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    • 7. 发明授权
    • Master frequency generator
    • 主频率发生器
    • US06295020B1
    • 2001-09-25
    • US09379645
    • 1999-08-23
    • Michael Koechlin
    • Michael Koechlin
    • G01S1300
    • H03B21/02
    • A system is provided for generating multiple frequencies in a specified frequency band, with a specified step size between frequencies, in which the spectral purity of the frequencies is assured. The switching speed between frequencies is very fast, limited only by the speed of the switches used. In one embodiment, only five tones are generated as the base for the rest of the synthesis, in which the relationship of the five tones is f0+/−⅛f0 and +/−{fraction (1/16)}f0. The subject system in one embodiment, utilizes a channel synthesizer and a doppler offset synthesizer which may be utilized in air defense systems for generating the transmit channels to be able to permit a missile seeker to transmit a signal at the appropriate frequency. In one embodiment, spectral purity is achieved by providing a number of stages of up converting, expanding, and dividing down of an input signal.
    • 提供一种用于在指定频带中产生多个频率的系统,其中频率之间具有指定的步长,其中确保频率的频谱纯度。 频率之间的切换速度非常快,仅受所用开关的速度的限制。 在一个实施例中,仅生成五个音调作为合成的其余部分的基础,其中五个音调的关系为f0 +/-⅛f0和+/- {分数(1/16)} f0。 在一个实施例中的主题系统利用信道合成器和多普勒偏移合成器,该合成器可用于防空系统中,用于产生发射信道以能够允许导弹探测器以适当频率发射信号。 在一个实施例中,通过提供输入信号的上转换,扩展和分频的多个级来实现频谱纯度。
    • 9. 发明授权
    • Double balanced mixer
    • 双平衡搅拌机
    • US08498604B2
    • 2013-07-30
    • US13134968
    • 2011-06-22
    • Xin JiangMichael Koechlin
    • Xin JiangMichael Koechlin
    • H04B1/26H03D7/14
    • H03D7/1441H03D7/1408H03D7/1458H03D2200/0013H03D2200/0023H03H7/42
    • An improved double balanced mixer is provided which in one embodiment includes a first balun for receiving a first single input and providing a first balanced output having two ports, a second balun for receiving a second single input and providing a second balanced output having two ports, and a balanced mixer core responsive to the first and second balanced outputs to provide a mixed signal from the first and second single inputs. The first balun includes an RC network coupled between at least one of the ports of the first balanced output and one of ground and a common mode node of the first balun to improve the linearity of the double balanced mixer.
    • 提供了一种改进的双平衡混频器,其在一个实施例中包括用于接收第一单个输入并提供具有两个端口的第一平衡输出的第一平衡 - 不平衡变换器,用于接收第二单个输入并提供具有两个端口的第二平衡输出的第二平衡 - 以及响应于第一和第二平衡输出的平衡混频器核心,以提供来自第一和第二单个输入的混合信号。 第一平衡 - 不平衡变压器包括耦合在第一平衡输出的至少一个端口和地之一的第一平衡 - 不平衡变换器的共模模式节点之间的RC网络,以改善双平衡混频器的线性度。