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    • 51. 发明授权
    • Analog-to-digital converter
    • 模数转换器
    • US08674861B2
    • 2014-03-18
    • US13681913
    • 2012-11-20
    • Junya MatsunoTetsuro Itakura
    • Junya MatsunoTetsuro Itakura
    • H03M1/06H03M1/10
    • H03M1/0607H03M1/1023H03M1/12
    • An embodied ADC includes a sampling unit sampling differential input signal to output differential sampled signal which has first and second sampled signals. The ADC includes a reference signal generator generating first and second reference signals and a preamplifier amplifying the differential sampled signal to output a differential amplification signal having first and second amplified outputs. The preamplifier has a first differential amplifier amplifying the first sampled signal using the first reference signal and a second differential amplifier amplifying the second sampled signal using the second reference signal. The ADC includes a comparator comparing the first and second amplified outputs and a correction controller controlling common-mode voltage levels of the first and second reference signals or common-mode voltage levels of the first and second sampled signals in accordance with the operations of the first and second differential amplifiers.
    • 实施的ADC包括采样单元采样差分输入信号以输出具有第一和第二采样信号的差分采样信号。 ADC包括产生第一和第二参考信号的参考信号发生器和放大差分采样信号的前置放大器以输出具有第一和第二放大输出的差分放大信号。 前置放大器具有使用第一参考信号放大第一采样信号的第一差分放大器和使用第二参考信号放大第二采样信号的第二差分放大器。 ADC包括比较第一和第二放大输出的比较器和校正控制器,其根据第一和第二放大输出的操作控制第一和第二参考信号的共模电压电平或第一和第二采样信号的共模电压电平 和第二差分放大器。
    • 53. 发明授权
    • Comparing circuit and parallel analog-to-digital converter
    • 比较电路和并行模数转换器
    • US08390498B2
    • 2013-03-05
    • US13207121
    • 2011-08-10
    • Tomohiko ItoTetsuro Itakura
    • Tomohiko ItoTetsuro Itakura
    • H03M1/12
    • H03M1/1023H03K5/2481H03M1/365
    • First and second resistor series divide a predetermined voltage range to generate first reference voltages and second reference voltages, respectively. First and second switch controlling circuits select respective ones of the first reference voltages and the second reference voltages. A comparing unit generates a logical signal representing a logical value by comparing a combined transistor current based on the selected first and second reference voltages with a transistor current based on an input signal. The first switch controlling circuit specifies two adjacent first reference voltages where the logical value is inverted by sequentially selecting the first reference voltages, and determines to select one of the adjacent reference voltages. Te second switch controlling circuit specifies two adjacent second reference voltages where the logical value is inverted by sequentially selecting the second reference voltages, and determines to select one of the adjacent reference voltages.
    • 第一和第二电阻器串分割预定电压范围以分别产生第一参考电压和第二参考电压。 第一和第二开关控制电路选择第一参考电压和第二参考电压中的相应的一个。 比较单元通过基于所选择的第一和第二参考电压与基于输入信号的晶体管电流比较组合的晶体管电流来产生表示逻辑值的逻辑信号。 第一开关控制电路通过顺序选择第一参考电压来指定逻辑值反相的两个相邻的第一参考电压,并且确定选择相邻参考电压之一。 Te第二开关控制电路指定两个相邻的第二参考电压,其中逻辑值通过顺序选择第二参考电压而被反相,并且确定选择相邻参考电压之一。
    • 59. 发明授权
    • Calibration method, A/D converter, and radio device
    • 校准方法,A / D转换器和无线电设备
    • US07940200B2
    • 2011-05-10
    • US12637211
    • 2009-12-14
    • Tomohiko ItoTetsuro Itakura
    • Tomohiko ItoTetsuro Itakura
    • H03M1/10
    • H03M1/1023H03M1/0682H03M1/205H03M1/365H03M1/745
    • There is disclosed a calibration method for an A/D converter. The A/D converter includes a first amplifier to amplify first and second voltage signals, a second amplifier to amplify the first and second voltage signals amplified by the first amplifier, and a comparator to compare the first and second voltage signals amplified by the second amplifier. The calibration method performs short-circuiting input ports of the second amplifier, comparing the first and second voltage signals inputted to the comparator to obtain a first result, calibrating output voltage of the second amplifier according to the first result, short-circuiting input ports of the first amplifier, opening the short-circuited input ports of the second amplifier, comparing the first and second voltage signals inputted to the comparator to obtain a second result, and calibrating output voltage of the first amplifier according to the second result.
    • 公开了一种用于A / D转换器的校准方法。 A / D转换器包括:放大第一和第二电压信号的第一放大器;放大由第一放大器放大的第一和第二电压信号的第二放大器;以及比较器,用于比较由第二放大器放大的第一和第二电压信号; 。 校准方法执行第二放大器的短路输入端口,比较输入到比较器的第一和第二电压信号以获得第一结果,根据第一结果校准第二放大器的输出电压,短路输入端口 第一放大器,打开第二放大器的短路输入端口,比较输入到比较器的第一和第二电压信号以获得第二结果,并根据第二结果校准第一放大器的输出电压。