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1. 发明申请

US20060038614A1 Programmable gain instrumentation amplifier with improved gain multiplexers 有权
标题翻译：具有改进增益多路复用器的可编程增益仪表放大器
公开(公告)号：US20060038614A1
公开(公告)日：2006-02-23
申请号：US11205653
申请日：2005-08-17
申请人： Christopher Regier
发明人： Christopher Regier
IPC分类号： H03F3/45
CPC分类号： H03F3/45197 , H03F3/3069 , H03F3/45735 , H03F2200/261 , H03F2203/45356 , H03F2203/45496 , H03G1/0088
摘要： In one embodiment, a programmable gain instrumentation amplifier comprises an input stage configured with a differential precision current conveyor circuit. The current conveyor circuit may be implemented with operational amplifiers coupled to gain-setting resistors, with double-multiplexers configured on each end of the gain-setting resistors. In a first set of embodiments, the double-multiplexers may be bootstrapped, whereby the power supplies of each double-multiplexer may track the signals on the output pin of a respective sense-multiplexer component of the double-multiplexer. In a second set of embodiments, the power supplies may alternatively track the op-amp differential output during non-overload conditions, or the op-amp common-mode output at a gain resistor center tap during overload conditions. Corresponding bootstrap circuits may be designed for both sets of embodiments, the bootstrap circuits coupling to the respective tracking node or nodes in either case.
摘要翻译：在一个实施例中，可编程增益仪表放大器包括配置有差分精密电流输送电路的输入级。目前的输送机电路可以与耦合到增益设置电阻器的运算放大器一起实现，双倍多路复用器配置在增益设置电阻器的每一端。在第一组实施例中，双重复用器可以是自举的，由此每个双重复用器的电源可以跟踪双复用器的相应读取复用器组件的输出引脚上的信号。在第二组实施例中，电源可替代地在过载条件下跟踪运算放大器差分输出，或者在过载条件下在增益电阻器中心抽头处的运算放大器共模输出。可以为两组实施例设计相应的引导电路，在任一情况下，引导电路耦合到相应的跟踪节点或节点。

2. 发明授权

US07532068B2 Differential amplifier circuit 有权
标题翻译：差分放大电路
公开(公告)号：US07532068B2
公开(公告)日：2009-05-12
申请号：US11946760
申请日：2007-11-28
申请人： Shinji Kurihara
发明人： Shinji Kurihara
IPC分类号： H03F3/45
CPC分类号： H03F3/45192 , H03F3/45735 , H03F2203/45122 , H03F2203/45302
摘要： A differential amplifier circuit includes a first transistor in which an electrode on one side is connected to a first constant current source, an electrode on the other side is connected to a second constant current source, and the control electrode is applied with a first input voltage; a second transistor in which an electrode on one side is connected to the first constant current source, an electrode on the other side is connected to a third constant current source, and the control electrode is applied with a second input voltage; and a third transistor in which an electrode on one side is connected to the electrode on the other side of the first or second transistor, the third transistor outputting to an electrode on the other side thereof a current corresponding to a difference between the first and second input voltages.
摘要翻译：差分放大电路包括第一晶体管，其中一侧的电极连接到第一恒流源，另一侧的电极连接到第二恒流源，并且控制电极施加第一输入电压 ; 第一晶体管，其一侧的电极与第一恒流源连接，另一侧的电极与第三恒流源连接，控制电极施加第二输入电压; 以及第三晶体管，其中一侧的电极连接到所述第一或第二晶体管的另一侧上的所述电极，所述第三晶体管的另一侧向电极输出与所述第一和第二晶体管的另一侧的电位相对应的电流，输入电压。

3. 发明授权

US3454894A Stabilization of drain-electrode current of insulated-gate field-effect transistor 失效
标题翻译：绝缘栅场效应晶体管漏极电流稳定性
公开(公告)号：US3454894A
公开(公告)日：1969-07-08
申请号：US3454894D
申请日：1965-11-24
申请人： LEEDS & NORTHRUP CO
发明人： VOORHOEVE ERNST W
IPC分类号： H01L27/02 , H03F3/45 , H03F3/68 , H03F3/14
CPC分类号： H03F3/4508 , H01L27/0218 , H03F3/45183 , H03F3/45735 , H03F2203/45214 , H03F2203/45342 , H03F2203/45496

4. 发明申请

WO1997037428A2 RAIL-TO-RAIL INPUT STAGES WITH CONSTANT gm AND CONSTANT COMMON-MODE OUTPUT CURRENTS 审中-公开
标题翻译： RAIL-to-RAIL输入级具有恒定的和恒定的共模输出电流
公开(公告)号：WO1997037428A2
公开(公告)日：1997-10-09
申请号：PCT/IB1997000196
申请日：1997-03-04
申请人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB
发明人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB , HUIJSING, Johan, Hendrik , HOGERVORST, Ronald
IPC分类号： H03F03/45
CPC分类号： H03F3/45887 , H03F3/45121 , H03F3/45219 , H03F3/45318 , H03F3/45587 , H03F3/45735 , H03F2203/45304 , H03F2203/45711
摘要： A rail-to-rail input stage with constant transconductance and constant common-mode output currents is provided. The common-mode output currents are controlled by the use of current switches (M5-M8). When low and high common-mode input voltages are applied to the input stage, the current switches (M5-M8) take part of the tail currents of the input stage transistors (M1-M4), divide it into two equal parts, and direct the two equal current signals to the outputs. When intermediate common-mode input voltages are applied, the current switches (M5-M8) regulate the tail currents of the input pairs such that the common-mode output current and the transconductance remain constant. The current switches (M5-M8) are responsive to changes in the common-mode input voltages, and thereby maintain the transconductance constant.
摘要翻译：提供了具有恒定跨导和恒定共模输出电流的轨到轨输入级。共模输出电流由使用电流开关（M5-M8）控制。当低电平和高共模输入电压施加到输入级时，电流开关（M5-M8）将部分输入级晶体管（M1-M4）的尾电流分成两部分，并直接两个相等的电流信号输出到输出端。当施加中间共模输入电压时，电流开关（M5-M8）调节输入对的尾部电流，使得共模输出电流和跨导保持不变。电流开关（M5-M8）响应共模输入电压的变化，从而保持跨导常数。

5. 发明申请

WO9737428A3 RAIL-TO-RAIL INPUT STAGES WITH CONSTANT GM AND CONSTANT COMMON-MODE OUTPUT CURRENTS 审中-公开
标题翻译：具有恒定通用和恒定通用输出电流的轨至轨输入级
公开(公告)号：WO9737428A3
公开(公告)日：1997-11-27
申请号：PCT/IB9700196
申请日：1997-03-04
申请人： PHILIPS ELECTRONICS NV , PHILIPS NORDEN AB
发明人： HUIJSING JOHAN HENDRIK , HOGERVORST RONALD
IPC分类号： H03F3/45
CPC分类号： H03F3/45887 , H03F3/45121 , H03F3/45219 , H03F3/45318 , H03F3/45587 , H03F3/45735 , H03F2203/45304 , H03F2203/45711
摘要： A rail-to-rail input stage with constant transconductance and constant common-mode output currents is provided. The common-mode output currents are controlled by the use of current switches (M5-M8). When low and high common-mode input voltages are applied to the input stage, the current switches (M5-M8) take part of the tail currents of the input stage transistors (M1-M4), divide it into two equal parts, and direct the two equal current signals to the outputs. When intermediate common-mode input voltages are applied, the current switches (M5-M8) regulate the tail currents of the input pairs such that the common-mode output current and the transconductance remain constant. The current switches (M5-M8) are responsive to changes in the common-mode input voltages, and thereby maintain the transconductance constant.

6. 发明授权

EP0829132B1 RAIL-TO-RAIL INPUT STAGES WITH CONSTANT gm AND CONSTANT COMMON-MODE OUTPUT CURRENTS 失效
标题翻译：与CONSTANT共模输出STREAMS在整个电源电压范围恒定跨输入电平
公开(公告)号：EP0829132B1
公开(公告)日：2001-10-31
申请号：EP97903530.0
申请日：1997-03-04
申请人： Koninklijke Philips Electronics N.V.
发明人： HUIJSING, Johan, Hendrik , HOGERVORST, Ronald
IPC分类号： H03F3/45
CPC分类号： H03F3/45887 , H03F3/45121 , H03F3/45219 , H03F3/45318 , H03F3/45587 , H03F3/45735 , H03F2203/45304 , H03F2203/45711
摘要： A rail-to-rail input stage with constant transconductance and constant common-mode output currents is provided. The common-mode output currents are controlled by the use of current switches (M5-M8). When low and high common-mode input voltages are applied to the input stage, the current switches (M5-M8) take part of the tail currents of the input stage transistors (M1-M4), divide it into two equal parts, and direct the two equal current signals to the outputs. When intermediate common-mode input voltages are applied, the current switches (M5-M8) regulate the tail currents of the input pairs such that the common-mode output current and the transconductance remain constant. The current switches (M5-M8) are responsive to changes in the common-mode input voltages, and thereby maintain the transconductance constant.

7. 发明公开

EP0829132A2 RAIL-TO-RAIL INPUT STAGES WITH CONSTANT gm AND CONSTANT COMMON-MODE OUTPUT CURRENTS 失效
标题翻译：与CONSTANT共模输出STREAMS在整个电源电压范围恒定跨输入电平
公开(公告)号：EP0829132A2
公开(公告)日：1998-03-18
申请号：EP97903530.0
申请日：1997-03-04
申请人： Philips Electronics N.V.
发明人： HUIJSING, Johan, Hendrik , HOGERVORST, Ronald
IPC分类号： H03F3
CPC分类号： H03F3/45887 , H03F3/45121 , H03F3/45219 , H03F3/45318 , H03F3/45587 , H03F3/45735 , H03F2203/45304 , H03F2203/45711
摘要： A rail-to-rail input stage with constant transconductance and constant common-mode output currents is provided. The common-mode output currents are controlled by the use of current switches (M5-M8). When low and high common-mode input voltages are applied to the input stage, the current switches (M5-M8) take part of the tail currents of the input stage transistors (M1-M4), divide it into two equal parts, and direct the two equal current signals to the outputs. When intermediate common-mode input voltages are applied, the current switches (M5-M8) regulate the tail currents of the input pairs such that the common-mode output current and the transconductance remain constant. The current switches (M5-M8) are responsive to changes in the common-mode input voltages, and thereby maintain the transconductance constant.

8. 发明授权

US07868810B2 Amplifier circuit and A/D converter 有权
标题翻译：放大器电路和A / D转换器
公开(公告)号：US07868810B2
公开(公告)日：2011-01-11
申请号：US12547973
申请日：2009-08-26
申请人： Mai Nozawa , Masanori Furuta
发明人： Mai Nozawa , Masanori Furuta
IPC分类号： H03M1/38
CPC分类号： H03F1/223 , H03F3/45183 , H03F3/45192 , H03F3/45475 , H03F3/45735 , H03F2200/249 , H03F2200/405 , H03F2200/414 , H03F2200/78 , H03F2203/45292 , H03F2203/45302 , H03F2203/45356 , H03F2203/45396 , H03F2203/45424 , H03F2203/45446 , H03F2203/45536 , H03F2203/45544 , H03F2203/45551 , H03F2203/45616 , H03F2203/45726 , H03F2203/45728 , H03M1/002 , H03M1/0682 , H03M1/164
摘要： An amplifier circuit includes a current source that is connected between a power supply voltage and an output node and that is turned on when a switching control signal takes a first value and is turned off when the switching control signal takes a second value; a grounded voltage control current source whose amount of current is controlled by an input voltage; a cascode transistor connected between the voltage control current source and the output node; a boost amplifier connected between a gate electrode and a source electrode of the cascode transistor; and a switch that is connected between an output node of the boost amplifier and a bias voltage and that is turned on for a predetermined period of time when a value of the switching control signal is switched from the second value to the first value, to forcefully rise the boost amplifier.
摘要翻译：放大器电路包括连接在电源电压和输出节点之间的电流源，并且当开关控制信号取第一值时导通，并且当开关控制信号取第二值时被关断; 接地电压控制电流源，其电流量由输入电压控制; 连接在电压控制电流源和输出节点之间的共源共栅晶体管; 连接在共栅二极管的栅电极和源电极之间的升压放大器; 以及开关，其连接在所述升压放大器的输出节点和偏置电压之间，并且当所述开关控制信号的值从所述第二值切换到所述第一值时，所述开关被接通预定时间段，以强制地升高放大器。

9. 发明授权

US07538613B2 Systems and methods for common mode detection 有权
标题翻译：用于共模检测的系统和方法
公开(公告)号：US07538613B2
公开(公告)日：2009-05-26
申请号：US11365143
申请日：2006-02-28
申请人： Sumantra Seth , Kanan Saurabh
发明人： Sumantra Seth , Kanan Saurabh
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , H03F3/45735 , H03F3/45739 , H03F2200/453 , H03F2200/513
摘要： Various systems and methods for common mode detection are disclosed. As one example, a common mode detection circuit including a differential input stage, a common mode replica stage, and an amplifier is disclosed. The differential input stage exhibits an input common mode, and includes two differential inputs. A signal from the differential input stage representing the input common mode is electrically coupled to an input of the amplifier. Another input of the amplifier is electrically coupled to the common mode replica stage, and the amplifier outputs a signal indicative of the input common mode.
摘要翻译：公开了用于共模检测的各种系统和方法。作为一个示例，公开了包括差分输入级，共模复制级和放大器的共模检测电路。差分输入级呈现输入共模，并包括两个差分输入。来自差分输入级的表示输入共模的信号电耦合到放大器的输入。放大器的另一个输入电耦合到共模复制级，放大器输出表示输入共模的信号。

10. 发明授权

US6084465A Method for time constant tuning of gm-C filters 失效
标题翻译： gm-C滤波器的时间常数调谐方法
公开(公告)号：US6084465A
公开(公告)日：2000-07-04
申请号：US072341
申请日：1998-05-04
申请人： Uday Dasgupta
发明人： Uday Dasgupta
IPC分类号： H03F3/45 , H03F3/72 , H03K5/00
CPC分类号： H03F3/45735 , H03F3/45188 , H03F3/72 , H03H11/0472 , H03F2203/45356 , H03F2203/45674 , H03F2203/7203
摘要： In this invention a time constant tuning circuit is described in which a reference clock frequency is used to adjust the gm of a transconductor and as a result the time constant of the circuit. This is done by charging a capacitor to a voltage with the current output of a transconductor during a clock period and comparing the voltage charge with another voltage. The error voltage from the comparison is used to control the gm of the transconductor. Changing the clock period changes the gm required to charge the capacitor to a voltage to satisfy the comparison. Thus the filter time constants are directly proportional to the reference clock; and therefore, are independent of process variations. The time constants can be varied by varying the clock frequency and is achieved without the use of a PLL. The output the time constant tuning circuit can be used to tune the time constants of other gm-c filters using similar transconductors and capacitors.
摘要翻译：在本发明中，描述了一种时间常数调谐电路，其中使用参考时钟频率来调节跨导体的gm，结果是电路的时间常数。这通过在时钟周期内将电容器充电到具有跨导体的电流输出的电压来进行，并将电压电荷与另一电压进行比较。来自比较的误差电压用于控制跨导体的gm。改变时钟周期将将电容器充电到电压以满足比较所需的gm。因此，滤波器时间常数与参考时钟成正比; 因此，与工艺变化无关。时间常数可以通过改变时钟频率来改变，并且在不使用PLL的情况下实现。时间常数调谐电路的输出可用于使用类似的跨导体和电容器来调谐其他gm-c滤波器的时间常数。

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