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1. 发明申请

US20180316324A1 OFFSET TRIMMING FOR DIFFERENTIAL AMPLIFIER 审中-公开
公开(公告)号：US20180316324A1
公开(公告)日：2018-11-01
申请号：US15497232
申请日：2017-04-26
申请人： SanDisk Technologies, Inc.
发明人： DEEP SAXENA , SAURABH SINGH
IPC分类号： H03F3/45 , H03F3/347
CPC分类号： H03F3/45179 , H03F3/347 , H03F3/45085 , H03F3/45112 , H03F3/45183 , H03F3/45376 , H03F3/45596
摘要： Apparatuses, systems, and methods are disclosed for offset trimming for differential amplifiers. An apparatus includes a differential amplifier. A differential amplifier includes a non-inverting input, an inverting input, and an output coupled to the inverting input via a voltage divider. A first variable current source is coupled to a non-inverting input, so that increasing a current from the first variable current source increases a voltage at the non-inverting input. A second variable current source is coupled to an inverting input, and to an output via a voltage divider, so that increasing a current from the second variable current source decreases a voltage at the output.

2. 发明授权

US08742852B2 Optical receiver compensating input offset 有权
标题翻译：光接收机补偿输入偏移
公开(公告)号：US08742852B2
公开(公告)日：2014-06-03
申请号：US13462057
申请日：2012-05-02
申请人： Yoshiyuki Sugimoto
发明人： Yoshiyuki Sugimoto
IPC分类号： H03F3/08
CPC分类号： H03F3/45085 , H03F3/087 , H03F3/45596 , H03F2200/405 , H04B10/6933
摘要： A differential amplifier capable of canceling an input offset current and expanding a linearly operating range is disclosed. The differential amplifier, which is preferably applicable to an optical receiver to convert a photocurrent into a voltage signal, includes a trans-impedance amplifier and an offset canceller that detects output offset and extracts input current to cancel the output offset. Moreover, the extracted input current traces the average level of the input voltage to widen the linearly operating range of the trans-impedance amplifier.
摘要翻译：公开了一种能够抵消输入偏移电流并扩大线性运行范围的差分放大器。优选地适用于将光电流转换为电压信号的光接收机的差分放大器包括检测输出偏移并提取输入电流以消除输出偏移的跨阻放大器和偏移消除器。此外，提取的输入电流跟踪输入电压的平均电平，以加宽跨阻放大器的线性工作范围。

3. 发明申请

US20120281991A1 OPTICAL RECEIVER COMPENSATING INPUT OFFSET 有权
标题翻译：光接收机补偿输入偏移
公开(公告)号：US20120281991A1
公开(公告)日：2012-11-08
申请号：US13462057
申请日：2012-05-02
申请人： Yoshiyuki SUGIMOTO
发明人： Yoshiyuki SUGIMOTO
IPC分类号： H03F3/45 , H04B10/06
CPC分类号： H03F3/45085 , H03F3/087 , H03F3/45596 , H03F2200/405 , H04B10/6933
摘要： A differential amplifier capable of canceling an input offset current and expanding a linearly operating range is disclosed. The differential amplifier, which is preferably applicable to an optical receiver to convert a photocurrent into a voltage signal, includes a trans-impedance amplifier and an offset canceller that detects output offset and extracts input current to cancel the output offset. Moreover, the extracted input current traces the average level of the input voltage to widen the linearly operating range of the trans-impedance amplifier.
摘要翻译：公开了一种能够抵消输入偏移电流并扩大线性运行范围的差分放大器。优选地适用于将光电流转换为电压信号的光接收机的差分放大器包括检测输出偏移并提取输入电流以消除输出偏移的跨阻放大器和偏移消除器。此外，提取的输入电流跟踪输入电压的平均电平，以加宽跨阻放大器的线性工作范围。

4. 发明授权

US6087883A Multi-tanh doublets using emitter resistors 有权
标题翻译：使用发射极电阻的多重双峰
公开(公告)号：US6087883A
公开(公告)日：2000-07-11
申请号：US212089
申请日：1998-12-15
申请人： Barrie Gilbert
发明人： Barrie Gilbert
IPC分类号： G06F7/44
CPC分类号： H03F3/45183 , H03F1/3211 , H03F3/211 , H03F3/45596 , H03F2203/45324 , H03F2203/45352 , H03F2203/45354 , H03F2203/45362 , H03F2203/45371 , H03F2203/45374
摘要： Multi-tanh cells constructed in accordance with the present invention provide improved input voltage range by utilizing resistors connected between the emitters of the transistors and the corresponding bias current sources. The resistor values and emitter area ratios are chosen to achieve substantially distortion-free transconductance functions over wide input voltage ranges. This improved input voltage range results in a corresponding improvement in dynamic range because the emitter resistances do not increase the noise significantly at low input voltage levels. In one embodiment, a separate resistor is connected in series with the emitter of each of the four doublet transistors. Another embodiment utilizes only a single bias current source and two emitter resistors to achieve better linearity and lower noise. To achieve higher effective emitter area ratios, an emitter follower scheme can be used to synthesize all or a portion of the area ratio. A series-connected version provides even wider input voltage range.
摘要翻译：根据本发明构造的多tanh电池通过利用连接在晶体管的发射极和相应的偏置电流源之间的电阻来提供改进的输入电压范围。选择电阻值和发射极面积比以在宽输入电压范围内实现基本无畸变的跨导功能。这种改进的输入电压范围导致动态范围的相应改善，因为在低输入电压电平下，发射极电阻不会显着增加噪声。在一个实施例中，单独的电阻器与四个双晶体管中的每一个的发射极串联连接。另一个实施例仅使用单个偏置电流源和两个发射极电阻来实现更好的线性度和更低的噪声。为了实现更高的有效发射极面积比，可以使用射极跟随器方案来合成面积比的全部或一部分。串联型号提供更宽的输入电压范围。

5. 发明授权

US09954496B2 Mitigating amplifier pop noise 有权
公开(公告)号：US09954496B2
公开(公告)日：2018-04-24
申请号：US15385200
申请日：2016-12-20
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Steven G. Brantley , Bharath Karthik Vasan , John Lawrence Caldwell
IPC分类号： H03F1/14 , H03F1/30 , H03F3/187 , H03G1/00 , H03G3/30 , H03F3/30 , H03F3/45
CPC分类号： H03F1/305 , H03F3/187 , H03F3/3069 , H03F3/45085 , H03F3/45596 , H03F2200/03 , H03F2200/375 , H03G1/0023 , H03G1/0088 , H03G3/3005 , H03G3/348
摘要： At least some embodiments are directed to a system comprising an amplifier containing a first bias current source and configured to provide an output voltage at a node, a gain stage coupled to the node and comprising a second bias current source, and a buffer stage coupled to the node and comprising third and fourth bias current sources and an additional set of bias current sources, the third and fourth bias current sources are able to activate output transistors that are configured to increase current provided to a load. The system also comprises a controller configured to activate the first bias current source, to activate the second bias current source after the first bias current source is activated, to activate the bias current sources in the set after the first bias current source is activated, and to activate the third and fourth bias current sources after the first and second bias current sources are activated and after the bias current sources in the set are activated.

6. 发明申请

US20170019080A1 GATED CDS INTEGRATOR 审中-公开
公开(公告)号：US20170019080A1
公开(公告)日：2017-01-19
申请号：US15277223
申请日：2016-09-27
申请人： U.S.A. as represented by the Administrator of the National Aeronautics and Space Administration
发明人： Gerard T. Quilligan , Shahid Aslam
IPC分类号： H03F3/387 , H03G3/20 , H03F3/45 , H03F1/26
CPC分类号： H03F3/387 , H03F1/26 , H03F3/45475 , H03F3/45596 , H03F3/72 , H03F2200/264 , H03F2200/271 , H03F2200/372 , H03F2203/45212 , H03F2203/45288 , H03F2203/45514 , H03G3/20
摘要： A Gated CDS Integrator (GCI) may amplify low-level signals without introducing excessive offset and noise. The GCI may also amplify the low level signals with accurate and variable gain. The GCI may include a modulator preceding an amplifier such that offset or noise present in a signal path between the modulator and a demodulator input is translated to a higher out of band frequency, and thereafter reduced by a double sampled discrete time integrator which also reduces thermal noise. The thermal noise may also be reduced by averaging the output of the discrete time integrator.
摘要翻译：门控CDS积分器（GCI）可以放大低电平信号，而不引入过大的偏移和噪声。 GCI还可以以精确和可变增益放大低电平信号。 GCI可以包括在放大器之前的调制器，使得存在于调制器和解调器输入之间的信号路径中的偏移或噪声被转换为更高的带外频率，然后由双取样的离散时间积分器减少，这也降低了热噪声。热噪声也可以通过平均离散时间积分器的输出来减小。

7. 发明授权

US07884650B2 Analog comparator comprising a digital offset compensation 有权
标题翻译：模拟比较器包括数字偏移补偿
公开(公告)号：US07884650B2
公开(公告)日：2011-02-08
申请号：US12270983
申请日：2008-11-14
申请人： Sreenivasa Chalamala , Matthias Baer
发明人： Sreenivasa Chalamala , Matthias Baer
IPC分类号： H03K5/22
CPC分类号： H03F3/45085 , H03F3/45183 , H03F3/45596 , H03F3/45744 , H03F2203/45438 , H03F2203/45726 , H03K5/2481 , H03K5/249
摘要： A digital compensation of an input stage of a comparator may be achieved by providing switched load elements, which may be appropriately connected to the differential input pair of the comparator in order to match transistor characteristics of the input pair and also match the load value of the input stage. Thus, enhanced offset behavior may be accomplished without providing an external signal and/or without requiring complex reference voltages/currents.
摘要翻译：比较器的输入级的数字补偿可以通过提供可被适当地连接到比较器的差分输入对的切换负载元件来实现，以便匹配输入对的晶体管特性，并且还匹配输入阶段因此，可以在不提供外部信号和/或不需要复杂的参考电压/电流的情况下实现增强的偏移行为。

8. 发明申请

US20070241818A1 CLASS AB FOLDED CASCODE STAGE AND METHOD FOR LOW NOISE, LOW POWER, LOW-OFFSET OPERATIONAL AMPLIFIER 有权
标题翻译：低噪声，低功率，低偏差运算放大器的AB类折叠机架级和方法
公开(公告)号：US20070241818A1
公开(公告)日：2007-10-18
申请号：US11279416
申请日：2006-04-12
申请人： Sergey Alenin , Henry Surtihadi
发明人： Sergey Alenin , Henry Surtihadi
IPC分类号： H03F3/45
CPC分类号： H03F3/45291 , H03F1/26 , H03F3/3066 , H03F3/45094 , H03F3/45596 , H03F3/45892 , H03F2200/264 , H03F2200/372 , H03F2203/45028 , H03F2203/45212
摘要： A class AB folded cascode circuit includes a differential current follower having first and second cascode transistors with emitters connected to first and second input conductors. An input of a first current mirror is coupled to the first input conductor, and an input of a second current mirror is coupled to the second input conductor. Outputs of the second and first current mirrors are coupled to collectors of the first and second cascode transistors, respectively, and also to first and second outputs, respectively, of the differential current follower. A third current mirror converts a differential output current in the first and second output conductors to a corresponding single-ended output voltage on the second output conductor.
摘要翻译： AB类折叠共源共栅电路包括具有第一和第二共源共栅晶体管的差分电流跟随器，发射极连接到第一和第二输入导体。第一电流镜的输入耦合到第一输入导体，并且第二电流镜的输入耦合到第二输入导体。第二和第一电流镜的输出分别耦合到第一和第二共源共栅晶体管的收集器，以及分别耦合到差动电流跟随器的第一和第二输出端。第三电流镜将第一和第二输出导体中的差分输出电流转换为第二输出导体上相应的单端输出电压。

9. 发明授权

US07224227B1 Apparatus and method for correction of error caused by reverse saturation current mismatch 有权
标题翻译：用于校正由反饱和电流失配引起的误差的装置和方法
公开(公告)号：US07224227B1
公开(公告)日：2007-05-29
申请号：US11035156
申请日：2005-01-12
申请人： Ajay Kumar
发明人： Ajay Kumar
IPC分类号： H03F3/45
CPC分类号： H03F3/3432 , H03F1/30 , H03F3/4508 , H03F3/45596 , H03F2200/462
摘要： A buffer circuit is arranged for offset cancellation between an input voltage and a buffered voltage. The buffer circuit includes two bias current sources, two p-type transistors, and two n-type transistors. Further, the base-emitter voltages of the two p-type transistors and the two n-type transistors are arranged to form a translinear loop. The translinear loop is arranged to provide the buffered voltage from the input voltage. One of the bias sources is arranged to provide a bias current to one of the p-type transistors, and the other bias circuit is arranged to provide a bias current to one of the n-type transistors. One of the bias current circuits is arranged to actively sense the reverse saturation currents of the p-type transistors and the n-type transistors, and to provide its bias current so that the offset voltage between the input voltage and the buffered voltage is substantially cancelled.
摘要翻译：缓冲电路被布置用于输入电压和缓冲电压之间的偏移消除。缓冲电路包括两个偏置电流源，两个p型晶体管和两个n型晶体管。此外，两个p型晶体管和两个n型晶体管的基极 - 发射极电压被布置成形成跨线性环路。跨导线圈被设置成从输入电压提供缓冲电压。偏置源之一被布置成向p型晶体管之一提供偏置电流，并且另一偏置电路被布置为向n型晶体管中的一个提供偏置电流。偏置电流电路之一被布置成主动地感测p型晶体管和n型晶体管的反向饱和电流，并提供其偏置电流，使得输入电压和缓冲电压之间的偏移电压被基本上取消。

10. 发明授权

US06972620B2 Post amplifier array integrated circuit 有权
标题翻译：后置放大器阵列集成电路
公开(公告)号：US06972620B2
公开(公告)日：2005-12-06
申请号：US10782648
申请日：2004-02-19
申请人： Nelson Diaz , Michael Thomas Dudek
发明人： Nelson Diaz , Michael Thomas Dudek
IPC分类号： H01J40/14 , H03F1/02 , H03F3/45 , H03F3/52 , H03F3/72 , H04J14/08
CPC分类号： H03F3/45085 , H03F1/0277 , H03F3/45596 , H03F3/72 , H03F2200/78
摘要： An optical communication system that includes a multi-channel post amplifier assembly with flexible output configurations for amplifying optical-to-electrical converted signals on selectable groups of amplifier channels is provided. The post amplifier assembly, when implemented on a single IC chip, is capable of operating with either the 2.5V or 3.3V of power supply. In addition, the IC chip containing the post amplifier assembly provides capability to selectively turn off one or more post amplifier channels during operation. Further, the post amplifiers provide integral auto zero function without requiring a use of external capacitors.
摘要翻译：提供了一种光通信系统，其包括具有灵活的输出配置的多通道后置放大器组件，用于放大可选择的放大器通道组上的光电转换信号。后放大器组件在单个IC芯片上实现时，可以使用2.5V或3.3V的电源供电。此外，包含后置放大器组件的IC芯片提供了在操作期间选择性地关闭一个或多个后置放大器通道的能力。此外，后置放大器提供积分自动调零功能，而不需要使用外部电容器。

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