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    • 2. 发明申请
    • A/D CONVERTER
    • A / D转换器
    • US20100013692A1
    • 2010-01-21
    • US12377989
    • 2007-08-10
    • Michiyo YamamotoKenji MurataMasakazu Shigemori
    • Michiyo YamamotoKenji MurataMasakazu Shigemori
    • H03M1/34
    • H03M1/1245H03M1/365
    • An external input operation clock signal is required for operating a conventional A/D converter, and the performance of the A/D converter is undesirably determined by the characteristics of the external input operation clock.A clock generator circuit (104) for automatically generating an operation clock is provided inside an A/D converter (100) to make the A/D converter require no external input operation clock. Further, a circuit for detecting the operation times of the constituents of the A/D converter is provided to generate a clock with which the A/D converter is optimally operated, thereby realizing high-speed operation and low power consumption.
    • 操作常规A / D转换器需要外部输入操作时钟信号,并且A / D转换器的性能不合需要地由外部输入操作时钟的特性决定。 在A / D转换器(100)内部设置用于自动生成操作时钟的时钟发生器电路(104),使得A / D转换器不需要外部输入操作时钟。 此外,提供用于检测A / D转换器的组成部分的操作时间的电路,以产生A / D转换器被最佳操作的时钟,从而实现高速操作和低功耗。
    • 3. 发明申请
    • A/D CONVERTER
    • A / D转换器
    • US20100007541A1
    • 2010-01-14
    • US12439444
    • 2007-08-10
    • Masakazu ShigemoriKoji SushiharaKenji Murata
    • Masakazu ShigemoriKoji SushiharaKenji Murata
    • H03M1/34
    • H03M1/0624H03M1/206H03M1/365
    • The conventional A/D converter has a drawback that the conversion precision is degraded when the operation periods of the constituents of the A/D converter are shortened due to the duty ratio of an external input clock because the operation periods of the constituents of the A/D converter depend on the pulse width of the external input clock. However, a highly-precise A/D conversion operation independent of the duty ratio of the external input clock can be realized by providing a circuit for detecting the operation periods of the constituents of the A/D converter, and adjusting the duty ratio of the operation clock according to the detected operation periods of the constituents of the A/D converter.
    • 传统的A / D转换器具有这样的缺点,即当A / D转换器的构成要素的操作周期由于外部输入时钟的占空比而缩短时,转换精度降低,因为A / D转换器取决于外部输入时钟的脉冲宽度。 然而,与外部输入时钟的占空比无关的高精度A / D转换操作可以通过提供用于检测A / D转换器的构成要素的操作周期的电路来实现,并且调整占空比 根据检测到的A / D转换器的构成要素的运行时间来设定运转时钟。
    • 4. 发明授权
    • Comparator and analog-to-digital converter
    • 比较器和模数转换器
    • US08487802B2
    • 2013-07-16
    • US13052817
    • 2011-03-21
    • Junichi NakaMasakazu Shigemori
    • Junichi NakaMasakazu Shigemori
    • H03M1/34
    • H03K5/249
    • Increase of power consumption is reduced, and the operational speed is improved. A comparator includes a comparing section which outputs a result of comparison between a first voltage and a second voltage which constitute an input differential signal, a first positive feedback section which operates in synchronism with a first clock signal, amplifies the result from the comparing section, and outputs the amplified result to an output node pair, and a second positive feedback section which operates in synchronism with a second clock signal, and provides positive feedback to the output node pair.
    • 降低功耗增加,运行速度提高。 比较器包括比较部分,其输出构成输入差分信号的第一电压和第二电压之间的比较结果,与第一时钟信号同步操作的第一正反馈部分,放大比较部分的结果, 并将放大的结果输出到输出节点对,以及与第二时钟信号同步工作的第二正反馈部分,并向输出节点对提供正反馈。
    • 5. 发明授权
    • A/D converter
    • A / D转换器
    • US07986256B2
    • 2011-07-26
    • US12377989
    • 2007-08-10
    • Michiyo YamamotoKenji MurataMasakazu Shigemori
    • Michiyo YamamotoKenji MurataMasakazu Shigemori
    • H03M1/12
    • H03M1/1245H03M1/365
    • An external input operation clock signal is required for operating a conventional A/D converter, and the performance of the A/D converter is undesirably determined by the characteristics of the external input operation clock. A clock generator circuit for automatically generating an operation clock is provided inside an A/D converter to make the A/D converter require no external input operation clock. Further, a circuit for detecting the operation times of the constituents of the A/D converter is provided to generate a clock with which the A/D converter is optimally operated, thereby realizing high-speed operation and low power consumption.
    • 操作常规A / D转换器需要外部输入操作时钟信号,并且A / D转换器的性能不合需要地由外部输入操作时钟的特性决定。 在A / D转换器内部设置用于自动生成工作时钟的时钟发生器电路,使A / D转换器不需要外部输入操作时钟。 此外,提供用于检测A / D转换器的组成部分的操作时间的电路,以产生A / D转换器被最佳操作的时钟,从而实现高速操作和低功耗。
    • 6. 发明授权
    • A/D converter
    • A / D转换器
    • US07834794B2
    • 2010-11-16
    • US12439444
    • 2007-08-10
    • Masakazu ShigemoriKoji SushiharaKenji Murata
    • Masakazu ShigemoriKoji SushiharaKenji Murata
    • H03M1/12
    • H03M1/0624H03M1/206H03M1/365
    • The conventional A/D converter has a drawback that the conversion precision is degraded when the operation periods of the constituents of the A/D converter are shortened due to the duty ratio of an external input clock because the operation periods of the constituents of the A/D converter depend on the pulse width of the external input clock. However, a highly-precise A/D conversion operation independent of the duty ratio of the external input clock can be realized by providing a circuit for detecting the operation periods of the constituents of the A/D converter, and adjusting the duty ratio of the operation clock according to the detected operation periods of the constituents of the A/D converter.
    • 传统的A / D转换器具有这样的缺点,即当A / D转换器的构成要素的操作周期由于外部输入时钟的占空比而缩短时,转换精度降低,因为A / D转换器取决于外部输入时钟的脉冲宽度。 然而,与外部输入时钟的占空比无关的高精度A / D转换操作可以通过提供用于检测A / D转换器的构成要素的操作周期的电路来实现,并且调整占空比 根据检测到的A / D转换器的构成要素的运行时间来设定运转时钟。