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1. 发明授权

CN102783026B 一种轨条对轨条比较器有权
公开(公告)号：CN102783026B
公开(公告)日：2016-03-09
申请号：CN201180012121.2
申请日：2011-03-14
申请人：密克罗奇普技术公司
发明人：阿尼鲁达·巴沙尔
IPC分类号： H03K3/3565 , H03F3/45
CPC分类号： H03K3/3565 , H03F3/45699
摘要：一种具有输入级的轨条对轨条比较器追踪所述输入级的Gm(跨导)改变，所述输入级具有独立的正及负差动电压偏移补偿。通过追踪所述输入级的Gm(跨导)改变，所述轨条对轨条比较器的磁滞变得对输入共模电压不敏感。一种两级轨条对轨条比较器可用于将磁滞加到第二级。所述两级轨条对轨条比较器的第一级大体上以单位增益进行操作。所述两级轨条对轨条比较器的所述第二级起具有磁滞的规则高增益放大器的作用。额外电路追踪所述第一级的Gm(跨导)改变，以使所述第二级磁滞对所述第一级处的所述输入共模电压不敏感。这也使得更容易产生一可编程磁滞，所述磁滞对所有输入电压值都是准确的。

2. 发明公开

CN102783026A 用于具有大动态范围的轨条对轨条比较器的偏移校准及精度磁滞有权
公开(公告)号：CN102783026A
公开(公告)日：2012-11-14
申请号：CN201180012121.2
申请日：2011-03-14
申请人：密克罗奇普技术公司
发明人：阿尼鲁达·巴沙尔
IPC分类号： H03K3/3565 , H03F3/45
CPC分类号： H03K3/3565 , H03F3/45699
摘要：一种具有输入级的轨条对轨条比较器追踪所述输入级的Gm(跨导)改变，所述输入级具有独立的正及负差动电压偏移补偿。通过追踪所述输入级的Gm(跨导)改变，所述轨条对轨条比较器的磁滞变得对输入共模电压不敏感。一种两级轨条对轨条比较器可用于将磁滞加到第二级。所述两级轨条对轨条比较器的第一级大体上以单位增益进行操作。所述两级轨条对轨条比较器的所述第二级起具有磁滞的规则高增益放大器的作用。额外电路追踪所述第一级的Gm(跨导)改变，以使所述第二级磁滞对所述第一级处的所述输入共模电压不敏感。这也使得更容易产生一可编程磁滞，所述磁滞对所有输入电压值都是准确的。

3. 发明授权

US07973569B1 Offset calibration and precision hysteresis for a rail-rail comparator with large dynamic range 有权
标题翻译：具有较大动态范围的轨道轨比较器的偏移校准和精度滞后
公开(公告)号：US07973569B1
公开(公告)日：2011-07-05
申请号：US12726117
申请日：2010-03-17
申请人： Aniruddha Bashar
发明人： Aniruddha Bashar
IPC分类号： H03K5/22
CPC分类号： H03K3/3565 , H03F3/45699
摘要： A rail-rail comparator having an input stage with independent positive and negative differential voltage offset compensation tracks changes in Gm (transconductance) of the input stage. By tracking the changes in Gm (transconductance) of the input stage, hysteresis of the rail-rail comparator becomes insensitive to the input common mode voltage. A two-stage rail-rail comparator may be used for adding hysteresis to a second stage. The first stage of the two-stage rail-rail comparator operates at substantially unity gain. The second stage of the two-stage rail-rail comparator operates as a regular high gain amplifier with hysteresis. Additional circuitry tracks the Gm (transconductance) change of the first stage to make the second stage hysteresis insensitive to the input common mode voltage at the first stage. This also makes it easier to create a programmable hysteresis that is accurate over all input voltage values.
摘要翻译：具有独立的正和负差分电压失调补偿的输入级的轨轨式比较器跟踪输入级的Gm（跨导）的变化。通过跟踪输入级Gm（跨导）的变化，轨电比较器的滞后对输入共模电压不敏感。可以使用两级轨道轨比较器来将迟滞增加到第二级。两级铁轨比较的第一阶段基本上是统一的增益。两级轨电比较器的第二级作为具有滞后性的常规高增益放大器。附加电路跟踪第一级的Gm（跨导）变化，使第二级滞后对第一级的输入共模电压不敏感。这也使得更容易创建在所有输入电压值上准确的可编程滞后。

4. 发明申请

US20030206059A1 Operational amplifier circuit 有权
标题翻译：运算放大器电路
公开(公告)号：US20030206059A1
公开(公告)日：2003-11-06
申请号：US10453671
申请日：2003-06-04
申请人： Fujitsu Limited
发明人： Hisao Suzuki
IPC分类号： H03F003/45
CPC分类号： H03F3/45717 , H03F3/3027 , H03F3/4521 , H03F3/45219 , H03F3/45237 , H03F3/45699 , H03F3/45708 , H03F2203/45508
摘要： An operational amplifier circuit includes a first differential pair, which includes first and second transistors, and a second differential pair, which includes third and fourth transistors. A fifth transistor is connected to the first and third transistors. A sixth transistor is connected to the second and fourth transistors. A first current source is connected to the first differential pair to provide a first bias current. A second current source is connected to the second differential pair to provide a second bias current. A third current source is connected to the fifth transistor to provide a third bias current. A fourth current source is connected to the sixth transistor provide a fourth bias current. A control circuit controls the first to fourth current sources such that the sum of the first and second bias currents is constant and the second to fourth bias currents become substantially equal.
摘要翻译：运算放大器电路包括包括第一和第二晶体管的第一差分对和包括第三和第四晶体管的第二差分对。第五晶体管连接到第一和第三晶体管。第六晶体管连接到第二和第四晶体管。第一电流源连接到第一差分对以提供第一偏置电流。第二电流源连接到第二差分对以提供第二偏置电流。第三电流源连接到第五晶体管以提供第三偏置电流。连接到第六晶体管的第四电流源提供第四偏置电流。控制电路控制第一至第四电流源，使得第一和第二偏置电流之和恒定，第二至第四偏置电流变得基本相等。

5. 发明公开

EP2548305A2 OFFSET CALIBRATION AND PRECISION HYSTERESIS FOR A RAIL-RAIL COMPARATOR WITH LARGE DYNAMIC RANGE 有权
标题翻译：偏移校准和PRÄZISIONSHYSTERESE对于大动态范围的轨对轨条比较
公开(公告)号：EP2548305A2
公开(公告)日：2013-01-23
申请号：EP11709606.5
申请日：2011-03-14
申请人： Microchip Technology Incorporated
发明人： BASHAR, Aniruddha
IPC分类号： H03K3/3565 , H03F3/45
CPC分类号： H03K3/3565 , H03F3/45699
摘要： A rail-rail comparator having an input stage with independent positive and negative differential voltage offset compensation tracks changes in Gm (transconductance) of the input stage. By tracking the changes in Gm (transconductance) of the input stage, hysteresis of the rail-rail comparator becomes insensitive to the input common mode voltage. A two-stage rail-rail comparator may be used for adding hysteresis to a second stage. The first stage of the two-stage rail-rail comparator operates at substantially unity gain. The second stage of the two-stage rail-rail comparator operates as a regular high gain amplifier with hysteresis. Additional circuitry tracks the Gm (transconductance) change of the first stage to make the second stage hysteresis insensitive to the input common mode voltage at the first stage. This also makes it easier to create a programmable hysteresis that is accurate over all input voltage values.

6. 发明授权

US09973146B2 Amplifying circuit 有权
公开(公告)号：US09973146B2
公开(公告)日：2018-05-15
申请号：US15657618
申请日：2017-07-24
申请人： SHENZHEN GOODIX TECHNOLOGY CO., LTD.
发明人： Mengwen Zhang
IPC分类号： H03F3/04 , H03F1/02 , H03F1/30 , H03F1/32 , H03F3/187
CPC分类号： H03F1/0205 , H03F1/301 , H03F1/32 , H03F3/005 , H03F3/187 , H03F3/45183 , H03F3/45188 , H03F3/45192 , H03F3/45475 , H03F3/45659 , H03F3/45699 , H03F3/45762 , H03F2200/129 , H03F2200/156 , H03F2200/159 , H03F2200/18 , H03F2200/222 , H03F2200/252 , H03F2200/264 , H03F2200/471 , H03F2200/555 , H03F2203/45008 , H03F2203/45012 , H03F2203/45024 , H03F2203/45028 , H03F2203/45054 , H03F2203/45068 , H03F2203/45082 , H03F2203/45112 , H03F2203/45134 , H03F2203/45136 , H03F2203/45171 , H03F2203/45174 , H03F2203/45182 , H03F2203/45188 , H03F2203/45192 , H03F2203/45208 , H03F2203/45244 , H03F2203/45332 , H03F2203/45421 , H03F2203/45434 , H03F2203/45444 , H03F2203/45512 , H03F2203/45514 , H03F2203/45534 , H03F2203/45544 , H03F2203/45546 , H03F2203/45551 , H03F2203/45586 , H03F2203/45588 , H03F2203/45616 , H03F2203/45632 , H03F2203/45642 , H03F2203/45656 , H03F2203/45674 , H03F2203/45676
摘要： An amplifying circuit includes a reference voltage generating circuit, a common-mode voltage conversion circuit, a common-mode negative feedback circuit, and an amplifying sub-circuit. The reference voltage generating circuit generates a first reference voltage, a second reference voltage, and a reference common-mode voltage according to a post-stage common-mode voltage. The common-mode voltage conversion circuit converts the pre-stage output differential signal into a differential input signal according to the reference common-mode voltage. The common-mode negative feedback circuit generates a control voltage to quickly establish a common-mode negative feedback of the amplifying sub-circuit, wherein the first reference voltage and the second reference voltage are used to cancel a baseline signal of the pre-stage output differential signal. The amplifying circuit can eliminate the baseline signal, convert the common-mode voltage and quickly establish the common-mode negative feedback.

7. 发明申请

US20030206060A1 Operational amplifier circuit 有权
公开(公告)号：US20030206060A1
公开(公告)日：2003-11-06
申请号：US10453812
申请日：2003-06-04
申请人： Fujitsu Limited
发明人： Hisao Suzuki
IPC分类号： H03F003/45
CPC分类号： H03F3/45717 , H03F3/3027 , H03F3/4521 , H03F3/45219 , H03F3/45237 , H03F3/45699 , H03F3/45708 , H03F2203/45508
摘要： An operational amplifier circuit includes a first differential pair, which includes first and second transistors, and a second differential pair, which includes third and fourth transistors. A fifth transistor is connected to the first and third transistors. A sixth transistor is connected to the second and fourth transistors. A first current source is connected to the first differential pair to provide a first bias current. A second current source is connected to the second differential pair to provide a second bias current. A third current source is connected to the fifth transistor to provide a third bias current. A fourth current source is connected to the sixth transistor provide a fourth bias current. A control circuit controls the first to fourth current sources such that the sum of the first and second bias currents is constant and the second to fourth bias currents become substantially equal.

8. 发明授权

US06605993B2 Operational amplifier circuit 有权
公开(公告)号：US06605993B2
公开(公告)日：2003-08-12
申请号：US09769249
申请日：2001-01-26
申请人： Hisao Suzuki
发明人： Hisao Suzuki
IPC分类号： H03F345
CPC分类号： H03F3/45717 , H03F3/3027 , H03F3/4521 , H03F3/45219 , H03F3/45237 , H03F3/45699 , H03F3/45708 , H03F2203/45508
摘要： An operational amplifier circuit includes a first differential pair, which includes first and second transistors, and a second differential pair, which includes third and fourth transistors. A fifth transistor is connected to the first and third transistors. A sixth transistor is connected to the second and fourth transistors. A first current source is connected to the first differential pair to provide a first bias current. A second current source is connected to the second differential pair to provide a second bias current. A third current source is connected to the fifth transistor to provide a third bias current. A fourth current source is connected to the sixth transistor provide a fourth bias current. A control circuit controls the first to fourth current sources such that the sum of the first and second bias currents is constant and the second to fourth bias currents become substantially equal.

9. 发明申请

WO2011115888A3 OFFSET CALIBRATION AND PRECISION HYSTERESIS FOR A RAIL-RAIL COMPARATOR WITH LARGE DYNAMIC RANGE 审中-公开
标题翻译：具有大动力范围的轨道轨道比较器的偏移校准和精度滞后
公开(公告)号：WO2011115888A3
公开(公告)日：2011-11-10
申请号：PCT/US2011028313
申请日：2011-03-14
申请人： MICROCHIP TECH INC , BASHAR ANIRUDDHA
发明人： BASHAR ANIRUDDHA
IPC分类号： H03K3/3565 , H03F3/45
CPC分类号： H03K3/3565 , H03F3/45699
摘要： A rail-rail comparator having an input stage with independent positive and negative differential voltage offset compensation tracks changes in Gm (transconductance) of the input stage. By tracking the changes in Gm (transconductance) of the input stage, hysteresis of the rail-rail comparator becomes insensitive to the input common mode voltage. A two-stage rail-rail comparator may be used for adding hysteresis to a second stage. The first stage of the two-stage rail-rail comparator operates at substantially unity gain. The second stage of the two-stage rail-rail comparator operates as a regular high gain amplifier with hysteresis. Additional circuitry tracks the Gm (transconductance) change of the first stage to make the second stage hysteresis insensitive to the input common mode voltage at the first stage. This also makes it easier to create a programmable hysteresis that is accurate over all input voltage values.
摘要翻译：具有独立的正和负差分电压失调补偿的输入级的轨轨式比较器跟踪输入级的Gm（跨导）的变化。通过跟踪输入级Gm（跨导）的变化，轨电比较器的滞后对输入共模电压不敏感。可以使用两级轨轨式比较器来向第二级增加滞后。两级铁轨比较的第一阶段基本上是统一的增益。两级轨电比较器的第二级作为具有滞后性的常规高增益放大器。附加电路跟踪第一级的Gm（跨导）变化，使第二级滞后对第一级的输入共模电压不敏感。这也使得更容易创建在所有输入电压值上准确的可编程滞后。

10. 发明申请

US20170331432A1 AMPLIFYING CIRCUIT 有权
公开(公告)号：US20170331432A1
公开(公告)日：2017-11-16
申请号：US15657618
申请日：2017-07-24
申请人： SHENZHEN GOODIX TECHNOLOGY CO., LTD.
发明人： Mengwen ZHANG
IPC分类号： H03F1/02 , H03F3/187 , H03F1/30 , H03F1/32
CPC分类号： H03F1/0205 , H03F1/301 , H03F1/32 , H03F3/005 , H03F3/187 , H03F3/45183 , H03F3/45188 , H03F3/45192 , H03F3/45475 , H03F3/45659 , H03F3/45699 , H03F3/45762 , H03F2200/129 , H03F2200/156 , H03F2200/159 , H03F2200/18 , H03F2200/222 , H03F2200/252 , H03F2200/264 , H03F2200/471 , H03F2200/555 , H03F2203/45008 , H03F2203/45012 , H03F2203/45024 , H03F2203/45028 , H03F2203/45054 , H03F2203/45068 , H03F2203/45082 , H03F2203/45112 , H03F2203/45134 , H03F2203/45136 , H03F2203/45171 , H03F2203/45174 , H03F2203/45182 , H03F2203/45188 , H03F2203/45192 , H03F2203/45208 , H03F2203/45244 , H03F2203/45332 , H03F2203/45421 , H03F2203/45434 , H03F2203/45444 , H03F2203/45512 , H03F2203/45514 , H03F2203/45534 , H03F2203/45544 , H03F2203/45546 , H03F2203/45551 , H03F2203/45586 , H03F2203/45588 , H03F2203/45616 , H03F2203/45632 , H03F2203/45642 , H03F2203/45656 , H03F2203/45674 , H03F2203/45676
摘要： An amplifying circuit includes a reference voltage generating circuit, a common-mode voltage conversion circuit, a common-mode negative feedback circuit, and an amplifying sub-circuit. The reference voltage generating circuit generates a first reference voltage, a second reference voltage, and a reference common-mode voltage according to a post-stage common-mode voltage. The common-mode voltage conversion circuit converts the pre-stage output differential signal into a differential input signal according to the reference common-mode voltage. The common-mode negative feedback circuit generates a control voltage to quickly establish a common-mode negative feedback of the amplifying sub-circuit, wherein the first reference voltage and the second reference voltage are used to cancel a baseline signal of the pre-stage output differential signal. The amplifying circuit can eliminate the baseline signal, convert the common-mode voltage and quickly establish the common-mode negative feedback.

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