公开(公告)号：US08558527B2

公开(公告)日：2013-10-15

申请号：US13109331

申请日：2011-05-17

申请人： Masahiro Sasaki ,  Tetsuya Kawashima

发明人： Masahiro Sasaki ,  Tetsuya Kawashima

IPC分类号： G05F1/00

CPC分类号： H02M1/32 ,  H02M1/36 ,  H02M3/1588 ,  H02M2001/0012 ,  Y02B70/1466

摘要： A switching power supply system controlling switching operations of switching devices by a control circuit to convert an input voltage into a desired output voltage, the system being provided with a under voltage lock out circuit including: an input voltage detection unit detecting an input voltage and producing an input voltage digital signal corresponding to the input voltage Vin; and a voltage level comparison unit carrying out digital comparison of the input voltage digital signal with each of two voltage detection level data and outputting the results of the comparisons as an output signal, in which by changing voltage detection level data stored in two registers, desired voltage detection levels and hysteresis characteristic are easily actualized.

摘要翻译： 一种开关电源系统，其通过控制电路来控制开关器件的开关动作，将输入电压转换成期望的输出电压，所述系统配备有欠压锁定电路，包括：输入电压检测单元，检测输入电压并产生 对应于输入电压Vin的输入电压数字信号; 以及电压电平比较单元，对输入电压数字信号与两个电压检测电平数据中的每一个进行数字比较，并输出比较结果作为输出信号，其中通过改变存储在两个寄存器中的电压检测电平数据为期望的 电压检测电平和滞后特性容易实现。

公开(公告)号：US08441242B2

公开(公告)日：2013-05-14

申请号：US12794506

申请日：2010-06-04

申请人： Wai Tung Ng ,  Jing Wang ,  Kendy Ng ,  Haruhiko Nishio ,  Masahiro Sasaki ,  Tetsuya Kawashima

发明人： Wai Tung Ng ,  Jing Wang ,  Kendy Ng ,  Haruhiko Nishio ,  Masahiro Sasaki ,  Tetsuya Kawashima

IPC分类号： G05F1/00

CPC分类号： H02M3/1584 ,  H02M2001/009

摘要： A fully integrated DC-DC converter utilizes digitally controlled dual output stages to achieve fast load transient recovery is presented. The DC-DC converter includes a main converter output stage connected in parallel with an auxiliary output stage. The main output stage is responsible for steady-state operation and is designed to achieve high conversion efficiency using large inductor and power transistors with low on-resistance. The auxiliary stage is responsible for transient suppression and is only active when a load transient occurs. The auxiliary output stage performs well with inductor and power transistors much smaller than those of the main switching stage and thus achieves well balanced power conversion efficiency and dynamic performance with a much smaller area penalty than previously described dual-output-stage converters.

摘要翻译： 一个完全集成的DC-DC转换器采用数字控制双输出级来实现快速负载瞬态恢复。 DC-DC转换器包括与辅助输出级并联连接的主转换器输出级。 主输出级负责稳态运行，并设计为使用大电感和功率晶体管实现高转换效率，具有低导通电阻。 辅助级负责瞬态抑制，仅在发生负载瞬变时有效。 辅助输出级与主开关级的电感和功率晶体管相比表现良好，从而实现了良好平衡的功率转换效率和动态性能，具有比先前描述的双输出级转换器小得多的面积损失。

公开(公告)号：US08552702B2

公开(公告)日：2013-10-08

申请号：US13039481

申请日：2011-03-03

申请人： Masahiro Sasaki ,  Tetsuya Kawashima

发明人： Masahiro Sasaki ,  Tetsuya Kawashima

IPC分类号： G05F1/00

CPC分类号： G05F1/10

摘要： A digital control switching regulator of the invention ON/OFF-controls switching elements by digital-controlled pulse width modulation signals and converts an input voltage to a desired output voltage. The switching regulator includes an input voltage detection circuit that includes: a voltage dividing circuit outputting a divided voltage of the input voltage; a comparator section comparing the divided voltage of the input voltage with a first reference voltage and a second reference voltage and outputting a first comparison signal and a second comparison signal indicating comparison results; and a control section controlling a dividing ratio of the voltage dividing circuit based on the first comparison signal and the second comparison signal to obtain the predetermined divided voltage, thereby outputting an input voltage digital signal corresponding to the input voltage. The input voltage digital signal controls controller coefficients for use in the digital control.

摘要翻译： 本发明的数字控制开关调节器通过数字控制的脉冲宽度调制信号对开关元件进行ON / OFF控制，并将输入电压转换为期望的输出电压。 开关调节器包括：输入电压检测电路，包括：分压电路，输出输入电压的分压; 比较部分，将输入电压的分压与第一参考电压和第二参考电压进行比较，并输出第一比较信号和指示比较结果的第二比较信号; 以及控制部，其基于第一比较信号和第二比较信号来控制分压电路的分压比，以获得预定的分压，从而输出与输入电压对应的输入电压数字信号。 输入电压数字信号控制用于数字控制的控制器系数。

公开(公告)号：US20110068965A1

公开(公告)日：2011-03-24

申请号：US12881977

申请日：2010-09-14

申请人： Masahiro SASAKI ,  Tetsuya Kawashima

发明人： Masahiro SASAKI ,  Tetsuya Kawashima

IPC分类号： H03M1/12 ,  H03K7/08 ,  G05F3/02

CPC分类号： H02M3/157 ,  H03K5/133 ,  H03K7/08 ,  H03K2005/00032

摘要： A digital control switching power supply unit converts an input voltage into a desired output voltage using a digitally controlled pulse width modulation (PWM) signal according to a switching cycle. The power supply unit includes an analog-to-digital converter (ADC). The ADC converts a result of a comparison between an output voltage and a reference voltage to a digital signal during a conversion cycle. The ADC includes a circuit for outputting a phase difference between a switching cycle and the conversion cycle, and a delay circuit. The delay circuit generates a delay output current based on a result of the comparison and the phase difference and determines the conversion time delay according to the delay output current. The delay circuit also generates a delay reference current based on the reference voltage and the phase difference and determining the duration of the conversion cycle according to the delay reference current.

摘要翻译： 数字控制开关电源单元根据开关周期使用数字控制的脉宽调制（PWM）信号将输入电压转换成期望的输出电压。 电源单元包括模数转换器（ADC）。 在转换周期中，ADC将输出电压和参考电压之间的比较结果转换为数字信号。 ADC包括用于输出开关周期和转换周期之间的相位差的电路和延迟电路。 延迟电路根据比较结果和相位差产生延迟输出电流，并根据延迟输出电流确定转换时间延迟。 延迟电路还基于参考电压和相位差产生延迟参考电流，并根据延迟参考电流确定转换周期的持续时间。

公开(公告)号：US20100270989A1

公开(公告)日：2010-10-28

申请号：US12662695

申请日：2010-04-28

申请人： Masahiro Sasaki ,  Tetsuya Kawashima

发明人： Masahiro Sasaki ,  Tetsuya Kawashima

IPC分类号： G05F1/46

CPC分类号： H02M3/157 ,  H02M3/1588 ,  Y02B70/1466

摘要： A switching power supply that can suppress output variation at a time of transition of a control mode from a non-linear control mode to a linear control mode. The switching power supply includes instruction value forming circuitry that forms, in a linear control mode, a linear control instruction value for linearly control a switching circuit based on an error of an output voltage, and forms, in a non-linear control mode, a non-linear control instruction value for non-linearly control the switching circuit. The instruction value forming circuitry predicts, in the non-linear control mode, a linear control instruction value suited to the load current in the non-linear control mode, and uses the predicted linear control instruction value for an initial value of the linear control instruction value at a time of transition from the non-linear control mode to the linear control mode.

摘要翻译： 一种开关电源，其能够抑制在将控制模式从非线性控制模式转换到线性控制模式时的输出变化。 开关电源包括指令值形成电路，其以线性控制模式形成用于基于输出电压的误差线性控制开关电路的线性控制指令值，并且以非线性控制模式形成 非线性控制指令值用于非线性控制开关电路。 指令值形成电路在非线性控制模式中预测适合于非线性控制模式中的负载电流的线性控制指令值，并且将预测的线性控制指令值用于线性控制指令的初始值 从非线性控制模式转换到线性控制模式时的值。

公开(公告)号：US08847566B2

公开(公告)日：2014-09-30

申请号：US12662695

申请日：2010-04-28

申请人： Masahiro Sasaki ,  Tetsuya Kawashima

发明人： Masahiro Sasaki ,  Tetsuya Kawashima

IPC分类号： G05F1/00 ,  H02M3/158 ,  H02M3/157

CPC分类号： H02M3/157 ,  H02M3/1588 ,  Y02B70/1466

摘要： A switching power supply that can suppress output variation at a time of transition of a control mode from a non-linear control mode to a linear control mode. The switching power supply includes instruction value forming circuitry that forms, in a linear control mode, a linear control instruction value for linearly control a switching circuit based on an error of an output voltage, and forms, in a non-linear control mode, a non-linear control instruction value for non-linearly control the switching circuit. The instruction value forming circuitry predicts, in the non-linear control mode, a linear control instruction value suited to the load current in the non-linear control mode, and uses the predicted linear control instruction value for an initial value of the linear control instruction value at a time of transition from the non-linear control mode to the linear control mode.

摘要翻译： 一种开关电源，其能够抑制在将控制模式从非线性控制模式转换到线性控制模式时的输出变化。 开关电源包括指令值形成电路，其以线性控制模式形成用于基于输出电压的误差线性控制开关电路的线性控制指令值，并且以非线性控制模式形成 非线性控制指令值用于非线性控制开关电路。 指令值形成电路在非线性控制模式中预测适合于非线性控制模式中的负载电流的线性控制指令值，并且将预测的线性控制指令值用于线性控制指令的初始值 从非线性控制模式转换到线性控制模式时的值。

公开(公告)号：US08421430B2

公开(公告)日：2013-04-16

申请号：US12962391

申请日：2010-12-07

申请人： Masahiro Sasaki ,  Tetsuya Kawashima

发明人： Masahiro Sasaki ,  Tetsuya Kawashima

IPC分类号： G05F1/00

CPC分类号： H02M3/157

摘要： A digital control switching power supply unit includes an A/D converter circuit having a delay line circuit that has a delay element array whose delay time is controlled by a bias current, and that converts a current value into a digital signal using a signal transmission delay time, a phase difference detector circuit that detects a phase difference between a switching cycle and an A/D conversion cycle, a charge pump circuit that generates a control voltage in accordance with the phase difference, and a bias current indicator circuit that determines a bias current in accordance with an output voltage of the charge pump circuit and a result of a comparison of a detected value of the output voltage and a reference voltage, wherein the digital control switching power supply unit controls in such a way that the A/D conversion cycle is synchronized with the switching cycle.

摘要翻译： 数字控制开关电源单元包括具有延迟线电路的A / D转换器电路，延迟线电路具有延迟元件阵列，其延迟时间由偏置电流控制，并且使用信号传输延迟将电流值转换为数字信号 时间，检测开关周期和A / D转换周期之间的相位差的相位差检测器电路，产生根据相位差的控制电压的电荷泵电路和确定偏置的偏置电流指示器电路 电流根据电荷泵电路的输出电压和输出电压的检测值与参考电压的比较的结果，其中数字控制开关电源单元以这样的方式进行控制，使得A / D转换 周期与开关周期同步。

公开(公告)号：US08164318B2

公开(公告)日：2012-04-24

申请号：US12881977

申请日：2010-09-14

申请人： Masahiro Sasaki ,  Tetsuya Kawashima

发明人： Masahiro Sasaki ,  Tetsuya Kawashima

IPC分类号： G05F1/40

CPC分类号： H02M3/157 ,  H03K5/133 ,  H03K7/08 ,  H03K2005/00032

摘要： A digital control switching power supply unit converts an input voltage into a desired output voltage using a digitally controlled pulse width modulation (PWM) signal according to a switching cycle. The power supply unit includes an analog-to-digital converter (ADC). The ADC converts a result of a comparison between an output voltage and a reference voltage to a digital signal during a conversion cycle. The ADC includes a circuit for outputting a phase difference between a switching cycle and the conversion cycle, and a delay circuit. The delay circuit generates a delay output current based on a result of the comparison and the phase difference and determines the conversion time delay according to the delay output current. The delay circuit also generates a delay reference current based on the reference voltage and the phase difference and determining the duration of the conversion cycle according to the delay reference current.

摘要翻译： 数字控制开关电源单元根据开关周期使用数字控制的脉宽调制（PWM）信号将输入电压转换成期望的输出电压。 电源单元包括模数转换器（ADC）。 在转换周期中，ADC将输出电压和参考电压之间的比较结果转换为数字信号。 ADC包括用于输出开关周期和转换周期之间的相位差的电路和延迟电路。 延迟电路根据比较结果和相位差产生延迟输出电流，并根据延迟输出电流确定转换时间延迟。 延迟电路还基于参考电压和相位差产生延迟参考电流，并根据延迟参考电流确定转换周期的持续时间。

公开(公告)号：US08692531B2

公开(公告)日：2014-04-08

申请号：US13360987

申请日：2012-01-30

申请人： Tetsuya Kawashima

发明人： Tetsuya Kawashima

IPC分类号： G05F1/00

CPC分类号： H02M3/157 ,  H02M2001/0025

摘要： A switching regulator can convert an input voltage to a desired output voltage by ON-OFF controlling switching elements with PWM signals. The switching regulator can include a communication interface circuit that receives external operation instructions, an output voltage setting section that changes an output voltage to an output voltage setting value upon receiving an output voltage changing instruction from the outside, a voltage divider and an ADC that converts an error voltage into a digital error signal e[n], the error voltage being a difference between a reference voltage Vref and a detected output voltage value Vfb. The switching regulator can also include a controller that includes an operation control section for calculating a duty factor signal d[n] to determine an ON time proportion of the switching elements and an output voltage changing control section for controlling operation to change the output voltage.

摘要翻译： 开关调节器可以通过ON-OFF将输入电压转换为期望的输出电压，从而控制具有PWM信号的开关元件。 开关调节器可以包括接收外部操作指令的通信接口电路，输出电压设定部，其在从外部接收到输出电压变化指令时，将输出电压变更为输出电压设定值，分压器和ADC 将误差电压转换为数字误差信号e [n]，误差电压是参考电压Vref与检测的输出电压值Vfb之差。 开关调节器还可以包括控制器，其包括用于计算占空因数信号d [n]以确定开关元件的接通时间比例的操作控制部分和用于控制改变输出电压的操作的输出电压变化控制部分。

公开(公告)号：US08445669B2

公开(公告)日：2013-05-21

申请号：US12936789

申请日：2009-04-10

申请人： Tatsunori Sato ,  Tetsuya Kawashima ,  Toshio Miwa ,  Kazutoyo Dokei ,  Chikoto Fujimoto

发明人： Tatsunori Sato ,  Tetsuya Kawashima ,  Toshio Miwa ,  Kazutoyo Dokei ,  Chikoto Fujimoto

IPC分类号： C07H19/167

CPC分类号： C07H19/067 ,  C07D405/04 ,  C07H19/06 ,  Y02P20/55

摘要： The present invention provides a process for producing 2′,3′-didehydro-3′-deoxy-4′-ethynylthymidine, which is useful as a medicine, in an efficient and industrially advantageous manner, and more specifically, provides a process for producing 2′,3′-didehydro-3′-deoxy-4′-ethynylthymidine as shown below. (wherein R1 and R2 independently represent a protective group for a hydroxy group, or R1 and R2 together form a protective group for two hydroxy groups, R3 and R4 independently represent a protective group for a hydroxy group, R5 represents a protective group for a hydroxy group, R6 represents a protective group for a hydroxy group, X represents a leaving group, and Y represents a halogen atom.)

摘要翻译： 本发明提供以有效和工业上有利的方式制备可用作药物的2'，3'-二脱氢-3'-脱氧-4'-乙炔基胸苷的方法，更具体地说，提供了一种制备 2'，3'-二脱氢-3'-脱氧-4'-乙炔基胸苷如下所示。 （其中R1和R2独立地表示羟基的保护基，或R1和R2一起形成两个羟基的保护基，R3和R4独立地表示羟基的保护基，R5表示羟基的保护基 基团，R6表示羟基的保护基，X表示离去基，Y表示卤素原子。）