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And method of frequency difference detection apparatus, a method and frequency discrimination apparatus, method, and frequency synthesizer
And method of frequency difference detection apparatus, a method and frequency discrimination apparatus, method, and frequency synthesizer
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机译：频率差检测装置及方法，方法及频率判别装置，方法及频率合成器
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摘要
Even if the present invention relates the input signal contains more noise, to obtain a frequency difference detection unit which can detect with high accuracy the frequency difference between the reference frequency and the predetermined frequency of the input signal. And A complex sine wave generator 3 that generates a complex sine wave, a multiplier circuit 4 for multiplying an input signal and the complex sine wave, a first integrating circuit for integrating the multiplication result of the multiplication circuit 4 in the time direction 5 Once, the first squaring circuit 6 for determining the square of the absolute value of the complex signal is the output signal of the first integrating circuit 5, a second squaring circuit 7 for obtaining the square of the absolute value of the instantaneous amplitude of the input signal, a second integrating circuit 8 integrates the calculation result of the second squaring circuit 7 in the time direction, the input based on the ratio of the output signal level of the output signal level of the first squaring circuit 6 and the second integrating circuit 8 I includes a frequency difference calculation circuit 9 for calculating the difference between the oscillation frequency of the signal frequency and the complex sine wave. [Selection Figure] Figure 1
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