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1. 发明授权

US5585795A D/A converter including output buffer having a controllable offset voltage 失效
标题翻译： D / A转换器包括具有可控失调电压的输出缓冲器
公开(公告)号：US5585795A
公开(公告)日：1996-12-17
申请号：US293279
申请日：1994-08-16
申请人： Tachio Yuasa , Osamu Kobayashi , Kunihiko Gotoh
发明人： Tachio Yuasa , Osamu Kobayashi , Kunihiko Gotoh
IPC分类号： H03M1/10 , H03M1/66 , H03M1/68 , H03M1/70 , H03M1/76 , H03M1/06
CPC分类号： H03M1/682 , H03M1/765
摘要： A D/A converter includes an analog voltage generating circuit for generating an analog voltage, and an offset-controllable amplifier amplifying the analog voltage with a predetermined amplification factor and outputting an analog output signal. An offset voltage generating circuit generates an offset voltage which is varied on the basis of a digital input signal. The offset voltage controls an offset of the offset-controllable amplifier.
摘要翻译： D / A转换器包括用于产生模拟电压的模拟电压产生电路和以预定的放大系数放大模拟电压并输出模拟输出信号的偏移可控放大器。偏移电压产生电路产生基于数字输入信号变化的偏移电压。偏移电压控制偏移可控放大器的偏移。

2. 发明授权

US5252975A Digital-to-analog converter having resistor networks 失效
标题翻译：具有电阻网络的数模转换器
公开(公告)号：US5252975A
公开(公告)日：1993-10-12
申请号：US899963
申请日：1992-06-17
申请人： Tachio Yuasa , Osamu Kobayashi , Kunihiko Gotoh
发明人： Tachio Yuasa , Osamu Kobayashi , Kunihiko Gotoh
IPC分类号： H03M1/68 , H03M1/76
CPC分类号： H03M1/682 , H03M1/765
摘要： A D/A converter includes a first resistor network including K resistors each having a resistance, where K is an integer, and a second resistor network including L resistors connected in series where L is an integer. The sum of resistances of the L resistors is approximately equal to the resistance of each of the K resistors. The D/A converter further includes a first switching part, coupled to the K resistors, for selecting (K-1) resistors among the K resistors in accordance with a digital input signal and for forming a series circuit including the (K-1) resistors and the second resistor network connected in series, first and second voltages being applied to respective ends of the series circuit. Furthermore, the D/A converter includes a second switching part, coupled to the second series circuit, for connecting one of the L resistors to an output terminal of the D/A converter.

3. 发明授权

US5606287A Operational amplifier having stable operations for a wide range of source voltage, and current detector circuit employing a small number of elements 失效
标题翻译：运算放大器具有稳定的工作范围，用于各种源极电压，而电流检测电路采用少量元件
公开(公告)号：US5606287A
公开(公告)日：1997-02-25
申请号：US412561
申请日：1995-03-29
申请人： Osamu Kobayashi , Atsushi Matsuda , Tachio Yuasa
发明人： Osamu Kobayashi , Atsushi Matsuda , Tachio Yuasa
IPC分类号： H03F1/30 , H03F3/30 , H03F3/345 , H03F3/26
CPC分类号： H03F3/345 , H03F1/308 , H03F3/3001 , H03F3/3023 , H03F3/3028
摘要： An operational amplifier has a differential amplification section, an output section, a control signal generation unit, and a drive control unit. The output section has a first transistor of a first conductivity type and a second transistor of a second conductivity type that is opposite to the first conductivity type. The first and second transistors are connected in series between a first power source unit and a second power source unit, and the first transistor is driven according to an output of the differential amplification section. The control signal generation unit is used to detect a current flowing through the first transistor and generate a control signal in response to the detected current. The drive control unit is used to drive the second transistor in response to the control signal.
摘要翻译：运算放大器具有差分放大部分，输出部分，控制信号产生单元和驱动控制单元。输出部分具有与第一导电类型相反的第一导电类型的第一晶体管和第二导电类型的第二晶体管。第一和第二晶体管串联连接在第一电源单元和第二电源单元之间，并且第一晶体管根据差分放大部分的输出被驱动。控制信号生成单元用于检测流过第一晶体管的电流，并响应于检测到的电流产生控制信号。驱动控制单元用于响应于控制信号来驱动第二晶体管。

4. 发明授权

US5673002A Operational amplifier having stable operations for a wide range of source voltage, and current detector circuit employing a small number of elements 失效
公开(公告)号：US5673002A
公开(公告)日：1997-09-30
申请号：US694288
申请日：1996-08-08
申请人： Osamu Kobayashi , Atsushi Matsuda , Tachio Yuasa
发明人： Osamu Kobayashi , Atsushi Matsuda , Tachio Yuasa
IPC分类号： H03F1/30 , H03F3/30 , H03F3/345 , H03F3/04
CPC分类号： H03F3/345 , H03F1/308 , H03F3/3001 , H03F3/3023 , H03F3/3028
摘要： An operational amplifier has a differential amplification section, an output section, a control signal generation unit, and a drive control unit. The output section has a first transistor of a first conductivity type and a second transistor of a second conductivity type that is opposite to the first conductivity type. The first and second transistors are connected in series between a first power source unit and a second power source unit, and the first transistor is driven according to an output of the differential amplification section. The control signal generation unit is used to detect a current flowing through the first transistor and generate a control signal in response to the detected current. The drive control unit is used to drive the second transistor in response to the control signal.

5. 发明申请

US20110050342A1 Push-pull amplifier circuit and operational amplifier circuit using the same 有权
标题翻译：推挽放大电路和运算放大器电路使用相同
公开(公告)号：US20110050342A1
公开(公告)日：2011-03-03
申请号：US12805265
申请日：2010-07-21
申请人： Tachio Yuasa
发明人： Tachio Yuasa
IPC分类号： H03F3/45 , H03F3/26
CPC分类号： H03F3/3022 , H03F3/45183 , H03F2203/45632 , H03F2203/45674
摘要： A push-pull amplifier including first to third current paths. The first current path includes first transistor allowing first current to flow through the first current path according to input signal. The second current path includes second transistor allowing second current having opposite phase to the first current to flow through the second current path according to the first current; first resistor; and third transistor connected to one end of the first resistor and having control terminal connected to the other end of the first resistor. The third current path includes output terminal; fourth transistor allowing current having the same phase as the first current to flow through the third current path according to the input signal; and fifth transistor allowing current having the same phase as the second current to flow through the third current path according to voltage of first node between the first resistor and the third transistor.
摘要翻译：包括第一至第三电流路径的推挽放大器。第一电流路径包括允许第一电流根据输入信号流过第一电流路径的第一晶体管。第二电流路径包括允许与第一电流相反相位的第二电流根据第一电流流过第二电流路径的第二晶体管; 第一电阻; 所述第三晶体管连接到所述第一电阻器的一端并且具有连接到所述第一电阻器的另一端的控制端子。第三电流路径包括输出端子; 第四晶体管，其允许具有与所述第一电流相同相位的电流根据所述输入信号流过所述第三电流路径; 以及第五晶体管，其允许具有与第二电流相同相位的电流根据第一电阻器和第三晶体管之间的第一节点的电压流过第三电流路径。

6. 发明申请

US20100271132A1 Amplifier circuit with resistive current limitter 审中-公开
标题翻译：具有电阻电流限制器的放大器电路
公开(公告)号：US20100271132A1
公开(公告)日：2010-10-28
申请号：US12662514
申请日：2010-04-21
申请人： Tachio Yuasa
发明人： Tachio Yuasa
IPC分类号： H03F3/16
CPC分类号： H03F3/345
摘要： An amplifier circuit includes first transistor of first conductivity type having source connected to first power supply, while having gate connected to input terminal and drain connected to output terminal; transistor of second conductivity type having source connected to second power supply and drain connected to the output terminal; second transistor of the first conductivity type whose source and gate are connected to the source and gate of the first transistor of the first conductivity type, respectively; resistor whose one end connected to drain of the second transistor of the first conductivity type, and an output control circuit; current input terminal connected to the opposite end of the resistor; and voltage output terminal connected to the gate of the transistor of the second conductivity type. The output control circuit controls the gate voltage of the transistor of the second conductivity type based on the input current of the current input terminal.
摘要翻译：放大器电路包括：第一导电类型的第一晶体管，其源极连接到第一电源，同时具有连接到输入端子的栅极和连接到输出端子的漏极; 具有源极的第二导电类型的晶体管连接到连接到输出端子的第二电源和漏极; 第一导电类型的第二晶体管，其源极和栅极分别连接到第一导电类型的第一晶体管的源极和栅极; 电阻器的一端连接到第一导电类型的第二晶体管的漏极，以及输出控制电路; 电流输入端连接到电阻的另一端; 并且电压输出端子连接到第二导电类型的晶体管的栅极。输出控制电路基于电流输入端子的输入电流来控制第二导电类型的晶体管的栅极电压。

7. 发明申请

US20100007417A1 Differential amplifier with symmetric circuit topology 有权
标题翻译：具有对称电路拓扑的差分放大器
公开(公告)号：US20100007417A1
公开(公告)日：2010-01-14
申请号：US12314979
申请日：2008-12-19
申请人： Tachio Yuasa
发明人： Tachio Yuasa
IPC分类号： H03F3/45
CPC分类号： H03F3/45219 , H03F2203/45212 , H03F2203/45646 , H03F2203/45681
摘要： A differential amplifier circuit is provided with a first input stage including a transistor pair of a first conductivity type, of which transistor pair receives differential input signals; a first output stage connected to the first input stage; a second input stage including a transistor pair of a second conductivity type different from the first conductivity type, of which transistor pair receives the differential input signals; a second output stage connected to the second input stage; and an output terminal. The second output stage is structured with a circuit topology in which transistors of the first conductivity type in the first output stage are replaced with transistors of the second conductivity type, transistors of the second conductivity type in the first output stage are replaced with transistors of the first conductivity type, ground terminals in the first output stage are replaced with power supply terminals, and power supply terminals in the first output stage are replaced with ground terminals. The output terminal is commonly connected to outputs of the first and second output stages.
摘要翻译：差分放大器电路设置有包括第一导电类型的晶体管对的第一输入级，其中晶体管对接收差分输入信号; 连接到第一输入级的第一输出级; 第二输入级，其包括不同于第一导电类型的第二导电类型的晶体管对，其中晶体管对接收差分输入信号; 连接到第二输入级的第二输出级; 和输出端子。第二输出级由电路拓扑构成，其中第一输出级中的第一导电类型的晶体管被第二导电类型的晶体管代替，第一输出级中的第二导电类型的晶体管被替换为第一导电类型，第一输出级中的接地端子被替换为电源端子，并且第一输出级中的电源端子被替换为接地端子。输出端子通常连接到第一和第二输出级的输出。

8. 发明申请

US20090231038A1 Differential amplifier 有权
标题翻译：差分放大器
公开(公告)号：US20090231038A1
公开(公告)日：2009-09-17
申请号：US12379586
申请日：2009-02-25
申请人： Tachio Yuasa
发明人： Tachio Yuasa
IPC分类号： H03F3/45
CPC分类号： H03F3/45192 , H03F3/3022 , H03F3/45632 , H03F2203/45076 , H03F2203/45078 , H03F2203/45366 , H03F2203/45648
摘要： A differential amplifier includes a differential amplifier section to generate a current composed of a differential-mode current and a first common-mode current according to a differential-mode component and a common-mode component of an input signal, a common-mode current generator section to generate a common-mode current according to the common-mode component of the input signal, and a current amplifier section to receive the current and the common-mode current, amplify a difference between the current and the common-mode current and output a result.
摘要翻译：差分放大器包括差分放大器部分，用于根据差分模式分量和输入信号的共模分量产生由差模电流和第一共模电流组成的电流，共模电流发生器部分，以根据输入信号的共模分量产生共模电流，以及电流放大器部分，用于接收电流和共模电流，放大电流和共模电流之间的差，并输出结果。

9. 发明授权

US5568147A Digital-to-analog converter for reducing occupied area thereof 失效
标题翻译：用于减少占用面积的数模转换器
公开(公告)号：US5568147A
公开(公告)日：1996-10-22
申请号：US334343
申请日：1994-11-02
申请人： Atsushi Matsuda , Tachio Yuasa
发明人： Atsushi Matsuda , Tachio Yuasa
IPC分类号： H03M1/68 , H03M1/74 , H03M1/76 , H03M1/80
CPC分类号： H03M1/687 , H03M1/765 , H03M1/808
摘要： A D/A converter has a first partial circuit, and second and third partial circuits connected with said first partial circuit. The first partial circuit has a first row of K resistors of the same resistance value and groups of switches provided for the resistors, to select "K-1" resistors among said K resistors and connect said selected resistors in series with said second and third partial circuits. The second partial circuit has a second row of L resistors, a first group of switches connected in series with said resistors, respectively, and a second group of switches connected in parallel with said series-connected second row of resistors and said first group of switches, respectively. The third partial circuit has a third row of L resistors, a third group of switches connected in series with said resistors, respectively, and a fourth group of switches connected in parallel with said series-connected third row of resistors and said third group of switches, respectively. Therefore, the D/A converter can reduces an occupied area thereof, and increases the number of D/A converter chips to be fabricated on a wafer, to thereby reduce the costs of the D/A converters.
摘要翻译： D / A转换器具有第一部分电路，以及与所述第一部分电路连接的第二和第三部分电路。第一部分电路具有相同电阻值的第一排K电阻器和为电阻器提供的开关组，以在所述K个电阻器中选择“K-1”电阻器，并将所选择的电阻器与所述第二和第三部分串联连接电路。第二部分电路具有第二排L电阻器，分别与所述电阻器串联连接的第一组开关，以及与所述串联连接的第二排电阻器和所述第一组开关并联连接的第二组开关，分别。第三部分电路具有第三排L电阻器，分别与所述电阻器串联的第三组开关，以及与所述串联连接的第三排电阻器和所述第三组开关并联连接的第四组开关，分别。因此，D / A转换器可以减少其占用面积，并且增加要在晶片上制造的D / A转换器芯片的数量，从而降低D / A转换器的成本。

10. 发明授权

US08441312B2 Reference current generating circuit 有权
标题翻译：参考电流发生电路
公开(公告)号：US08441312B2
公开(公告)日：2013-05-14
申请号：US13044316
申请日：2011-03-09
申请人： Tachio Yuasa
发明人： Tachio Yuasa
IPC分类号： G05F1/10
CPC分类号： G05F3/24
摘要： A reference current generating circuit has: first and second current mirror circuits and first and second output terminals. The first current mirror circuit has: a first transistor of a first polarity being an input-side transistor; and a first resistor connected between a gate of the first transistor and a power supply terminal. The second current mirror circuit has a second transistor of a second polarity being an input-side transistor. An output node of the first current mirror circuit is connected to an input node of the second current mirror circuit, and an input node of the first current mirror circuit is connected to an output node of the second current mirror circuit. A control voltage applied to the gate of the first transistor is output from the first output terminal. A control voltage applied to a gate of the second transistor is output from the second output terminal.
摘要翻译：参考电流产生电路具有：第一和第二电流镜电路以及第一和第二输出端。第一电流镜电路具有：第一极性的第一晶体管是输入侧晶体管; 以及连接在第一晶体管的栅极和电源端子之间的第一电阻器。第二电流镜电路具有作为输入侧晶体管的第二极性的第二晶体管。第一电流镜电路的输出节点连接到第二电流镜电路的输入节点，第一电流镜电路的输入节点连接到第二电流镜电路的输出节点。从第一输出端子输出施加到第一晶体管的栅极的控制电压。从第二输出端子输出施加到第二晶体管的栅极的控制电压。

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