Title: Modulator
Application Number: 200610075270 Application Date: 2006.04.18
Publication Number: 1838525 Publication Date: 2006.09.27
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03C1/02,H03C1/06
Applicant(s) Name: VIA Technologies, Inc. Address:
Inventor(s) Name: Zheng Nianzu, Liu Xianyou, Zeng Yingzhe
Attorney & Agent: huang xiaolin wang zhisen
Abstract:
     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.
Time: 15
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