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    • 1. 发明授权
    • Radio frequency duplex filter for removing transmit signals from a receive path
    • 用于从接收路径去除发送信号的射频双工滤波器
    • US08005448B1
    • 2011-08-23
    • US11747032
    • 2007-05-10
    • Kelvin Kai Tuan YanDong-Jun Yang
    • Kelvin Kai Tuan YanDong-Jun Yang
    • H04B17/00
    • H03H7/465H03H7/0153
    • The present invention is an RF duplex filter that is used to remove transmit signals from the receive path of a full duplex transceiver. The RF duplex filter includes a notch filter for blocking signals at a transmit frequency and a bandpass filter for enhancing signals at a receive frequency. The notch filter is formed with series resonant elements and the bandpass filter is formed with parallel resonant elements. One embodiment of the present invention may include tunable resonant elements for tuning the notch filter to a transmit frequency, tuning the bandpass filter to a receive frequency, or both. Calibration circuitry may be included in the full duplex receiver for adjusting the tunable resonant elements. The present invention includes a method for calibrating the tunable resonant elements.
    • 本发明是用于从全双工收发器的接收路径去除发送信号的RF双工滤波器。 RF双工滤波器包括用于阻挡发射频率信号的陷波滤波器和用于增强接收频率处的信号的带通滤波器。 陷波滤波器由串联谐振元件形成,带通滤波器形成有并联谐振元件。 本发明的一个实施例可以包括用于将陷波滤波器调谐到发射频率的可调谐谐振元件,将带通滤波器调谐到接收频率,或者两者。 校准电路可以包括在全双工接收器中用于调节可调谐谐振元件。 本发明包括校准可调谐谐振元件的方法。
    • 2. 发明授权
    • Apparatus for preventing liquid refrigerant accumulation of air conditioner and method thereof
    • 用于防止空调的液体制冷剂积聚的装置及其方法
    • US07584624B2
    • 2009-09-08
    • US10929457
    • 2004-08-31
    • Il Nahm HwangYoung Min ParkYoon Been LeeDong Jun YangSeok Ho YoonJong Han ParkSung Oh ChoiSung Chun Kim
    • Il Nahm HwangYoung Min ParkYoon Been LeeDong Jun YangSeok Ho YoonJong Han ParkSung Oh ChoiSung Chun Kim
    • F25B31/00F25B43/02F25B1/10F04B17/00
    • F25B31/004F25B13/00F25B2313/001F25B2400/075F25B2400/19F25B2500/27F25B2600/021F25B2600/2519F25B2700/2106F25B2700/21152Y02B30/741
    • Disclosed is an apparatus and method for preventing liquid refrigerant accumulation in an accumulator of an outdoor unit of an air conditioner. The method includes the steps of: determining a state of a compressor; if the compressor is in standby mode or off state, turning on a four-way valve; determining whether the state of the compressor in standby mode or off state continues longer than a predetermined amount of time; and if the state of the compressor continues longer than the predetermined amount of time, closing an expansion valve. Particularly, high-pressure refrigerant flows in the closed expansion valve while low-pressure refrigerant flows in a check valve through the four-way valve. The apparatus includes a suction pipe connected to spray oil of the accumulator to the compressor; a liquid recovery pipe with one end being connected to the suction pipe and the other end being connected to the accumulator; and a liquid recovery valve for controlling opening/closing of the liquid recovery pipe, in which a compressor of the air conditioner in cooling or heating mode is operated and a liquid recovery valve for controlling a liquid recovery pipe connected to the compressor and an accumulator is opened to reduce oil in the accumulator. According to the present invention, when the compressor is off, it is possible to prevent liquid refrigerant accumulation by changing refrigerant flow line to the accumulator and the refrigerant at the lower end of the accumulator can be recovered.
    • 公开了一种用于防止液体制冷剂积聚在空调的室外机的蓄能器中的装置和方法。 该方法包括以下步骤:确定压缩机的状态; 如果压缩机处于待机模式或关闭状态,打开四通阀; 确定压缩机的状态是否处于待机模式或关闭状态持续时间超过预定时间量; 并且如果压缩机的状态继续长于预定时间量,则关闭膨胀阀。 特别地,高压制冷剂在闭合膨胀阀中流动,而低压制冷剂通过四通阀在止回阀中流动。 该设备包括一个连接到压缩机上的蓄能器喷油的抽吸管; 液体回收管,其一端连接到吸入管,另一端连接到蓄能器; 以及用于控制液体回收管的打开/关闭的液体回收阀,其中操作冷却或加热模式的空调的压缩机和用于控制连接到压缩机和蓄液器的液体回收管的液体回收阀 打开以减少蓄能器中的油。 根据本发明,当压缩机关闭时,可以通过改变制冷剂流向蓄能器的流线来防止液体制冷剂的积聚,并且能够回收蓄能器的下端的制冷剂​​。
    • 10. 发明授权
    • High speed phase locked loop
    • 高速锁相环
    • US06940322B2
    • 2005-09-06
    • US10459910
    • 2003-06-12
    • Dong-Jun YangKenneth O
    • Dong-Jun YangKenneth O
    • H03K3/354H03K23/66H03L7/193H03L7/06
    • H03L7/193H03K3/354H03K23/667
    • A high speed CMOS phase locked loop (PLL) (10) includes a three-state phase detection circuit having a frequency phase detector (12) coupled to a charge pump (14) for monitoring the phase differences between a reference frequency signal and a divided output frequency signal. The PLL can further include a loop filter (16)coupled to the three-state phase detection circuit, a VCO (18) coupled to the output of the loop filter, a VCO buffer (22) coupled to the output of the VCO for providing an output frequency signal, and a dual modulus prescaler (28) having a synchronous counter (27 and 29) using feedback among D flip-flops (30 and 32) for generating the divided output frequency signal.
    • 高速CMOS锁相环(PLL)(10)包括具有耦合到电荷泵(14)的频率相位检测器(12)的三态相位检测电路,用于监视参考频率信号和分频信号之间的相位差 输出频率信号。 PLL还可以包括耦合到三态相位检测电路的环路滤波器(16),耦合到环路滤波器的输出的VCO(18),耦合到VCO的输出的VCO缓冲器(22),用于提供 输出频率信号和双模预分频器(28),其具有使用D触发器(30和32)之间的反馈产生分频输出频率信号的同步计数器(27和29)。