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1. 发明授权

US07477099B2 Filter adjustment circuit 有权
标题翻译：滤波器调节电路
公开(公告)号：US07477099B2
公开(公告)日：2009-01-13
申请号：US11792081
申请日：2005-09-02
申请人： Kouji Okamoto , Takashi Morie , Shiro Dosho , Hirokuni Fujiyama
发明人： Kouji Okamoto , Takashi Morie , Shiro Dosho , Hirokuni Fujiyama
IPC分类号： H03B1/00
CPC分类号： H03G5/16 , H03H11/1291 , H03H11/20
摘要： In a filter adjustment circuit for an analog filter circuit such as a Gm-C filter, an input signal IS from a reference signal generation circuit 1 is inputted to a Gm-C filter 2 to be filtered and then converted by a conversion circuit 3 to a digital signal. A reference signal RS from the reference signal generation circuit 1 is converted by a conversion circuit 4 to a digital signal. The two converted signals are held in time series in a holding circuit 5. A timing generation circuit 6 generates an update timing signal en based on a reference time-series signal ref from the holding circuit 5. A control signal generation circuit 7 generates a control signal CS based on the reference time-series signal ref and a filter output time-series signal tgt, each from the holding circuit 5. The control signal CS is inputted to the Gm-C filter 2 in response to the update timing signal en to adjust the gain of the Gm-C filter 2. As a result, variations in the response characteristics of the Gm-C filter 2 are adjusted with high accuracy with a simple circuit structure.
摘要翻译：在用于诸如Gm-C滤波器的模拟滤波器电路的滤波器调节电路中，来自参考信号产生电路1的输入信号IS被输入到要过滤的Gm-C滤波器2，然后由转换电路3转换成数字信号。来自参考信号发生电路1的参考信号RS由转换电路4转换成数字信号。两个转换信号在保持电路5中保持时间序列。定时产生电路6基于来自保持电路5的基准时间序列信号ref产生更新定时信号en。控制信号产生电路7产生控制基于参考时间序列信号ref的信号CS和来自保持电路5的滤波器输出时间序列信号tgt。控制信号CS响应于更新定时信号en至...而被输入到Gm-C滤波器2 调整Gm-C滤波器2的增益。结果，以简单的电路结构，高精度地调整Gm-C滤波器2的响应特性的变化。

2. 发明申请

US20080218255A1 Filter Characteristic Adjusting Apparatus and Filter Characteristic Adjusting Method 有权
标题翻译：过滤特性调节装置和过滤器特性调整方法
公开(公告)号：US20080218255A1
公开(公告)日：2008-09-11
申请号：US11792946
申请日：2005-11-29
申请人： Hirokuni Fujiyama , Takashi Morie , Hiroya Ueno
发明人： Hirokuni Fujiyama , Takashi Morie , Hiroya Ueno
IPC分类号： H03K5/00
CPC分类号： H03H11/08 , H03H11/1291
摘要： There is provided a filter characteristic adjusting apparatus and a filter characteristic adjusting method which can avoid an increase in circuit scale of the filter characteristic adjusting apparatus, and can speedily adjust a characteristic frequency of the filter to a desired frequency. When performing characteristic adjustment for the filter, the test signal generation unit (31) generates a test signal (s14) which is a pulse signal having the same frequency as the characteristic frequency of the filter (10) on the basis of a reference signal (s17), and a phase-shifted test signal (s14′) that is obtained by shifting the phase of the test signal (s14) by a predetermined amount with a phase shift unit (32) in a control signal generation unit (33) is compared with a filter output signal (s16) that is obtained by inputting the test signal (s14) into the filter (10) to obtain a phase difference between the signals, and then the phase difference is subjected to a binary search to generate a control signal (s11).
摘要翻译：提供一种滤波特性调节装置和滤波器特性调整方法，其可以避免滤波器特性调节装置的电路规模的增加，并且可以将滤波器的特征频率快速调整到期望的频率。当对滤波器进行特性调整时，测试信号生成单元（31）基于参考信号产生作为与滤波器（10）的特征频率相同频率的脉冲信号的测试信号（s 14）（s 17）和通过在控制信号生成单元（32）中用相移单元（32）将测试信号（s 14）的相位移位预定量而获得的相移测试信号（s 14'）（33）与通过将测试信号（s 14）输入到滤波器（10）中以获得信号之间的相位差而获得的滤波器输出信号（s 16）进行比较，然后将相位差进行二进制搜索以产生控制信号（s 11）。

3. 发明申请

US20060088136A1 Complex filter circuit and receiver circuit 失效
公开(公告)号：US20060088136A1
公开(公告)日：2006-04-27
申请号：US11247136
申请日：2005-10-12
申请人： Takashi Morie , Hiroya Ueno , Hirokuni Fujiyama , Joji Hayashi , Akinori Matsumoto , Katsumasa Hijikata
发明人： Takashi Morie , Hiroya Ueno , Hirokuni Fujiyama , Joji Hayashi , Akinori Matsumoto , Katsumasa Hijikata
IPC分类号： H04B1/10
CPC分类号： H04B1/123 , H04B1/30
摘要： A pseudo-image signal producing section produces a pseudo-image signal imitating an actual image signal. An amplitude detection section detects the amplitude of the pseudo-image signal having passed through a complex filter circuit. A filter control section controls an element value control section in the complex filter circuit so as to decrease the detected amplitude. The element value control section performs an element value adjustment so that absolute element values of a pair of elements corresponding to each other in two filter circuits in the complex filter circuit increase/decrease in opposite directions.

4. 发明授权

US06714075B2 Variable gain amplifier and filter circuit 有权
标题翻译：可变增益放大器和滤波电路
公开(公告)号：US06714075B2
公开(公告)日：2004-03-30
申请号：US10286814
申请日：2002-11-04
申请人： Takashi Morie , Hirokuni Fujiyama
发明人： Takashi Morie , Hirokuni Fujiyama
IPC分类号： H03F345
CPC分类号： H03F3/72 , H03F3/45197 , H03F2203/45648 , H03F2203/45694 , H03F2203/7224 , H03G1/0023 , H03H11/0444 , H03H11/0466 , H03H11/0472
摘要： The variable gain amplifier of the invention includes an input node pair, a first output node pair, a voltage-current converter, a plurality of first resistances, a first current source, a second current source, a second output node pair, a third output node pair and a switch circuit. A differential signal supplied to the input node pair is amplified with a predetermined gain (first gain) and output from the second output node pair. The differential signal is also amplified with a gain (second gain) corresponding to the resistance value between one interconnection node and another interconnection node, among the interconnection nodes connecting the plurality of first resistances, connected to the third output node pair via the switch circuit, and output from the third output node pair. The second gain can be changed by changing the two interconnection nodes connected to the third output node pair via the switch circuit.
摘要翻译：本发明的可变增益放大器包括输入节点对，第一输出节点对，电压 - 电流转换器，多个第一电阻，第一电流源，第二电流源，第二输出节点对，第三输出节点对和开关电路。提供给输入节点对的差分信号以预定增益（第一增益）放大并从第二输出节点对输出。在通过开关电路连接到连接到第三输出节点对的多个第一电阻的互连节点之间，差分信号也被放大为与一个互连节点和另一个互连节点之间的电阻值相对应的增益（第二增益）并从第三输出节点对输出。可以通过改变通过开关电路连接到第三输出节点对的两个互连节点来改变第二增益。

5. 发明授权

US08093881B2 Reference voltage generation circuit with start-up circuit 有权
标题翻译：具有启动电路的基准电压发生电路
公开(公告)号：US08093881B2
公开(公告)日：2012-01-10
申请号：US13040918
申请日：2011-03-04
申请人： Hirokuni Fujiyama
发明人： Hirokuni Fujiyama
IPC分类号： G05F3/16
CPC分类号： H03F3/45183 , G05F3/30 , H03F2203/45136 , H03F2203/45568 , H03F2203/45674 , Y10S323/901
摘要： A first resistance element is coupled between a first rectifying element and an output node at which a reference voltage is generated. Second and third resistance elements are coupled in series between a second rectifying element and the output node. A differential amplifier outputs a control voltage corresponding to a difference between a first voltage generated at a connection point of the first rectifying element and the first resistance element and a second voltage generated at a connection point of the second resistance element and the third resistance element. A control circuit supplies a control current corresponding to the control voltage from the differential amplifier. A start-up circuit causes, by supplying a start-up current to the output node in response to supply of a power supply voltage, transition from a first stable state to a second stable state.
摘要翻译：第一电阻元件耦合在第一整流元件和产生参考电压的输出节点之间。第二和第三电阻元件串联耦合在第二整流元件和输出节点之间。差分放大器输出对应于在第一整流元件的连接点产生的第一电压与第一电阻元件之间的差和与在第二电阻元件和第三电阻元件的连接点处产生的第二电压的差的控制电压。控制电路从差分放大器提供与控制电压相对应的控制电流。启动电路通过响应于电源电压的供应向输出节点提供启动电流，从第一稳定状态转变到第二稳定状态。

6. 发明授权

US07688059B2 Filter characteristic adjusting apparatus and filter characteristic adjusting method 有权
标题翻译：滤波器特性调节装置和滤波器特性调整方法
公开(公告)号：US07688059B2
公开(公告)日：2010-03-30
申请号：US11792946
申请日：2005-11-29
申请人： Hirokuni Fujiyama , Takashi Morie , Hiroya Ueno
发明人： Hirokuni Fujiyama , Takashi Morie , Hiroya Ueno
IPC分类号： G01R23/165
CPC分类号： H03H11/08 , H03H11/1291
摘要： There is provided a filter characteristic adjusting apparatus and a filter characteristic adjusting method which can avoid an increase in circuit scale of the filter characteristic adjusting apparatus, and can speedily adjust a characteristic frequency of the filter to a desired frequency. When performing characteristic adjustment for the filter, the test signal generation unit (31) generates a test signal (s14) which is a pulse signal having the same frequency as the characteristic frequency of the filter (10) on the basis of a reference signal (s17), and a phase-shifted test signal (s14′) that is obtained by shifting the phase of the test signal (s14) by a predetermined amount with a phase shift unit (32) in a control signal generation unit (33) is compared with a filter output signal (s16) that is obtained by inputting the test signal (s14) into the filter (10) to obtain a phase difference between the signals, and then the phase difference is subjected to a binary search to generate a control signal (s11).
摘要翻译：提供一种滤波特性调节装置和滤波器特性调整方法，其可以避免滤波器特性调节装置的电路规模的增加，并且可以将滤波器的特征频率快速调整到期望的频率。当对滤波器进行特性调整时，测试信号生成单元（31）基于参考信号（...）生成与滤波器（10）的特征频率相同的频率的脉冲信号的测试信号（s14） s17），并且通过控制信号生成单元（33）中的相移单元（32）将测试信号（s14）的相位移位预定量而获得的相移测试信号（s14'）是与通过将测试信号（s14）输入到滤波器（10）中以获得信号之间的相位差而获得的滤波器输出信号（s16）相比较，然后对相位差进行二进制搜索以产生控制信号（s11）。

7. 发明授权

US07587010B2 Complex filter circuit and receiver circuit 失效
标题翻译：复杂滤波电路和接收电路
公开(公告)号：US07587010B2
公开(公告)日：2009-09-08
申请号：US11247136
申请日：2005-10-12
申请人： Takashi Morie , Hiroya Ueno , Hirokuni Fujiyama , Joji Hayashi , Akinori Matsumoto , Katsumasa Hijikata
发明人： Takashi Morie , Hiroya Ueno , Hirokuni Fujiyama , Joji Hayashi , Akinori Matsumoto , Katsumasa Hijikata
IPC分类号： H04B1/10
CPC分类号： H04B1/123 , H04B1/30
摘要： A pseudo-image signal producing section produces a pseudo-image signal imitating an actual image signal. An amplitude detection section detects the amplitude of the pseudo-image signal having passed through a complex filter circuit. A filter control section controls an element value control section in the complex filter circuit so as to decrease the detected amplitude. The element value control section performs an element value adjustment so that absolute element values of a pair of elements corresponding to each other in two filter circuits in the complex filter circuit increase/decrease in opposite directions.
摘要翻译：伪图像信号产生部分产生模拟实际图像信号的伪图像信号。振幅检测部分检测已经通过复数滤波器电路的伪图像信号的幅度。滤波器控制部分控制复数滤波器电路中的元件值控制部分，以便减小检测到的幅度。元件值控制部分执行元件值调整，使得复数滤波器电路中的两个滤波器电路中彼此对应的一对元件的绝对元素值在相反方向上增加/减少。

8. 发明申请

US20110156690A1 REFERENCE VOLTAGE GENERATION CIRCUIT 有权
标题翻译：参考电压发生电路
公开(公告)号：US20110156690A1
公开(公告)日：2011-06-30
申请号：US13040918
申请日：2011-03-04
申请人： Hirokuni FUJIYAMA
发明人： Hirokuni FUJIYAMA
IPC分类号： G05F1/10
CPC分类号： H03F3/45183 , G05F3/30 , H03F2203/45136 , H03F2203/45568 , H03F2203/45674 , Y10S323/901
摘要： A first resistance element is coupled between a first rectifying element and an output node at which a reference voltage is generated. Second and third resistance elements are coupled in series between a second rectifying element and the output node. A differential amplifier outputs a control voltage corresponding to a difference between a first voltage generated at a connection point of the first rectifying element and the first resistance element and a second voltage generated at a connection point of the second resistance element and the third resistance element. A control circuit supplies a control current corresponding to the control voltage from the differential amplifier. A start-up circuit causes, by supplying a start-up current to the output node in response to supply of a power supply voltage, transition from a first stable state to a second stable state.
摘要翻译：第一电阻元件耦合在第一整流元件和产生参考电压的输出节点之间。第二和第三电阻元件串联耦合在第二整流元件和输出节点之间。差分放大器输出对应于在第一整流元件的连接点产生的第一电压与第一电阻元件之间的差和与在第二电阻元件和第三电阻元件的连接点处产生的第二电压的差的控制电压。控制电路从差分放大器提供与控制电压相对应的控制电流。启动电路通过响应于电源电压的供应向输出节点提供启动电流，从第一稳定状态转变到第二稳定状态。

9. 发明授权

US07523154B2 Write compensation circuit and signal interpolation circuit of recording device 有权
标题翻译：写记录装置的补偿电路和信号插补电路
公开(公告)号：US07523154B2
公开(公告)日：2009-04-21
申请号：US11198950
申请日：2005-08-08
申请人： Hirokuni Fujiyama , Shiro Dosho , Hiroyuki Nakahira , Akira Yamamoto , Hiroki Mouri
发明人： Hirokuni Fujiyama , Shiro Dosho , Hiroyuki Nakahira , Akira Yamamoto , Hiroki Mouri
IPC分类号： G06G7/00
CPC分类号： G11B20/10 , G11B5/09 , G11B20/10194 , G11B20/10212 , G11B2005/0005 , H03K5/082 , H03K5/13 , H03K5/133
摘要： A write compensation circuit of a recording device includes a first delay portion driven by a first driving voltage, for receiving a clock signal, delaying the clock signal by a first delay time, and outputting the delayed clock signal, and a voltage supplying portion for supplying the first driving voltage to the first delay portion in such a manner that the first delay time is substantially equal to a clock period of the clock signal.
摘要翻译：记录装置的写补偿电路包括由第一驱动电压驱动的第一延迟部分，用于接收时钟信号，延迟时钟信号第一延迟时间，并输出延迟时钟信号;以及电压提供部分，用于提供第一驱动电压到第一延迟部分，使得第一延迟时间基本上等于时钟信号的时钟周期。

10. 发明授权

US06970313B1 Write compensation circuit and signal interpolation circuit of recording device 失效
标题翻译：写记录装置的补偿电路和信号插补电路
公开(公告)号：US06970313B1
公开(公告)日：2005-11-29
申请号：US09539206
申请日：2000-03-30
申请人： Hirokuni Fujiyama , Shiro Dosho , Hiroyuki Nakahira , Akira Yamamoto , Hiroki Mouri
发明人： Hirokuni Fujiyama , Shiro Dosho , Hiroyuki Nakahira , Akira Yamamoto , Hiroki Mouri
IPC分类号： G11B5/00 , G11B5/09 , G11B20/10 , H03K5/08 , H03K5/13
CPC分类号： G11B20/10 , G11B5/09 , G11B20/10194 , G11B20/10212 , G11B2005/0005 , H03K5/082 , H03K5/13 , H03K5/133
摘要： A write compensation circuit of a recording device includes a first delay portion driven by a first driving voltage, for receiving a clock signal, delaying the clock signal by a first delay time, and outputting the delayed clock signal, and a voltage supplying portion for supplying the first driving voltage to the first delay portion in such a manner that the first delay time is substantially equal to a clock period of the clock signal.
摘要翻译：记录装置的写补偿电路包括由第一驱动电压驱动的第一延迟部分，用于接收时钟信号，延迟时钟信号第一延迟时间，并输出延迟时钟信号;以及电压提供部分，用于提供第一驱动电压到第一延迟部分，使得第一延迟时间基本上等于时钟信号的时钟周期。

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