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61. 发明授权

US09065400B2 Programmable-gain instrumentation amplifier 有权
标题翻译：可编程增益仪表放大器
公开(公告)号：US09065400B2
公开(公告)日：2015-06-23
申请号：US14033113
申请日：2013-09-20
申请人： Honeywell International Inc.
发明人： Mark R. Larson
IPC分类号： H03F1/36 , H03F3/45 , H03G3/30 , H03G1/00
CPC分类号： H03F3/45071 , H03F3/45475 , H03F2200/252 , H03F2200/261 , H03F2200/447 , H03F2203/45522 , H03F2203/45528 , H03F2203/45534 , H03F2203/45536 , H03F2203/45591 , H03F2203/45594 , H03F2203/45604 , H03F2203/45616 , H03F2203/45618 , H03G1/0088 , H03G3/3026
摘要： A device comprises a first amplifier, a first resistive element that comprises a first resistor and a first dummy switch, a second amplifier, a second resistive element that comprises a second resistor and a second dummy switch, and a programmable resistive gain element operable to receive control input, wherein a resistance value of the programmable resistive gain element is based at least in part on the received control input, wherein a first end of the programmable resistive gain element is connected to both the first inverting input of the first amplifier and to a second end of the first dummy switch, and wherein a second end of the programmable resistive gain element is connected to both the second inverting input of the second amplifier and to a second end of the second dummy switch.
摘要翻译：一种装置包括第一放大器，包括第一电阻器和第一虚拟开关的第一电阻元件，第二放大器，包括第二电阻器和第二虚拟开关的第二电阻元件以及可操作以接收的可编程电阻增益元件控制输入，其中所述可编程电阻增益元件的电阻值至少部分地基于所接收的控制输入，其中所述可编程电阻增益元件的第一端连接到所述第一放大器的第一反相输入端，第二虚拟开关的第二端，并且其中可编程电阻增益元件的第二端连接到第二放大器的第二反相输入端和第二虚拟开关的第二端。

62. 发明授权

US08975963B2 Offset reduction for analog front-ends 有权
标题翻译：模拟前端的偏移减少
公开(公告)号：US08975963B2
公开(公告)日：2015-03-10
申请号：US13835264
申请日：2013-03-15
申请人： Texas Instruments Incorporated
发明人： Ajit Sharma , Kemal S. Demirci
IPC分类号： H03F3/45
CPC分类号： H03F3/45076 , H03F3/45475 , H03F3/45973 , H03F2203/45138 , H03F2203/45212 , H03F2203/45522 , H03F2203/45526
摘要： A circuit includes a first amplifier configured to amplify an input signal to generate an output signal. An offset sensor is configured to sense DC offset based on the output signal, where the offset sensor includes a second amplifier configured to generate an offset reduction signal for the first amplifier based on the sensed DC offset. A T-network in the circuit includes at least three resistors coupled to provide a feedback connection between the input signal and the output signal for the first amplifier and to receive the offset reduction signal to mitigate DC offset in the first amplifier. Since this method reduces the low-frequency component of the signal, it also shapes and reduces the flicker noise.
摘要翻译：电路包括被配置为放大输入信号以产生输出信号的第一放大器。偏移传感器被配置为基于输出信号感测DC偏移，其中偏移传感器包括被配置为基于感测的DC偏移产生用于第一放大器的偏移减小信号的第二放大器。电路中的T网络包括至少三个电阻器，其被耦合以在第一放大器的输入信号和输出信号之间提供反馈连接，并且接收偏移降低信号以减轻第一放大器中的DC偏移。由于该方法降低了信号的低频分量，因此也可以形成和减少闪烁噪声。

63. 发明申请

US20150061764A1 ANALOG AMPLIFIER FOR RECOVERING ABNORMAL OPERATION OF COMMON MODE FEEDBACK 有权
标题翻译：用于恢复通用模式反馈异常运行的模拟放大器
公开(公告)号：US20150061764A1
公开(公告)日：2015-03-05
申请号：US14016704
申请日：2013-09-03
申请人： Samsung Electronics Co. Ltd.
发明人： Jong-Woo LEE , Thomas Byung-Hak CHO , Jae-Hyun LIM
IPC分类号： H03F3/45
CPC分类号： H03F3/183 , H03F3/45183 , H03F3/45475 , H03F3/45636 , H03F2200/21 , H03F2200/555 , H03F2203/45522 , H03F2203/45528 , H03F2203/45591 , H03F2203/45594 , H03F2203/45686 , H03F2203/45702 , H03G3/3005
摘要： An analog amplifier for recovering an abnormal operation of a common-mode feedback is provided. An analog variable amplifier includes a first input transistor and a second input transistor, a first output transistor and a second output transistor, a third transistor and a fourth transistor, a first current source, a fifth transistor and a sixth transistor, and a second current source. The first input transistor and the second input transistor amplify a bias current depending on a magnitude of a first input voltage and a second input voltage. The first output transistor and the second output transistor output the amplified bias current. The third transistor and the fourth transistor receive an output voltage of the first output transistor as an input and amplifying the received output voltage. The first current source provides a predetermined current between the first output transistor and the third transistor.
摘要翻译：提供了用于恢复共模反馈的异常操作的模拟放大器。模拟可变放大器包括第一输入晶体管和第二输入晶体管，第一输出晶体管和第二输出晶体管，第三晶体管和第四晶体管，第一电流源，第五晶体管和第六晶体管，以及第二电流资源。第一输入晶体管和第二输入晶体管根据第一输入电压和第二输入电压的幅度来放大偏置电流。第一输出晶体管和第二输出晶体管输出放大的偏置电流。第三晶体管和第四晶体管接收第一输出晶体管的输出电压作为输入并放大接收的输出电压。第一电流源在第一输出晶体管和第三晶体管之间提供预定电流。

64. 发明授权

US08854126B2 Semiconductor device and offset voltage correcting method 有权
标题翻译：半导体器件和偏移电压校正方法
公开(公告)号：US08854126B2
公开(公告)日：2014-10-07
申请号：US14104776
申请日：2013-12-12
申请人： Renesas Electronics Corporation
发明人： Junichi Ishigami , Yasuhiro Koga
IPC分类号： H03F3/45
CPC分类号： H03F1/0261 , H03F3/45475 , H03F3/45744 , H03F3/68 , H03F2200/261 , H03F2200/468 , H03F2203/45212 , H03F2203/45522 , H03F2203/45528 , H03F2203/45591 , H03F2203/45594 , H03F2203/45596 , H03F2203/45616
摘要： A semiconductor device includes: an amplifier circuit that has an inverting input terminal, a non-inverting input terminal, and an output terminal; a first variable voltage source that generates a first bias voltage having a voltage value corresponding to a first set value; a second variable voltage source that generates a second bias voltage having a voltage value corresponding to a second set value; a first resistor whose one end is connected to the inverting input terminal; a second resistor that is connected between the output terminal and the inverting input terminal; a third resistor whose one end is connected to the non-inverting input terminal; and a fourth resistor that is connected between the second variable voltage source and the non-inverting input terminal. The first bias voltage is provided to the other end of the first resistor. An input signal is provided to the other end of the third resistor.
摘要翻译：一种半导体器件包括：具有反相输入端子，非反相输入端子和输出端子的放大器电路; 第一可变电压源，其产生具有对应于第一设定值的电压值的第一偏置电压; 产生具有对应于第二设定值的电压值的第二偏置电压的第二可变电压源; 第一电阻器，其一端连接到反相输入端子; 连接在输出端子和反相输入端子之间的第二电阻器; 一端连接到非反相输入端的第三电阻; 以及连接在第二可变电压源和非反相输入端子之间的第四电阻器。第一偏置电压被提供给第一电阻器的另一端。输入信号被提供给第三电阻器的另一端。

65. 发明授权

US08489030B2 Radio apparatus having first and second amplifiers and which performs direct current offset correction of the first and second amplifiers 有权
标题翻译：具有第一和第二放大器并且执行第一和第二放大器的直流偏移校正的无线电设备
公开(公告)号：US08489030B2
公开(公告)日：2013-07-16
申请号：US13052371
申请日：2011-03-21
申请人： Fumi Moritsuka , Shoji Otaka , Masahiro Hosoya , Hiroaki Ishihara , Tsuyoshi Kogawa
发明人： Fumi Moritsuka , Shoji Otaka , Masahiro Hosoya , Hiroaki Ishihara , Tsuyoshi Kogawa
IPC分类号： H04B1/00
CPC分类号： H03G3/3052 , H03F3/195 , H03F3/45475 , H03F3/45977 , H03F2200/321 , H03F2200/451 , H03F2203/45138 , H03F2203/45424 , H03F2203/45438 , H03F2203/45446 , H03F2203/45522
摘要： A radio apparatus capable of correcting a direct current offset with high accuracy in a short time is provided. A radio apparatus according to an embodiment includes a first amplifier amplifying a signal inputted to an input terminal with amplification gain determined by a variable resistor to generate a first amplified signal, and a second amplifier amplifying the first amplified signal to generate a second amplified signal. Further, the radio apparatus includes a first correcting unit correcting a direct current offset of the first amplifier, and a second correcting unit correcting a direct current offset of the second amplifier. The radio apparatus also includes a reference voltage source or reference current source supplying a reference voltage or reference current for referring a direct current offset to the first amplifier and the second amplifier, a gain controller controlling the amplification gain of the first amplifier; and a correction controller controlling the gain controller to set the amplification gain to maximum and controlling the first and second correcting units to perform correction of the second correcting unit based on the second amplified signal obtained by inputting the reference voltage or the reference current to an input terminal of the second amplifier, and thereafter perform correction of the first correcting unit based on the second amplified signal obtained by inputting the reference voltage or the reference current to an input terminal of the first amplifier.
摘要翻译：提供能够在短时间内以高精度校正直流偏移的无线电装置。根据实施例的无线电设备包括：放大输入到输入端的信号的第一放大器，其具有由可变电阻器确定的放大增益以产生第一放大信号;以及第二放大器，放大第一放大信号以产生第二放大信号。此外，无线电设备包括校正第一放大器的直流偏移的第一校正单元和校正第二放大器的直流偏移的第二校正单元。无线电设备还包括参考电压源或参考电流源，其提供用于将直流偏移引用到第一放大器和第二放大器的参考电压或参考电流，控制第一放大器的放大增益的增益控制器; 以及校正控制器，控制增益控制器将放大增益设定为最大，并且基于通过将参考电压或参考电流输入到输入端获得的第二放大信号来控制第一和第二校正单元执行第二校正单元的校正终端，然后基于通过将参考电压或参考电流输入到第一放大器的输入端而获得的第二放大信号来执行第一校正单元的校正。

66. 发明申请

US20130137388A1 SEMICONDUCTOR INTEGRATED CIRCUIT AND RADIO RECEIVER 失效
标题翻译：半导体集成电路和无线电接收器
公开(公告)号：US20130137388A1
公开(公告)日：2013-05-30
申请号：US13423472
申请日：2012-03-19
申请人： Daisuke Miyashita
发明人： Daisuke Miyashita
IPC分类号： H04B1/06 , H03F3/45
CPC分类号： H03F3/195 , H03F3/45475 , H03F3/45977 , H03F3/45986 , H03F2200/294 , H03F2203/45212 , H03F2203/45522 , H03F2203/45591 , H03G3/3073 , H03G3/3078
摘要： The first control circuit controls the gain of the variable gain amplifier circuit and the cut-off frequency of the first low-pass filter so as to keep constant a product of a transfer function of the variable gain amplifier circuit and a transfer function of the first low-pass filter. The second control circuit compares a level of the second feedback signal and a preset threshold value after completion of gain control of the variable gain amplifier circuit, the second control circuit inputting the signal outputted from the first low-pass filter, as the first feedback signal to the first terminal as long as the level of the second feedback signal is not lower than the threshold value, the second control circuit inputting the signal outputted from the second low-pass filter, as the first feedback signal to the first terminal.
摘要翻译：第一控制电路控制可变增益放大器电路的增益和第一低通滤波器的截止频率，以保持恒定的可变增益放大器电路的传递函数和第一低通滤波器的传递函数的乘积低通滤波器。第二控制电路将可变增益放大器电路的增益控制完成后的第二反馈信号的电平与预设的阈值进行比较，第二控制电路输入从第一低通滤波器输出的信号作为第一反馈信号只要第二反馈信号的电平不低于阈值，第二控制电路将从第二低通滤波器输出的信号作为第一反馈信号输入到第一端子。

67. 发明申请

US20130064394A1 DIGITAL SIGNAL GENERATOR AND DIGITAL MICROPHONE 审中-公开
标题翻译：数字信号发生器和数字麦克风
公开(公告)号：US20130064394A1
公开(公告)日：2013-03-14
申请号：US13398103
申请日：2012-02-16
申请人： Teruo IMAYAMA
发明人： Teruo IMAYAMA
IPC分类号： H03G3/00 , H03F99/00 , H03M1/06
CPC分类号： H03F3/187 , H03F2200/468 , H03F2203/45136 , H03F2203/45522 , H04R3/00
摘要： According to one embodiment, a digital signal generator includes an amplifying unit, a reference voltage generator and a modulator. The amplifying unit amplifies an analog input signal having a signal level linearly depending on a temperature. The reference voltage generator generates a reference voltage linearly depending on the temperature. The modulator converts the analog input signal amplified by the amplifying unit into a digital output signal based on the reference voltage.
摘要翻译：根据一个实施例，数字信号发生器包括放大单元，参考电压发生器和调制器。放大单元根据温度线性地放大具有信号电平的模拟输入信号。参考电压发生器根据温度线性地产生参考电压。调制器将由放大单元放大的模拟输入信号转换成基于参考电压的数字输出信号。

68. 发明申请

US20120326696A1 VARIABLE VOLTAGE GENERATION CIRCUIT 有权
标题翻译：可变电压发生电路
公开(公告)号：US20120326696A1
公开(公告)日：2012-12-27
申请号：US13482996
申请日：2012-05-29
申请人： Yen-An Chang
发明人： Yen-An Chang
IPC分类号： G05F3/08
CPC分类号： G05F1/575 , H03F3/45475 , H03F2203/45522 , H03F2203/45528 , H03F2203/45534
摘要： A variable voltage generation circuit includes an amplifier, a P-type metal-oxide-semiconductor transistor, at least one variable resistor, and a lower resistor. Each variable resistor includes M resistors and M switches. An ith switch of the M switches has a first terminal coupled to a first terminal of the variable resistor, and a second terminal. An ith resistor has a first terminal coupled to the second terminal of the ith switch, and a second terminal coupled to a first terminal of an (i+1)th resistor, where 2≦M, 1≦i≦M, and i and M are natural numbers. Therefore, the variable voltage generation circuit outputs at least one variable voltage according to a reference voltage, the at least one variable resistor, and the lower resistor.
摘要翻译：可变电压产生电路包括放大器，P型金属氧化物半导体晶体管，至少一个可变电阻器和下电阻器。每个可变电阻器包括M个电阻和M个开关。 M开关的第i个开关具有耦合到可变电阻器的第一端子的第一端子和第二端子。第i个电阻器具有耦合到第i个开关的第二端子的第一端子和耦合到第（i + 1）个电阻器的第一端子的第二端子，其中2＆nlE; M，1＆nlE; i＆nlE; M，i和 M是自然数。因此，可变电压产生电路根据参考电压输出至少一个可变电压，至少一个可变电阻器和下电阻器。

69. 发明申请

US20120293353A1 OPERATIONAL AMPLIFIER 有权
标题翻译：操作放大器
公开(公告)号：US20120293353A1
公开(公告)日：2012-11-22
申请号：US13468126
申请日：2012-05-10
申请人： Atsushi OKUMURA , Ryusuke Sahara , Mitsugi Kusunoki
发明人： Atsushi OKUMURA , Ryusuke Sahara , Mitsugi Kusunoki
IPC分类号： H03M1/66 , H03F1/34
CPC分类号： H03F3/45475 , H03F3/45928 , H03F2200/447 , H03F2203/45522 , H03F2203/45528 , H03F2203/45534 , H03F2203/45591 , H03F2203/45594 , H03F2203/45616
摘要： A temperature dependence adjustable operational amplifier circuit which suppresses a change in a gain caused by a change in an input voltage is provided. In an operational amplifier including a first input terminal and an output terminal, an operational amplifier having an inverting input terminal and a non-inverting input terminal, an input resistance circuit, and a feedback resistance circuit, each of the input and feedback resistor circuits has a resistor and a trimming resistor, which are different in temperature coefficient from each other, connected in series with each other, and a source-drain path of a MOS transistor included in the trimming resistor circuit is disposed between resistance and an inverting input terminal, and a substrate potential thereof is set to a potential of the inverting input terminal of the operational amplifier.
摘要翻译：提供了抑制由输入电压变化引起的增益变化的温度依赖性可调运算放大器电路。在包括第一输入端子和输出端子的运算放大器中，具有反相输入端子和非反相输入端子的运算放大器，输入电阻电路和反馈电阻电路，每个输入和反馈电阻电路具有电阻和微调电阻彼此串联连接的温度系数彼此不同，并且包括在微调电阻电路中的MOS晶体管的源极 - 漏极路径被设置在电阻和反相输入端之间，并且其衬底电位被设置为运算放大器的反相输入端的电位。

70. 发明申请

US20120262230A1 AMPLIFIER CROSSTALK CANCELLATION TECHNIQUE 有权
公开(公告)号：US20120262230A1
公开(公告)日：2012-10-18
申请号：US13272021
申请日：2011-10-12
申请人： William D. Llewellyn , Carmine Cozzolino
发明人： William D. Llewellyn , Carmine Cozzolino
IPC分类号： H03F1/00 , H03F3/68
CPC分类号： H03F3/45475 , H03F3/187 , H03F3/68 , H03F2203/45522 , H03F2203/45591 , H04R5/04
摘要： This document discusses apparatus and methods for configuring and providing crosstalk cancellation to maintain channel separation in a multi channel system. In an example, an amplifier circuit can include a crosstalk cancellation circuit configured to reduce crosstalk from a first output to a second load and from a second output to a first load where the first load and the second load share a return path.
摘要翻译：本文讨论了用于配置和提供串扰消除以维持多信道系统中的信道分离的装置和方法。在一个示例中，放大器电路可以包括串扰消除电路，其被配置为减少从第一输出到第二负载的串扰，以及从第二输出到第一负载的第一负载，其中第一负载和第二负载共享返回路径。

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