressed by circuit design over the inner self-injection loop.
    • 具有本地振荡器拉动效应的直接转换发射机包括本地振荡电路,与本地振荡电路连接的正交调制器,与正交调制器连接的功率放大器,与功率放大器连接的第一可变模拟延迟器件, 与第一可变模拟延迟装置连接的可变模拟衰减器,内部自注入环路和与可变模拟衰减器和内部自注入环路连接的功率组合器。 本地振荡电路包括两点压控振荡器和与两点电压控制振荡器连接的锁相环。 内部自注入环路包括第二可变模拟延迟装置,与第二可变模拟延迟装置连接的移相器和与移相器连接的可变增益放大器。 通过内部自动注入回路的电路设计可以有效地抑制由于直接转换发射机中的拉动效应引起的信号失真。