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    • 1. 发明公开
    • 2 포인트 FSK 변조를 사용하는 주파수 합성기 및 이를 위한 셀프-교정 방법
    • 使用两点FSK调制的频率合成器的自校准方法
    • KR1020100038139A
    • 2010-04-13
    • KR1020090089366
    • 2009-09-22
    • 더 스와치 그룹 리서치 앤 디벨롭먼트 엘티디
    • 카사그랑데,아노드
    • H03D3/24
    • H03C3/0925H03C3/0933H03C3/0941H03C3/0958H03C3/0991
    • PURPOSE: A frequency synthesizer using two point FSK(Frequency Shift Keying) modulation and self-correcting method thereof controls the state transition delay by the distortion of being created among the high frequency status transition of transmitted data or the low frequency loop. CONSTITUTION: A frequency synthesizer comprises the first phase-locked loop and ultra-high frequency access mechanism. The ultra-high frequency access mechanism comprises the digital-analog converter(20). The first phase-locked loop comprises the reference oscillator(2), the phase comparator, the first charge pump, the first loop filter, the voltage controlled oscillator(10). The frequency synthesizer comprises the second charge pump(14) and the second loop filter. The voltage comparator(21) compares the output voltage of the digital-analog converter with the voltage saved in the second loop filter.
    • 目的:使用两点FSK(频移键控)调制及其自校正方法的频率合成器通过在发送数据或低频环路的高频状态转换中产生的失真来控制状态转换延迟。 构成:频率合成器包括第一个锁相环和超高频接入机制。 超高频接入机构包括数模转换器(20)。 第一锁相环包括基准振荡器(2),相位比较器,第一电荷泵,第一环路滤波器,压控振荡器(10)。 频率合成器包括第二电荷泵(14)和第二环路滤波器。 电压比较器(21)将数模转换器的输出电压与保存在第二环路滤波器中的电压进行比较。