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1. 发明授权

US06563449B2 Successive comparison analog-to-digital converter 有权
公开(公告)号：US06563449B2
公开(公告)日：2003-05-13
申请号：US10166666
申请日：2002-06-12
申请人： Haruhisa Takata , Kazuhiko Nishikawa , Seiji Watanabe , Takahiro Bokui
发明人： Haruhisa Takata , Kazuhiko Nishikawa , Seiji Watanabe , Takahiro Bokui
IPC分类号： H03M112
CPC分类号： H03M1/804 , H03M1/468
摘要： The successive comparison analog-to-digital (A-D) converter includes a plurality of capacitors, a plurality of first analog switches, a plurality of second analog switches, a plurality of third analog switches, a voltage comparator, and a state controller. Each of the plurality of capacitors has a capacitance weighted with a prescribed weighting factor. Each of the plurality of first analog switches has an on-state resistance weighted with a prescribed weighting factor. In the successive comparison A-D converter, a first analog switch corresponding to a capacitor having a capacitance weighted with a larger weighting factor has an on-state resistance weighted with a smaller weighting factor, whereby a time constant for this capacitor can be reduced. As a result, the difference in time constant between the capacitors is reduced. This enables reduction in time required to precharge (sample and hold) an analog input, improving the A-D conversion speed.

2. 发明授权

US08019565B2 Parameter correction circuit and parameter correction method 有权
标题翻译：参数校正电路及参数校正方法
公开(公告)号：US08019565B2
公开(公告)日：2011-09-13
申请号：US12470666
申请日：2009-05-22
申请人： Takahiro Bokui , Kazuhiko Nishikawa
发明人： Takahiro Bokui , Kazuhiko Nishikawa
IPC分类号： G01R35/00 , G06F11/00
CPC分类号： H03L7/099 , H03L7/093 , H03L7/107
摘要： In a parameter correction circuit in an LSI, a reference resistor element with high precision having a resistance value set to a target value is connected to an external terminal of the LSI. A constant current from a mirror circuit connected to a current supply flows through the reference resistor element. A voltage value generated in the reference resistor element is measured by a voltage measuring circuit. The constant current also flows through a variable resistor element. The resistance value of the variable resistor element is adjusted so that a voltage generated in the variable resistor element corresponds to the voltage generated by the reference resistor element.
摘要翻译：在LSI的参数校正电路中，将具有设定为目标值的电阻值的高精度的基准电阻元件连接到LSI的外部端子。来自连接到电流源的镜电路的恒定电流流过参考电阻元件。在参考电阻元件中产生的电压值由电压测量电路测量。恒流也流经可变电阻元件。调整可变电阻元件的电阻值，使得在可变电阻元件中产生的电压对应于由参考电阻元件产生的电压。

3. 发明授权

US06528982B1 Jitter detector, phase difference detector and jitter detecting method 失效
标题翻译：抖动检测器，相位差检测器和抖动检测方法
公开(公告)号：US06528982B1
公开(公告)日：2003-03-04
申请号：US09697721
申请日：2000-10-27
申请人： Naoshi Yanagisawa , Shiro Dosho , Kazuhiko Nishikawa , Seiji Watanabe , Takahiro Bokui
发明人： Naoshi Yanagisawa , Shiro Dosho , Kazuhiko Nishikawa , Seiji Watanabe , Takahiro Bokui
IPC分类号： G01R2500
CPC分类号： G01R25/00
摘要： A jitter detector obtains a phase difference between input signals as a digital value to make jitter between the signals easily detectable. The jitter detector includes comparison pulse generator, periodic signal generator, counter and arithmetic unit. The comparison pulse generator outputs one phase difference comparison pulse after another. Each phase difference comparison pulse has a width representing the phase difference between first and second input signals. The periodic signal generator outputs a periodic signal every time a value obtained by accumulating the widths of the phase difference comparison pulses exceeds a predetermined value. Receiving the periodic signal and a clock signal with a period shorter than that of the periodic signal, the counter counts the number of pulses of the clock signal during one period of the periodic signal and outputs a resultant count. And the arithmetic unit detects and outputs a variation in the count as jitter between the first and second input signals.
摘要翻译：抖动检测器获得输入信号之间的相位差作为数字值，使信号之间的抖动容易检测。抖动检测器包括比较脉冲发生器，周期信号发生器，计数器和算术单元。比较脉冲发生器输出一个相差差值比较脉冲。每个相位差比较脉冲具有表示第一和第二输入信号之间的相位差的宽度。每当通过累加相位差比较脉冲的宽度获得的值超过预定值时，周期性信号发生器输出周期信号。接收到周期信号和周期信号的周期信号的时钟信号，计数器在周期信号的一个周期内对时钟信号的脉冲数进行计数，并输出结果计数。并且算术单元检测并输出计数的变化，作为第一和第二输入信号之间的抖动。

4. 发明申请

US20090234612A1 PARAMETER CORRECTION CIRCUIT AND PARAMETER CORRECTION METHOD 有权
标题翻译：参数校正电路和参数校正方法
公开(公告)号：US20090234612A1
公开(公告)日：2009-09-17
申请号：US12470666
申请日：2009-05-22
申请人： Takahiro BOKUI , Kazuhiko NISHIKAWA
发明人： Takahiro BOKUI , Kazuhiko NISHIKAWA
IPC分类号： G01R35/00
CPC分类号： H03L7/099 , H03L7/093 , H03L7/107
摘要： In a parameter correction circuit in an LSI, a reference resistor element with high precision having a resistance value set to a target value is connected to an external terminal of the LSI. A constant current from a mirror circuit connected to a current supply flows through the reference resistor element. A voltage value generated in the reference resistor element is measured by a voltage measuring circuit. The constant current also flows through a variable resistor element. The resistance value of the variable resistor element is adjusted so that a voltage generated in the variable resistor element corresponds to the voltage generated by the reference resistor element.
摘要翻译：在LSI的参数校正电路中，将具有设定为目标值的电阻值的高精度的基准电阻元件连接到LSI的外部端子。来自连接到电流源的镜电路的恒定电流流过参考电阻元件。在参考电阻元件中产生的电压值由电压测量电路测量。恒流也流经可变电阻元件。调整可变电阻元件的电阻值，使得在可变电阻元件中产生的电压对应于由参考电阻元件产生的电压。

5. 发明申请

US20070088517A1 Parameter correction circuit and parameter correction method 有权
标题翻译：参数校正电路及参数校正方法
公开(公告)号：US20070088517A1
公开(公告)日：2007-04-19
申请号：US11607908
申请日：2006-12-04
申请人： Takahiro Bokui , Kazuhiko Nishikawa
发明人： Takahiro Bokui , Kazuhiko Nishikawa
IPC分类号： G01R35/00
CPC分类号： H03L7/099 , H03L7/093 , H03L7/107
摘要： In a parameter correction circuit in an LSI, a reference resistor element with high precision having a resistance value set to a target value is connected to an external terminal of the LSI. A constant current from a mirror circuit connected to a current supply flows through the reference resistor element. A voltage value generated in the reference resistor element is measured by a voltage measuring circuit. The constant current also flows through a variable resistor element. The resistance value of the variable resistor element is adjusted so that a voltage generated in the variable resistor element corresponds to the voltage generated by the reference resistor element.
摘要翻译：在LSI的参数校正电路中，将具有设定为目标值的电阻值的高精度的基准电阻元件连接到LSI的外部端子。来自连接到电流源的镜电路的恒定电流流过参考电阻元件。在参考电阻元件中产生的电压值由电压测量电路测量。恒流也流经可变电阻元件。调整可变电阻元件的电阻值，使得在可变电阻元件中产生的电压对应于由参考电阻元件产生的电压。

6. 发明授权

US07552023B2 Parameter correction circuit and parameter correction method 有权
标题翻译：参数校正电路及参数校正方法
公开(公告)号：US07552023B2
公开(公告)日：2009-06-23
申请号：US11607908
申请日：2006-12-04
申请人： Takahiro Bokui , Kazuhiko Nishikawa
发明人： Takahiro Bokui , Kazuhiko Nishikawa
IPC分类号： G01R35/00 , G06F11/00
CPC分类号： H03L7/099 , H03L7/093 , H03L7/107
摘要： In a parameter correction circuit in an LSI, a reference resistor element with high precision having a resistance value set to a target value is connected to an external terminal of the LSI. A constant current from a mirror circuit connected to a current supply flows through the reference resistor element. A voltage value generated in the reference resistor element is measured by a voltage measuring circuit. The constant current also flows through a variable resistor element. The resistance value of the variable resistor element is adjusted so that a voltage generated in the variable resistor element corresponds to the voltage generated by the reference resistor element.
摘要翻译：在LSI的参数校正电路中，将具有设定为目标值的电阻值的高精度的基准电阻元件连接到LSI的外部端子。来自连接到电流源的镜电路的恒定电流流过参考电阻元件。在参考电阻元件中产生的电压值由电压测量电路测量。恒流也流经可变电阻元件。调整可变电阻元件的电阻值，使得在可变电阻元件中产生的电压对应于由参考电阻元件产生的电压。

7. 发明授权

US07152009B2 Parameter correction circuit and parameter correction method 有权
公开(公告)号：US07152009B2
公开(公告)日：2006-12-19
申请号：US10724189
申请日：2003-12-01
申请人： Takahiro Bokui , Kazuhiko Nishikawa
发明人： Takahiro Bokui , Kazuhiko Nishikawa
IPC分类号： H03L7/06
CPC分类号： H03L7/099 , H03L7/093 , H03L7/107
摘要： In a parameter correction circuit in an LSI, a reference resistor element with high precision having a resistance value set to a target value is connected to an external terminal of the LSI. A constant current from a mirror circuit connected to a current supply flows through the reference resistor element. A voltage value generated in the reference resistor element is measured by a voltage measuring circuit. The constant current also flows through a variable resistor element. The resistance value of the variable resistor element is adjusted so that a voltage generated in the variable resistor element corresponds to the voltage generated by the reference resistor element.

8. 发明申请

US20050110530A1 Differential output circuit 审中-公开
标题翻译：差分输出电路
公开(公告)号：US20050110530A1
公开(公告)日：2005-05-26
申请号：US10988524
申请日：2004-11-16
申请人： Masahiro Aoike , Yoshinori Miyada , Takahiro Bokui
发明人： Masahiro Aoike , Yoshinori Miyada , Takahiro Bokui
IPC分类号： H03K5/003 , H03K5/22 , H03K19/0175 , H04L25/02
CPC分类号： H04L25/0274 , H03K5/003 , H04L25/028
摘要： A differential output circuit which performs data transmission by means of a differential current comprises: a first current source for outputting an electric current to the outside of the circuit; a second current source for introducing an electric current from the outside of the circuit; an output polarity switching circuit for switching the polarity of the differential current generated by the first and second current sources; a voltage source for supplying a predetermined voltage; and a resistor connected between a predetermined node and the voltage source, the predetermined node being interposed between the first and second current sources.
摘要翻译：通过差分电流进行数据传输的差分输出电路包括：用于向电路外部输出电流的第一电流源; 用于从电路的外部引入电流的第二电流源; 输出极性切换电路，用于切换由第一和第二电流源产生的差动电流的极性; 用于提供预定电压的电压源; 以及连接在预定节点和电压源之间的电阻器，所述预定节点插在第一和第二电流源之间。

9. 发明授权

US06674330B2 Recording clock generation circuit 有权
标题翻译：录制时钟发生电路
公开(公告)号：US06674330B2
公开(公告)日：2004-01-06
申请号：US10215159
申请日：2002-08-08
申请人： Takahiro Bokui , Takahiro Ochi , Yoshinori Miyada , Yutaka Murata
发明人： Takahiro Bokui , Takahiro Ochi , Yoshinori Miyada , Yutaka Murata
IPC分类号： H03L700
CPC分类号： G11B20/1403 , G11B7/0053 , G11B20/10222 , G11B20/22 , H03L7/081 , H03L7/087
摘要： A recording clock generation circuit includes a first phase comparator for detecting a phase difference between a wobble signal and a PLL internal signal; a first filter for smoothing an output from the first phase comparator; a VCO circuit for oscillating in accordance with the output smoothed by the first filter; a frequency divider for dividing a frequency of an output from the VCO circuit; a phase adjusting circuit for adjusting a phase of an output from the frequency divider; and a second phase comparator for detecting a phase difference between the wobble signal and a pre-pit signal, and outputting the phase difference to the phase adjusting circuit.
摘要翻译：记录时钟产生电路包括用于检测摆动信号和PLL内部信号之间的相位差的第一相位比较器; 用于平滑来自第一相位比较器的输出的第一滤波器; VCO电路，用于根据由第一滤波器平滑的输出振荡; 用于分频来自VCO电路的输出频率的分频器; 相位调整电路，用于调节来自分频器的输出的相位; 以及第二相位比较器，用于检测摆动信号和预凹陷信号之间的相位差，并将相位差输出到相位调整电路。

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