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71. 发明授权

US10063195B2 Amplifier circuit and amplifier circuit IC chip 有权
公开(公告)号：US10063195B2
公开(公告)日：2018-08-28
申请号：US14428480
申请日：2014-06-17
申请人： ASAHI KASEI MICRODEVICES CORPORATION
发明人： Tomohiko Ogawa , Yoshihiko Koizumi
IPC分类号： G01P15/12 , H03F1/56 , H03F3/45 , G01P3/44 , G01R27/02 , G01P3/487
CPC分类号： H03F1/56 , G01P3/44 , G01P3/487 , G01P15/12 , G01P15/123 , G01R27/02 , H03F3/45071 , H03F3/45475 , H03F3/45932 , H03F2200/261 , H03F2200/294 , H03F2200/504 , H03F2200/555 , H03F2203/45138 , H03F2203/45336 , H03F2203/45528 , H03F2203/45591 , H03F2203/45592
摘要： An amplifier circuit includes a converter configured to convert a predefined physical quantity to a resistance value, and the resistance value converted by the converter is converted to a voltage value and then amplified. The converter includes variable resistance sensors of piezoresistance elements. A bias unit is configured to determine a bias current of the converter, and includes bias resistances. An operation amplifier unit receives, as input signals, output signals from the bias unit and the converter, and includes feedback resistances respectively connected to input and output ends of a first operational amplifier. The first operational amplifier is a whole differential operational amplifier including a common-mode feedback circuit.

72. 发明申请

US20150249434A1 AMPLIFIER CIRCUIT AND AMPLIFIER CIRCUIT IC CHIP 审中-公开
标题翻译：放大器电路和放大器电路IC芯片
公开(公告)号：US20150249434A1
公开(公告)日：2015-09-03
申请号：US14428480
申请日：2014-06-17
申请人： ASAHI KASEI MICRODEVICES CORPORATION
发明人： Tomohiko Ogawa , Yoshihiko Koizumi
IPC分类号： H03F1/56 , G01R27/02 , G01P15/12 , H03F3/45 , G01P3/44
CPC分类号： H03F1/56 , G01P3/44 , G01P3/487 , G01P15/12 , G01P15/123 , G01R27/02 , H03F3/45071 , H03F3/45475 , H03F3/45932 , H03F2200/261 , H03F2200/294 , H03F2200/504 , H03F2200/555 , H03F2203/45138 , H03F2203/45336 , H03F2203/45528 , H03F2203/45591 , H03F2203/45592
摘要： An amplifier circuit includes a converter configured to convert a predefined physical quantity to a resistance value, and the resistance value converted by the converter is converted to a voltage value and then amplified. The converter includes variable resistance sensors of piezoresistance elements. A bias unit is configured to determine a bias current of the converter and includes bias resistances. An operation amplifier unit receives, as input signals, output signals from the bias unit and the converter, and includes feedback resistances respectively connected to input and output ends of a first operational amplifier. The first operational amplifier is a whole differential operational amplifier including a common-mode feedback circuit.
摘要翻译：放大器电路包括被配置为将预定义的物理量转换为电阻值的转换器，并且由转换器转换的电阻值被转换为电压值然后被放大。转换器包括压阻元件的可变电阻传感器。偏置单元被配置为确定转换器的偏置电流并且包括偏置电阻。操作放大器单元接收来自偏置单元和转换器的输出信号作为输入信号，并且包括分别连接到第一运算放大器的输入和输出端的反馈电阻。第一运算放大器是包括共模反馈电路的整体差分运算放大器。

73. 发明申请

US20120046004A1 High performance transmitter preamplification chain with calibration feedback 有权
标题翻译：具有校准反馈的高性能变送器前置放大链
公开(公告)号：US20120046004A1
公开(公告)日：2012-02-23
申请号：US12806799
申请日：2010-08-19
申请人： Ahmad Mirzaei , Hooman Darabi , Amir Hadji-Abdolhamid
发明人： Ahmad Mirzaei , Hooman Darabi , Amir Hadji-Abdolhamid
IPC分类号： H04M1/00 , H03F3/45
CPC分类号： H03F3/45183 , H03F1/0277 , H03F3/189 , H03F3/195 , H03F3/211 , H03F3/245 , H03F3/72 , H03F2200/336 , H03F2200/36 , H03F2200/39 , H03F2200/408 , H03F2200/429 , H03F2200/435 , H03F2200/498 , H03F2200/534 , H03F2200/537 , H03F2200/541 , H03F2203/45394 , H03F2203/45512 , H03F2203/45526 , H03F2203/45528 , H03F2203/45544 , H03F2203/45592 , H03F2203/45594 , H03F2203/45631 , H03F2203/45701 , H03F2203/45702 , H03F2203/45728 , H03G1/0088 , H03G3/3042
摘要： According to one embodiment, an improved preamplification chain for implementation in a transmitter comprises a frequency conversion stage for up-converting a baseband signal to a transmit signal, a variable gain control power amplifier driver for preamplifying the transmit signal, and a differential feedback calibration stage receiving first and second differential outputs of a current steering unit of the power amplifier driver and providing calibration feedback to a baseband signal generator of the transmitter. In one embodiment, the frequency conversion stage includes an adjustable low-pass filter for filtering the baseband signal, a passive mixer for up-converting the baseband signal to the transmit signal, and a clock conversion unit configured to convert a fifty percent (50%) duty cycle clock input to a twenty-five percent (25%) duty cycle clock output for driving the passive mixer.
摘要翻译：根据一个实施例，用于在发射机中实现的改进的前置放大链包括用于将基带信号上变频到发射信号的变频级，用于对发射信号进行预放大的可变增益控制功率放大器驱动器和差分反馈校准级接收功率放大器驱动器的电流转向单元的第一和第二差分输出，并向发射机的基带信号发生器提供校准反馈。在一个实施例中，频率转换级包括用于对基带信号进行滤波的可调低通滤波器，用于将基带信号上变频为发射信号的无源混频器，以及时钟转换单元，被配置为将百分之五十（50％）占空比时钟输入到二十五％（25％）占空比时钟输出，用于驱动无源混频器。

74. 发明申请

US20070257733A1 AMPLIFIER SYSTEM WITH CURRENT-MODE SERVO FEEDBACK 审中-公开
标题翻译：具有电流模式伺服反馈的放大器系统
公开(公告)号：US20070257733A1
公开(公告)日：2007-11-08
申请号：US11778388
申请日：2007-07-16
申请人： William Laletin
发明人： William Laletin
IPC分类号： H03F3/45
CPC分类号： H03F3/45479 , G01R31/3004 , G01R31/31706 , G01R31/31716 , G01R31/386 , H03F1/34 , H03F3/211 , H03F3/45475 , H03F3/45968 , H03F2200/261 , H03F2200/91 , H03F2203/45138 , H03F2203/45212 , H03F2203/45521 , H03F2203/45592
摘要： An amplifier apparatus including differential inputs disposed to receive a first and second input signal, a primary differential amplifier having inverting and non-inverting input nodes receiving the first and second input signal through respective first and second impedance elements and providing a main output signal, feedback circuitry disposed to sample the main output signal and convey complementary current-mode negative feedback signals to the inverting and non-inverting input nodes, wherein the current-mode feedback signals are each servo feedback signals having the same low-pass characteristic, a first controllable circuitry to adjust the input offset voltage of the primary differential amplifier, and a second controllable circuitry to compensate for variations in an input offset voltage and a bias current of the differential amplifier by changes in an operating environment.
摘要翻译：一种放大器装置，包括被设置为接收第一和第二输入信号的差分输入，具有反相和非反相输入节点的初级差分放大器，通过相应的第一和第二阻抗元件接收第一和第二输入信号并提供主输出信号，反馈电路，用于对主输出信号进行采样并将互补电流模式负反馈信号传送到反相和非反相输入节点，其中电流模式反馈信号是具有相同低通特性的伺服反馈信号，第一可控用于调整一次差分放大器的输入偏移电压的电路，以及用于通过操作环境的变化来补偿差分放大器的输入偏移电压和偏置电流的变化的第二可控电路。

75. 发明授权

US07167050B2 Operational amplifier having large output current with low supply voltage 有权
标题翻译：运算放大器，输出电流大，电源电压低
公开(公告)号：US07167050B2
公开(公告)日：2007-01-23
申请号：US10693500
申请日：2003-10-27
申请人： Koji Suzuki
发明人： Koji Suzuki
IPC分类号： H03F3/45
CPC分类号： H03F3/3033 , H03F3/45183 , H03F2203/45564 , H03F2203/45592 , H03F2203/45674
摘要： An operational amplifier including a differential input section generating a first signal as a differential voltage between two input signals; an amplifying section amplifying the first signal into second and third complementary signals; a first MOS transistor between a first supply voltage and an output node, a conduction state of the first MOS transistor controlled responsive to the second signal; a second MOS transistor between a second supply voltage and the output node, a conduction state of the second MOS transistor controlled responsive to the third signal; and a step-up section stepping up the first and second supply voltages to generate a step-up voltage higher than the first and second supply voltages, the amplifying section driven by the step-up voltage so that an absolute value of the maximum level of the second or third signal becomes larger than the absolute value of the first or second supply voltage.
摘要翻译：运算放大器，包括差分输入部分，其产生作为两个输入信号之间的差分电压的第一信号; 放大部分，将第一信号放大为第二和第三互补信号; 在第一电源电压和输出节点之间的第一MOS晶体管，响应于第二信号控制的第一MOS晶体管的导通状态; 在第二电源电压和输出节点之间的第二MOS晶体管，响应于第三信号控制的第二MOS晶体管的导通状态; 以及升压部分升高第一和第二电源电压以产生高于第一和第二电源电压的升压电压，放大部分由升压电压驱动，使得最大电平的绝对值第二或第三信号变得大于第一或第二电源电压的绝对值。

76. 发明授权

US07123082B2 Variable time constant circuit and filter circuit using the same 失效
标题翻译：可变时间常数电路和滤波电路使用相同
公开(公告)号：US07123082B2
公开(公告)日：2006-10-17
申请号：US11258934
申请日：2005-10-27
申请人： Daisuke Kurose , Tetsuro Itakura , Rui Ito
发明人： Daisuke Kurose , Tetsuro Itakura , Rui Ito
IPC分类号： H04B1/10
CPC分类号： H03H11/32 , H03F3/345 , H03F3/45475 , H03F2203/45511 , H03F2203/45512 , H03F2203/45592 , H03F2203/45652 , H03H11/1291 , H03H11/245
摘要： A variable time constant circuit includes an inverting amplifier which has an amplifier input terminal and an amplifier output terminal connected to a signal output terminal and inverts a signal inputted to the amplifier input terminal, a first and a second resistor which are connected in series between the signal input terminal and the amplifier input terminal, a capacitor connected between the amplifier input terminal and the amplifier output terminal, a field effect transistor including a gate terminal connected to a junction point of the first and second resistors, a source terminal kept at a constant potential, and a drain terminal connected to the amplifier input terminal, the transistor flowing a current through the drain terminal according to a voltage between the gate terminal and the source terminal, and a control circuit which controls a voltage-current conversion ratio of the transistor according to a time constant control signal.
摘要翻译：可变时间常数电路包括反相放大器，其具有放大器输入端和连接到信号输出端的放大器输出端，并且反相输入到放大器输入端的信号，第一和第二电阻串联在第信号输入端子和放大器输入端子，连接在放大器输入端子和放大器输出端子之间的电容器，场效应晶体管，其包括连接到第一和第二电阻器的接合点的栅极端子，源极端子保持恒定电位和连接到放大器输入端子的漏极端子，晶体管根据栅极端子和源极端子之间的电压流过漏极端子，以及控制电路，其控制晶体管的电压 - 电流转换比根据时间常数控制信号。

77. 发明申请

US20060125545A1 Analog multiplexing 有权
标题翻译：模拟复用
公开(公告)号：US20060125545A1
公开(公告)日：2006-06-15
申请号：US11350417
申请日：2006-02-09
申请人： Michael Hopkins
发明人： Michael Hopkins
IPC分类号： H03K17/76
CPC分类号： H03F3/45085 , H03F3/211 , H03F3/45475 , H03F3/72 , H03F2200/552 , H03F2200/78 , H03F2203/45138 , H03F2203/45506 , H03F2203/45592 , H03F2203/45616 , H03K17/005
摘要： A multiplexer circuit includes a plurality of switched differential amplifier circuits, one of which can be selected at a time. Each switched differential amplifier includes a pair of differential inputs and a pair of differential outputs, with each pair of differential inputs accepting a corresponding pair of input signals. Each of the switched differential amplifier circuits is configured to present a current mode version of its input signals at its differential outputs when the switched differential amplifier circuit is selected, and to present substantially zero level output signals at its differential outputs when the switched differential amplifier circuit is deselected. The multiplexer circuit also includes a selector that accepts a select signal and selects one of the plurality of switched differential amplifier circuits based on said select signal. A current mirror is used to combine a pair of multiplexer outputs into a single ended output, a version of which is used for feedback.
摘要翻译：多路复用器电路包括多个开关差分放大器电路，其中一个可以一次选择。每个开关差分放大器包括一对差分输入和一对差分输出，每对差分输入接受一对相应的输入信号。每个开关差分放大器电路被配置为当选择开关差分放大器电路时在其差分输出处呈现其输入信号的电流模式版本，并且当开关差分放大器电路在差分输出时呈现基本上为零电平的输出信号被取消选择。复用器电路还包括接收选择信号并基于所述选择信号选择多个开关差分放大器电路之一的选择器。电流镜用于将一对多路复用器输出组合成单端输出，其版本用于反馈。

78. 发明申请

US20060033560A1 Variable time constant circuit and filter circuit using the same 失效
公开(公告)号：US20060033560A1
公开(公告)日：2006-02-16
申请号：US11258934
申请日：2005-10-27
申请人： Daisuke Kurose , Tetsuro Itakura , Rui Ito
发明人： Daisuke Kurose , Tetsuro Itakura , Rui Ito
IPC分类号： H03K5/00
CPC分类号： H03H11/32 , H03F3/345 , H03F3/45475 , H03F2203/45511 , H03F2203/45512 , H03F2203/45592 , H03F2203/45652 , H03H11/1291 , H03H11/245
摘要： A variable time constant circuit includes an inverting amplifier which has an amplifier input terminal and an amplifier output terminal connected to a signal output terminal and inverts a signal inputted to the amplifier input terminal, a first and a second resistor which are connected in series between the signal input terminal and the amplifier input terminal, a capacitor connected between the amplifier input terminal and the amplifier output terminal, a field effect transistor including a gate terminal connected to a junction point of the first and second resistors, a source terminal kept at a constant potential, and a drain terminal connected to the amplifier input terminal, the transistor flowing a current through the drain terminal according to a voltage between the gate terminal and the source terminal, and a control circuit which controls a voltage-current conversion ratio of the transistor according to a time constant control signal.

79. 发明申请

US20050276145A1 Differential input buffer for receiving signals relevant to low power 有权
标题翻译：用于接收与低功率相关的信号的差分输入缓冲器
公开(公告)号：US20050276145A1
公开(公告)日：2005-12-15
申请号：US10865218
申请日：2004-06-10
申请人： Stephen Casper , Scott Van De Graaff
发明人： Stephen Casper , Scott Van De Graaff
IPC分类号： G01R19/165 , G11C7/10 , G11C7/22 , H03F3/45 , H03F3/72 , H03K5/24
CPC分类号： H03K5/2481 , G01R19/16552 , G11C7/1078 , G11C7/1084 , G11C7/22 , G11C7/225 , G11C2207/2227 , H03F3/45179 , H03F3/72 , H03F2203/45592
摘要： Disclosed herein are exemplary embodiments of an improved differential input buffer for signal) and a reference signal, and provides a differential amplifier output representative of a comparison of the magnitude of the input signals. As improved, input buffer circuitry comprises a pull up stage to pull up the voltage of the differential amplifier output slightly higher during an output low condition. The pull up stage is preferably, but not necessarily, activated only during a problematic condition, such as when both input signals to the differential amplifier are low. By pulling up the output, the input buffer circuit enjoys improved margin, and is able to reliably signal a low power condition even when both inputs are low.
摘要翻译：这里公开了用于信号的改进的差分输入缓冲器和参考信号的示例性实施例，并且提供表示输入信号的幅度的比较的差分放大器输出。如改进的，输入缓冲电路包括一个上拉级，以在输出低电平条件下稍微升高差分放大器输出的电压。优选但不一定仅在有问题的状况下激活上拉电平，例如当差分放大器的两个输入信号都较低时。通过提高输出，输入缓冲电路可以提高裕度，即使两个输入都为低电平，也能够可靠地发出低功率状态信号。

80. 发明申请

US20050116773A1 Amplifier system with current-mode servo feedback 有权
标题翻译：具有电流模式伺服反馈的放大器系统
公开(公告)号：US20050116773A1
公开(公告)日：2005-06-02
申请号：US11006350
申请日：2004-12-07
申请人： William Laletin
发明人： William Laletin
IPC分类号： G01R31/36 , H03F3/45
CPC分类号： H03F3/45479 , G01R31/3004 , G01R31/31706 , G01R31/31716 , G01R31/3631 , H03F1/34 , H03F3/211 , H03F3/45475 , H03F3/45968 , H03F2200/261 , H03F2200/91 , H03F2203/45138 , H03F2203/45212 , H03F2203/45521 , H03F2203/45592
摘要： A system and method for compensating an amplifier apparatus for low frequency and/or DC components of an externally applied input signal as well as for any voltage offsets contributed by the amplifier circuitry. Band-limited servo feedback is applied to predetermined nodes in the forward gain path to null out unwanted signal components, leaving a residual signal that, when amplified, will be centered around ground, so that the full dynamic range of the amplifier system may be utilized. Consequently, the signal-to-noise ratio available at the output of the amplifier system will be maximized. The servo compensation may either operate in continuous time, or it may be held constant once a suitable level of compensation has been established, or it may be adjusted from time to time to accommodate slow variations of the average DC component of the input signal.
摘要翻译：一种用于补偿放大器装置的用于外部施加的输入信号的低频和/或DC分量以及由放大器电路贡献的任何电压偏移的系统和方法。频带受限的伺服反馈被施加到正向增益路径中的预定节点以消除不想要的信号分量，留下当放大时将围绕地线居中的残留信号，使得可以利用放大器系统的全部动态范围。因此，在放大器系统的输出处可用的信噪比将被最大化。伺服补偿可以在连续的时间内运行，或者一旦建立了适当的补偿电平，它就可以保持不变，或者可以不时调整伺服补偿以适应输入信号的平均DC分量的缓慢变化。

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