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    • 4. 发明申请
    • Frequency Selective Logarithmic Amplifier With Intrinsic Frequency Demodulation Capability
    • 具有固有频率解调能力的频率选择对数放大器
    • US20140273898A1
    • 2014-09-18
    • US14213972
    • 2014-03-14
    • DockOn AG
    • Forrest BrownPatrick RadaAlexandre Dupuy
    • H04B1/16
    • H04W52/52G06G7/24H03D1/18H03D3/00H03D11/04H03D11/08H03D2200/006H04B1/26H04L7/033H04L27/14
    • A regenerative selective logarithmic detector amplifier (LDA) can have integrated FM demodulation capabilities. It can receive a wired or wireless FM modulated signal and amplify or demodulate it with high sensitivity, high skirt ratio and minimized noise when compared to the prior art. When used in conjunction with other circuits such as a PLL or mixer, it can improve interference rejection and frequency selectivity and be locked on a precise channel in frequency and phase. The LDA produces intermittent oscillations that are self-quenched when reaching a given threshold. It also embeds the circuitry to perform direct FM discrimination. FM demodulation process is completed by a simple analog or digital frequency to voltage converter. This plus the fact that the instantaneous regeneration gain is low-medium permit to detect signals of small amplitudes buried in the noise.
    • 再生选择对数检波放大器(LDA)可以集成FM解调功能。 与现有技术相比,它可以接收有线或无线FM调制信号,并以高灵敏度,高裙边比和最小化的噪声放大或解调它。 当与其他电路(如PLL或混频器)结合使用时,可以提高干扰抑制和频率选择性,并锁定在频率和相位上的精确信道上。 LDA产生间歇振荡,当达到给定的阈值时,它们会自我淬火。 它还嵌入电路以执行直接的FM鉴别。 FM解调过程由简单的模拟或数字频率到电压转换器完成。 这加上瞬时再生增益是低介质允许检测埋在噪声中的小幅度信号的事实。