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发明授权
CN1838525B 调制装置 有权

调制装置
摘要：
本发明提供一种用以调制基频信号的调制装置，包括分相器、低通滤波器与调制器。分相器根据方波输入信号以产生多个相位角分别为0°、30°、90°、120°、180°、210°、270°与300°的第一信号，低通滤波器用以滤除该等第一信号的高频信号以产生多个相位角分别为0°、30°、90°、120°、180°、210°、270°与300°的本地振荡信号，调制器则根据该等本地振荡信号调制该基频信号以消除该等本地振荡信号的第三阶谐波。另外，本发明亦提供一种用以调制基频信号的调制方法。
摘要（英）：

This invention provides a modulation device which is to modulate base frequency signal, which includes phase-splitter, low pass filter and adjustor. The phase-splitter produces a polarity of phase angles according to square wave signal, the phase angles are the first signals of 0degree,30degree,90degree, 120degree,180degree,210degree,270degreeand 300degreeseparately, the low pass filter is to filter the high frequency signal of the first signals to produce polarity of local oscillating signals whose phase angles are 0degree,30degree,90degree,120degree,180degree,210degree,270degreeand 300degreeseparately, the adjustor adjusts the base frequency signal according to the local oscillating signals to eliminate the third order harmonic of the local oscillating signal. Besides, this invention also provides an adjusting method for adjust base frequency signal.

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