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公开(公告)号：US09912898B2
公开(公告)日：2018-03-06
申请号：US15256513
申请日：2016-09-03
CPC分类号： H04N5/378
摘要： According to an embodiment, an amplifier which amplifies a first signal to output a second signal includes the following elements. The comparator compares the first signal with a third signal to output a fourth signal. The delay circuit delays a fifth signal by a delay time to generate a sixth signal. The first capacitor is connected between a voltage source and a first node that provides the third signal. The second capacitor is connected between the first node and a second node that provides the second signal. The first switch is connected between the second node and a constant current source, and is controlled by the fourth signal and the fifth signal. The second switch is connected between the first node and the second node, and is controlled by the fifth signal and the sixth signal.
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公开(公告)号：US09213346B2
公开(公告)日：2015-12-15
申请号：US13737429
申请日：2013-01-09
发明人： Kei Shiraishi , Takeshi Ueno , Taichi Ogawa , Tetsuro Itakura
CPC分类号： G05F1/46 , H02M3/1584 , H02M2003/1586
摘要： There is provided a multiphase switching power supply circuit in which an input terminal receives an input voltage, an output terminal outputs an output voltage, first to an Nth power stages each include an inductor having one end connected to the output terminal; a high-side switch that connects another end of the inductor to the input terminal; and a low-side switch that connects the other end of the inductor to a reference voltage, a switch signal controller supplies first to an Nth control signals to the first to Nth power stages, the first to Nth control signals complementarily turning on and off their corresponding high-side switches and low-side switches at a frequency fs, and a switch signal controller determines phases of the first to Nth control signals according to a ration between inductance values of the inductors included in the first to Nth power stages.
摘要翻译： 提供一种多相开关电源电路，其中输入端接收输入电压，输出端输出输出电压，第一至第N功率级各自包括一端连接到输出端的电感; 将电感器的另一端连接到输入端子的高侧开关; 以及将电感器的另一端连接到参考电压的低侧开关，开关信号控制器向第一至第N功率级提供第一至第N控制信号，第一至第N控制信号互补地打开和关闭它们 频率为fs的相应的高侧开关和低侧开关，并且开关信号控制器根据包括在第一至第N功率级中的电感器的电感值之间的比例来确定第一至第N控制信号的相位。
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公开(公告)号：US09160359B2
公开(公告)日：2015-10-13
申请号：US14548886
申请日：2014-11-20
发明人： Kei Shiraishi , Junya Matsuno , Masanori Furuta , Tetsuro Itakura
CPC分类号： H03M1/20 , H03M1/0695 , H03M1/1245 , H03M1/164 , H03M1/18 , H03M1/36 , H03M1/466 , H03M1/56 , H03M3/46
摘要： According to an embodiment, an analog-to-digital (AD) converter includes a first AD conversion unit, a selector and a second AD conversion unit. The first AD conversion unit performs AD conversion of an analog signal in a first period to generate an upper-bit digital signal. The selector selects not less than one reference voltage based on the upper-bit digital signal to obtain a selected reference voltage group in a voltage range narrower than a full scale. The second AD conversion unit performs AD conversion of the analog signal by using the selected reference voltage group. The first period starts before settling of the analog signal up to an accuracy corresponding to a total resolution of the first AD conversion unit and the second AD conversion unit.
摘要翻译： 根据实施例，模数（AD）转换器包括第一AD转换单元，选择器和第二AD转换单元。 第一AD转换单元在第一周期中执行模拟信号的AD转换，以产生高位数字信号。 选择器基于高位数字信号选择不少于一个参考电压，以在比满量程更窄的电压范围内获得所选参考电压组。 第二AD转换单元通过使用所选择的参考电压组来执行模拟信号的AD转换。 第一时段在模拟信号稳定之前开始，直到对应于第一AD转换单元和第二AD转换单元的总分辨率的精度。
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公开(公告)号：US09118340B2
公开(公告)日：2015-08-25
申请号：US14548523
申请日：2014-11-20
发明人： Kei Shiraishi , Junya Matsuno , Masanori Furuta , Tetsuro Itakura
摘要： According to an embodiment, an analog-to-digital converter includes a first AD (analog-to-digital) conversion circuit and a second AD conversion circuit. The first AD conversion circuit performs AD conversion of a first input signal to generate an upper-bit digital signal. The second AD conversion circuit performs AD conversion of a sampled signal to generate a lower-bit digital signal. The sampled signal is obtained by sampling a residual signal corresponding to a residue of the AD conversion in the first AD conversion circuit. A period during which the second AD conversion circuit performs AD conversion of the sampled signal overlaps a period during which a second input signal subsequent to the first input signal is settled.
摘要翻译： 根据实施例，模数转换器包括第一AD（模拟 - 数字）转换电路和第二AD转换电路。 第一AD转换电路执行第一输入信号的AD转换以产生高位数字信号。 第二AD转换电路执行采样信号的AD转换以产生低位数字信号。 通过对与第一AD转换电路中的AD转换的残差相对应的残差信号进行采样来获得取样信号。 第二AD转换电路执行采样信号的AD转换的周期与第一输入信号之后的第二输入信号结束的周期重叠。
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公开(公告)号：US09312873B2
公开(公告)日：2016-04-12
申请号：US14589138
申请日：2015-01-05
IPC分类号： H03M1/00 , H04N5/374 , H04N5/3745 , G04F10/00 , H03M1/34
CPC分类号： H03M1/002 , G04F10/005 , H03M1/14 , H03M1/34 , H03M1/56 , H04N5/3742 , H04N5/37455 , H04N5/378
摘要： An analog-to-digital converter has a sampler to hold a sampled signal, an input signal predictor to generate a prediction signal at predetermined timing before a signal level of a ramp signal that monotonically increases or monotonically decreases with time crosses a signal level of the sampled signal, a comparator to compare signal levels of the ramp signal and the sampled signal to output a comparison signal showing whether the signal level of the ramp signal is larger than the signal lever of the sampled signal, a first counter to perform a count operation in synchronism with a first clock signal within a period from start of a comparison operation by the comparator to generation of the prediction signal, and a second counter to perform a count operation in synchronism with a second clock signal.
摘要翻译： 模数转换器具有采样器以保持采样信号，输入信号预测器用于在斜率信号单调递增或随时间单调递减的信号电平之前的预定定时产生预测信号， 比较器，用于比较斜坡信号的信号电平和采样信号，以输出表示斜坡信号的信号电平是否大于采样信号的信号杆的比较信号;执行计数操作的第一计数器 与比较器从比较操作开始到预测信号的生成期间的第一时钟信号同步，以及与第二时钟信号同步地执行计数操作的第二计数器。
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公开(公告)号：US20150194973A1
公开(公告)日：2015-07-09
申请号：US14589138
申请日：2015-01-05
IPC分类号： H03M1/00 , H03M1/34 , G04F10/00 , H04N5/3745 , H04N5/374
CPC分类号： H03M1/002 , G04F10/005 , H03M1/14 , H03M1/34 , H03M1/56 , H04N5/3742 , H04N5/37455 , H04N5/378
摘要： An analog-to-digital converter has a sampler to hold a sampled signal, an input signal predictor to generate a prediction signal at predetermined timing before a signal level of a ramp signal that monotonically increases or monotonically decreases with time crosses a signal level of the sampled signal, a comparator to compare signal levels of the ramp signal and the sampled signal to output a comparison signal showing whether the signal level of the ramp signal is larger than the signal lever of the sampled signal, a first counter to perform a count operation in synchronism with a first clock signal within a period from start of a comparison operation by the comparator to generation of the prediction signal, and a second counter to perform a count operation in synchronism with a second clock signal.
摘要翻译： 模数转换器具有采样器以保持采样信号，输入信号预测器用于在斜率信号单调递增或随时间单调递减的信号电平之前的预定定时产生预测信号， 比较器，用于比较斜坡信号的信号电平和采样信号，以输出表示斜坡信号的信号电平是否大于采样信号的信号杆的比较信号;执行计数操作的第一计数器 与比较器从比较操作开始到预测信号的生成期间的第一时钟信号同步，以及与第二时钟信号同步地执行计数操作的第二计数器。
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公开(公告)号：US08994566B2
公开(公告)日：2015-03-31
申请号：US13765325
申请日：2013-02-12
发明人： Kei Shiraishi , Takeshi Ueno , Tetsuro Itakura
CPC分类号： H03M1/66 , H03M1/0845 , H03M1/742
摘要： There is provided A DA converter in which the N current switch cells each include: a current source having one end connected to a first power source; and first and second switch transistors differentially operating each other, each having a control terminal receiving a digital signal, the first combining node combines a current output from the first switch transistor in each current switch cell, the second combining node combines a current output from the second switch transistor in each current switch cell, the first output impedance element has ends connected to the first combining node and a second power source, the second output impedance element has ends connected to the second combining node and the second power source, the controller controls the current source in each current switch cell to reduce variation in amount of a current flowing from the first power source.
摘要翻译： 提供了A DA转换器，其中N个电流开关单元各自包括：电流源，其一端连接到第一电源; 第一和第二开关晶体管彼此差分地工作，每个具有接收数字信号的控制端，第一组合节点组合每个当前开关单元中的来自第一开关晶体管的电流输出，第二组合节点组合来自 在每个电流开关单元中的第二开关晶体管，第一输出阻抗元件具有连接到第一组合节点和第二电源的端部，第二输出阻抗元件具有连接到第二组合节点和第二电源的端部，控制器控制 每个电流开关单元中的电流源，以减少从第一电源流出的电流量的变化。
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8.发明授权公开(公告)号：US09240797B2
公开(公告)日：2016-01-19
申请号：US14657728
申请日：2015-03-13
发明人： Kei Shiraishi , Masanori Furuta , Junya Matsuno , Tetsuro Itakura
CPC分类号： H03M1/0836 , H03M1/001 , H03M1/08 , H03M1/0845 , H03M1/66 , H03M1/665 , H03M1/742
摘要： According to an embodiment, a power supply noise cancelling circuit includes a generator, a first multiplier, a subtractor and a digital-to-analog converter. The generator generates a sine wave signal. The first multiplier multiplies a digital input signal by a digital signal based on the sine wave signal to generate a first digital product signal. The subtractor subtracts a digital signal based on the first digital product signal from the digital input signal to generate a digital difference signal. The digital-to-analog converter performs a digital-to-analog conversion on the digital difference signal to obtain an analog output signal.
摘要翻译： 根据实施例，电源噪声消除电路包括发生器，第一乘法器，减法器和数模转换器。 发生器产生正弦波信号。 第一乘法器基于正弦波信号将数字输入信号乘以数字信号以产生第一数字乘积信号。 减法器基于来自数字输入信号的第一数字乘积信号减去数字信号，以产生数字差分信号。 数模转换器对数字差分信号执行数模转换以获得模拟输出信号。
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公开(公告)号：US20150138005A1
公开(公告)日：2015-05-21
申请号：US14548523
申请日：2014-11-20
发明人： Kei Shiraishi , Junya Matsuno , Masanori Furuta , Tetsuro Itakura
摘要： According to an embodiment, an analog-to-digital converter includes a first AD (analog-to-digital) conversion circuit and a second AD conversion circuit. The first AD conversion circuit performs AD conversion of a first input signal to generate an upper-bit digital signal. The second AD conversion circuit performs AD conversion of a sampled signal to generate a lower-bit digital signal. The sampled signal is obtained by sampling a residual signal corresponding to a residue of the AD conversion in the first AD conversion circuit. A period during which the second AD conversion circuit performs AD conversion of the sampled signal overlaps a period during which a second input signal subsequent to the first input signal is settled.
摘要翻译： 根据实施例，模数转换器包括第一AD（模拟 - 数字）转换电路和第二AD转换电路。 第一AD转换电路执行第一输入信号的AD转换以产生高位数字信号。 第二AD转换电路执行采样信号的AD转换以产生低位数字信号。 通过对与第一AD转换电路中的AD转换的残差相对应的残差信号进行采样来获得取样信号。 第二AD转换电路执行采样信号的AD转换的周期与第一输入信号之后的第二输入信号结束的周期重叠。
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