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    • 8. 发明授权
    • Sigma delta modulator, fractional frequency synthesizer and sigma delta modulating method
    • Sigma delta调制器,分数频率合成器和Σ-Δ调制方法
    • US07602252B2
    • 2009-10-13
    • US11851396
    • 2007-09-07
    • Hidenori Sakai
    • Hidenori Sakai
    • H03L7/195H03M3/02
    • H03M7/3022H03L7/1976H03M7/3042
    • There is provided a sigma delta modulator that outputs an output signal obtained by performing sigma delta modulation on an input signal, including: a plurality of accumulators that are serially connected; and an output signal generating section that generates the output signal on the basis of comparison result signals respectively output from the accumulators, in which each of the accumulators integrates values of signals being input and when an integration value is not less than a reference value, outputs the comparison result signal with a predetermined value and subtracts the value of the comparison result signal from the integration value, the value of the input signal is input into a first-stage accumulator, the integration value of the preceding-stage accumulator is input into the other accumulator, and at least one of the accumulators includes a low-pass filter that removes a predetermined high-frequency component in a waveform of the integration value.
    • 提供了一种Σ-Δ调制器,其输出通过对输入信号执行Σ-Δ调制而获得的输出信号,包括:串联连接的多个累加器; 以及输出信号生成部,其基于分别从累加器输出的比较结果信号生成输出信号,其中每个累加器对正在输入的信号的值进行积分,并且当积分值不小于参考值时,输出 比较结果信号具有预定值,并从积分值中减去比较结果信号的值,将输入信号的值输入到第一级累加器中,将前级累加器的积分值输入到 另一个累加器,并且所述累加器中的至少一个包括低通滤波器,其去除所述积分值的波形中的预定高频分量。
    • 9. 发明授权
    • Switching circuit and test apparatus
    • 开关电路和测试装置
    • US08779631B2
    • 2014-07-15
    • US13153466
    • 2011-06-05
    • Hidenori Sakai
    • Hidenori Sakai
    • H03K17/78G01R31/28G01R15/08
    • G01R15/08G01R31/28H03K17/78Y10T307/76
    • Provided is a switching circuit with high withstand voltage. The switching circuit switches whether two terminals are electrically connected to each other, according to a switching signal input thereto. The switching circuit comprises a first switching section that switches whether the two terminals are electrically connected to each other; a first control section that is electrically insulated from the first switching section and controls the first switching section according to an input current; a second switching section that switches whether the input current is input to the first control section; and a second control section that is electrically insulated from the second switching section and controls the second switching section according to the switching signal.
    • 提供具有高耐压的开关电路。 开关电路根据输入的开关信号,切换两端子是否电连接。 开关电路包括:第一开关部分,用于切换两个端子是否彼此电连接; 第一控制部,其与所述第一开关部电绝缘,并根据输入电流控制所述第一开关部; 第二切换部,切换输入电流是否输入到第一控制部; 以及第二控制部,其与所述第二开关部电绝缘,并根据所述开关信号控制所述第二开关部。