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1. 发明授权

US09203351B2 Offset cancellation with minimum noise impact and gain-bandwidth degradation 有权
标题翻译：偏移消除具有最小的噪声影响和增益带宽的降级
公开(公告)号：US09203351B2
公开(公告)日：2015-12-01
申请号：US13838171
申请日：2013-03-15
申请人： MEGACHIPS CORPORATION
发明人： Takahiro Itagaki , Sarath Chandrasekhar Venkatesh Kumar , Anand Gopalan , Shankarram Athreya
IPC分类号： H03F3/45 , H03F1/26 , H03F1/14
CPC分类号： H03F1/26 , H03F1/14 , H03F3/45183 , H03F3/45475 , H03F3/45941 , H03F2200/375 , H03F2200/408 , H03F2203/45212 , H03F2203/45512 , H03F2203/45521 , H03F2203/45528 , H03F2203/45544 , H03F2203/45562 , H03F2203/45641 , H03F2203/45642 , H03F2203/45681 , H03F2203/45702
摘要： A system for cancelling offset includes a gain circuit. The gain circuit may include a transistor circuit connected to a pair of input nodes and configured to convert an input signal to an output signal so that the output signal has a gain compared with the input signal. The gain circuit also may include a pair of output nodes configured to receive the output signal from the transistor circuit. The gain circuit is configured to cause a voltage change at one of the output nodes relative to another output node, in response to the gain circuit receiving a feedback offset correction signal. This effectively cancels at least a portion of an offset in the output signal.
摘要翻译：消除偏移的系统包括增益电路。增益电路可以包括连接到一对输入节点并被配置为将输入信号转换为输出信号的晶体管电路，使得输出信号与输入信号相比具有增益。增益电路还可以包括被配置为从晶体管电路接收输出信号的一对输出节点。增益电路被配置为响应于增益电路接收到反馈偏移校正信号而导致相对于另一个输出节点在输出节点之一处的电压变化。这有效地抵消了输出信号中的偏移的至少一部分。

2. 发明授权

US09166541B2 Signal processing circuit, resolver digital converter, and multipath nested mirror amplifier 有权
标题翻译：信号处理电路，旋转变压器数字转换器和多路径嵌套式镜像放大器
公开(公告)号：US09166541B2
公开(公告)日：2015-10-20
申请号：US14254294
申请日：2014-04-16
申请人： RENESAS ELECTRONICS CORPORATION
发明人： Yoshihiro Funato , Toshio Kumamoto , Tomoaki Yoshizawa , Kazuaki Kurooka
IPC分类号： H03F1/02 , H03F3/217 , H03F3/393 , H03F3/45
CPC分类号： H03F3/2171 , H03F3/005 , H03F3/393 , H03F3/45179 , H03F3/45192 , H03F3/45762 , H03F3/45946 , H03F2200/264 , H03F2200/271 , H03F2200/375 , H03F2200/408 , H03F2200/411 , H03F2200/81 , H03F2203/45012 , H03F2203/45028 , H03F2203/45116 , H03F2203/45136 , H03F2203/45138 , H03F2203/45174 , H03F2203/45212 , H03F2203/45512 , H03F2203/45528 , H03F2203/45558 , H03F2203/45594 , H03F2203/45601 , H03F2203/45604 , H03F2203/45631 , H03F2203/45632 , H03F2203/45634 , H03F2203/45641 , H03F2203/45681 , H03F2203/45698 , H03F2203/45726
摘要： A signal processing circuit includes a chopper amplifier that has a differential amplifier circuit that amplifies differential input signals Vsp(t) and Vsm(t), and an adder circuit that generates an addition signal Vfil(t) by addition of the chopper output signal Vsub(t) that the chopper amplifier generates. Differential signals inputted into the differential amplifier circuit are interchanged for every first phase period and second phase period, and the adder circuit generates the addition signal by addition of the chopper output signal in the first phase period and in the second phase period.
摘要翻译：信号处理电路包括具有放大差分输入信号Vsp（t）和Vsm（t）的差分放大器电路的斩波放大器，以及通过将斩波器输出信号Vsub相加产生相加信号Vfil（t）的加法电路（t）斩波放大器产生。输入到差分放大器电路的差分信号每第一相位周期和第二相位周期互换，并且加法器电路通过在第一相位周期和第二相位周期中相加斩波输出信号来生成相加信号。

3. 发明授权

US09134349B2 Amplifier circuits and methods 有权
标题翻译：放大器电路和方法
公开(公告)号：US09134349B2
公开(公告)日：2015-09-15
申请号：US13711571
申请日：2012-12-11
申请人： BCD Semiconductor Manufacturing Limited
发明人： Jinxi Hu , Jiabin Wang , Xujiang Huang
IPC分类号： G01R15/20 , G01R33/07 , H03F3/387 , H03F3/45
CPC分类号： G01R15/202 , G01R33/07 , H03F3/387 , H03F3/45475 , H03F3/45995 , H03F2200/261 , H03F2203/45138 , H03F2203/45528 , H03F2203/45538 , H03F2203/45551 , H03F2203/45588 , H03F2203/45624 , H03F2203/45634 , H03F2203/45681
摘要： A chopper amplifier circuit for sensing Hall voltage with reduced offsets includes a Hall sampling circuit with a first switching circuit for selectively coupling each of four nodes of a Hall plate to either a power source or a ground terminal. The circuit also includes a differential amplifier and a second switching circuit configured for selectively coupling each of the four nodes to inputs of the differential amplifier. A Hall voltage signal retaining circuit includes two groups of four storage devices and a second group of four storage devices. A third switching circuit is configured for outputs of the differential amplifier to selected ones of the storage devices. A fourth switching circuit is configured for selectively coupling the storage devices outputs of the chopper amplifier circuit.
摘要翻译：用于以减小的偏移量感测霍尔电压的斩波放大器电路包括具有第一开关电路的霍尔采样电路，用于选择性地将霍尔板的四个节点中的每一个耦合到电源或接地端子。电路还包括差分放大器和配置用于选择性地将四个节点中的每一个耦合到差分放大器的输入的第二开关电路。霍尔电压信号保持电路包括两组四个存储装置和第二组四个存储装置。第三开关电路被配置用于将差分放大器的输出与所选存储器件的输出相配合。第四开关电路被配置为选择性地耦合斩波放大器电路的存储设备输出。

4. 发明申请

US20130342274A1 DC-COUPLED PEAK DETECTOR 有权
标题翻译：直流耦合峰值检测器
公开(公告)号：US20130342274A1
公开(公告)日：2013-12-26
申请号：US13532575
申请日：2012-06-25
申请人： Abdulkarim Coban , Wenhuan Yu
发明人： Abdulkarim Coban , Wenhuan Yu
IPC分类号： H03F3/45
CPC分类号： H03F1/223 , H03F3/195 , H03F3/211 , H03F3/45192 , H03F3/45748 , H03F2200/294 , H03F2200/336 , H03F2200/435 , H03F2200/78 , H03F2203/45528 , H03F2203/45641 , H03F2203/45648 , H03F2203/45678 , H03F2203/45681 , H03F2203/45702
摘要： Techniques are disclosed relating to peak detection. In one embodiment, an apparatus is disclosed that includes an amplifier configured to amplify a signal. The apparatus further includes a peak detector DC coupled to an output of the amplifier. The peak detector includes a first comparator stage configured to perform subtraction of a threshold signal from the amplified signal. The peak detector further includes a second comparator stage is configured to amplify a differential output signal of the first comparator stage indicative of a result of the subtraction. In some embodiments, the amplifier and peak detector are included within automatic gain control system in a path for an in-phase or quadrature channel of the receiver chain.
摘要翻译：公开了关于峰值检测的技术。在一个实施例中，公开了一种包括被配置为放大信号的放大器的装置。该装置还包括耦合到放大器的输出的峰值检测器DC。峰值检测器包括被配置为执行从放大信号中减去阈值信号的第一比较器级。峰值检测器还包括第二比较器级，被配置为放大表示减法结果的第一比较器级的差分输出信号。在一些实施例中，放大器和峰值检测器被包括在用于接收机链的同相或正交信道的路径中的自动增益控制系统内。

5. 发明申请

US20130294179A1 CIRCUITS AND METHODS FOR CALIBRATING OFFSET IN AN AMPLIFIER 审中-公开
标题翻译：用于校正放大器偏移的电路和方法
公开(公告)号：US20130294179A1
公开(公告)日：2013-11-07
申请号：US13723401
申请日：2012-12-21
申请人： Marvell World Trade Ltd.
发明人： Winston Lee , Peter Lee
IPC分类号： H03F3/45 , G11C7/06
CPC分类号： H03F3/45179 , G11C7/06 , G11C7/062 , G11C29/02 , G11C29/026 , G11C29/028 , G11C2207/2254 , H03F3/45475 , H03F3/45968 , H03F2203/45048 , H03F2203/45101 , H03F2203/45212 , H03F2203/45586 , H03F2203/45588 , H03F2203/45681
摘要： In one embodiment, the present disclosure includes a circuit comprising an amplifier having an input and an output, an offset detection circuit to detect an offset of the amplifier at the output of the amplifier, and an offset generation circuit having an input coupled to the offset detection circuit and an output coupled to the input of the amplifier to generate an offset at the input of the amplifier during an operational phase of the amplifier based on the detected offset. The generated offset cancels a least a portion of the offset of the amplifier. In one implementation, the amplifier is a sense amplifier in a memory.
摘要翻译：在一个实施例中，本公开包括一个包括具有输入和输出的放大器的电路，用于检测在放大器输出处的放大器的偏移的偏移检测电路，以及偏移产生电路，其具有耦合到偏移的输入检测电路和耦合到放大器的输入端的输出端，以在放大器的运算阶段基于检测到的偏移量在放大器的输入处产生偏移。产生的偏移消除了放大器偏移的至少一部分。在一个实现中，放大器是存储器中的读出放大器。

6. 发明授权

US08570095B1 Offset-compensated active load and method 有权
标题翻译：偏移补偿有源负载和方法
公开(公告)号：US08570095B1
公开(公告)日：2013-10-29
申请号：US13469416
申请日：2012-05-11
申请人： Marc Henri Ryat
发明人： Marc Henri Ryat
IPC分类号： G05F1/10
CPC分类号： H03F3/45183 , H03F3/45632 , H03F3/45771 , H03F2203/45616 , H03F2203/45681 , H03F2203/45726
摘要： In accordance with an embodiment, an offset-compensated active load includes a pair of transistors having control electrodes connected to their drain electrodes through coupling devices. The control electrodes of the transistors are connected to each other through a plurality of charge storage elements. In accordance with another embodiment, an offset current is generated in response to coupling input terminals of an input stage together. The offset current flows towards an active load which generates an offset voltage in response to the offset current. The offset voltage is stored in the plurality of charge storage devices of the offset-compensated active load.
摘要翻译：根据实施例，偏移补偿有源负载包括一对晶体管，其具有通过耦合器件连接到其漏电极的控制电极。晶体管的控制电极通过多个电荷存储元件相互连接。根据另一实施例，响应于输入级的输入端耦合而产生偏移电流。偏移电流流向有源负载，该有源负载响应于偏移电流产生偏移电压。偏移电压存储在偏移补偿有源负载的多个电荷存储装置中。

7. 发明申请

US20130147553A1 AUTO-ZERO AMPLIFIER AND FEEDBACK AMPLIFIER CIRCUIT USING THE AUTO-ZERO AMPLIFIER 有权
标题翻译：使用自动零放大器的自动零放大器和反馈放大器电路
公开(公告)号：US20130147553A1
公开(公告)日：2013-06-13
申请号：US13675162
申请日：2012-11-13
申请人： FUJI ELECTRIC CO., LTD.
发明人： Motomitsu IWAMOTO
IPC分类号： H03F3/45 , H03F1/34
CPC分类号： H03F3/45179 , H03F1/342 , H03F3/45183 , H03F3/45475 , H03F3/45968 , H03F3/45986 , H03F2203/45536 , H03F2203/45544 , H03F2203/45562 , H03F2203/45588 , H03F2203/45614 , H03F2203/45616 , H03F2203/45618 , H03F2203/45644 , H03F2203/45674 , H03F2203/45681 , H03F2203/45684 , H03F2203/45724
摘要： In aspects of the invention, at normal operation, an operational amplifier circuit has feedback applied from the output thereof to the input thereof so that currents equal to each other flow in differential pair transistors, respectively. While, in order that currents equal to each other may flow in the differential pair transistors, respectively, for compensating the difference in threshold voltages in the differential pair transistors, a voltage lower by a certain voltage difference than the voltage applied to the gate terminal of the transistor must be applied to the gate terminal of the transistor. From this, the switching of switches, when a virtual short circuit occurs, can make the output voltage of the operational amplifier circuit become a signal in which positive and negative rectangular ripples, with the values thereof being proportional to the value of the certain voltage difference, are superimposed on a true value.
摘要翻译：在本发明的方面中，在正常操作中，运算放大器电路具有从其输出到其输入端的反馈，使得彼此相等的电流分别在差分对晶体管中流动。而为了分别在差分对晶体管中流过彼此相等的电流，用于补偿差分对晶体管中的阈值电压的差异，电压比施加到栅极端子的电压低一定的电压差晶体管必须施加到晶体管的栅极端子。由此，当虚拟短路发生时，开关的切换可以使运算放大器电路的输出电压成为正和负矩形波纹的信号，其值与特定电压差的值成正比，被叠加在真实值上。

8. 发明授权

US08018281B2 Method and device for performing offset cancellation in an amplifier using floating-gate transistors 有权
标题翻译：在使用浮栅晶体管的放大器中进行偏移消除的方法和装置
公开(公告)号：US08018281B2
公开(公告)日：2011-09-13
申请号：US12728773
申请日：2010-03-22
申请人： Paul Hasler , Venkatesh Srinivasan , Guillermo Serrano , Jordan Gray
发明人： Paul Hasler , Venkatesh Srinivasan , Guillermo Serrano , Jordan Gray
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , H03F3/45475 , H03F3/45744 , H03F3/45968 , H03F2203/45121 , H03F2203/45661 , H03F2203/45681
摘要： An operational amplifier including: a differential pair of transistors coupled to a pair of input signals; and a pair of floating-gate transistors coupled to the differential pair of transistors, wherein the pair of floating-gate transistors are operable for reducing an offset voltage of the operational amplifier.
摘要翻译：一种运算放大器，包括：耦合到一对输入信号的差分对晶体管; 以及耦合到所述差分对晶体管的一对浮栅晶体管，其中所述一对浮栅晶体管可操作用于减小所述运算放大器的偏移电压。

9. 发明授权

US07994865B1 Even order distortion cancellation in single-ended input, differential output amplifiers using feedback 有权
标题翻译：单端输入中的偶数阶失真消除，使用反馈的差分输出放大器
公开(公告)号：US07994865B1
公开(公告)日：2011-08-09
申请号：US12163405
申请日：2008-06-27
申请人： Danilo Manstretta , Fernando De Bernardinis
发明人： Danilo Manstretta , Fernando De Bernardinis
IPC分类号： H03F3/04
CPC分类号： H03F3/195 , H03F1/3211 , H03F1/3247 , H03F1/342 , H03F3/45475 , H03F2200/451 , H03F2203/45511 , H03F2203/45681
摘要： An amplifier and a method for converting a single ended signal to an amplified differential signal. The amplifier comprises an input configured to receive a single ended signal, a differential amplifier that outputs an amplified differential signal based on the single ended signal, and a compensator coupled to the differential amplifier and configured to inject an adjusted distortion compensating signal based on the even order distortion signal to compensate for a distortion in the amplified differential signal. The method comprises receiving a single ended signal, converting the single ended signal to an amplified differential signal, and generating a distortion compensating signal to substantially cancel an even order distortion signal injected to the differential signal by the converting.
摘要翻译：一种用于将单端信号转换为放大的差分信号的放大器和方法。所述放大器包括被配置为接收单端信号的输入端，基于所述单端信号输出放大的差分信号的差分放大器，以及耦合到所述差分放大器并被配置为基于所述均衡信号来输入调整的失真补偿信号的补偿器用于补偿放大的差分信号中的失真。该方法包括接收单端信号，将单端信号转换为放大的差分信号，以及产生失真补偿信号，以基本上消除通过转换注入差分信号的偶数阶失真信号。

10. 发明授权

US07944287B2 Low-noise, wide offset range, programmable input offset amplifier front end and method 有权
标题翻译：低噪声，宽偏移范围，可编程输入失调放大器前端和方法
公开(公告)号：US07944287B2
公开(公告)日：2011-05-17
申请号：US12229278
申请日：2008-08-21
申请人： Tony R. Larson , Dimitar T. Trifonov , Jerry L. Doorenbos
发明人： Tony R. Larson , Dimitar T. Trifonov , Jerry L. Doorenbos
IPC分类号： H03F1/02
CPC分类号： H03F3/45475 , H03F3/45183 , H03F3/45197 , H03F3/45928 , H03F3/72 , H03F2203/45101 , H03F2203/45482 , H03F2203/45494 , H03F2203/45616 , H03F2203/45678 , H03F2203/45681
摘要： A programmable offset amplifier includes first (M1) and second (M2) input transistors having differentially connected sources and gates coupled to first (Vin+) and second (Vin−) input voltages. A tail current (Itail1) is shared between the first and second input transistors. First (M3) and second (M4) load devices are coupled between a reference voltage and drains of the first and second input transistors, respectively. An output stage (13) has a first input (+) coupled to the drain of the second input transistor and a second input (−) coupled to the drain of the first input transistor. Programmable voltage changes are produced on input elements of programmable input offset circuitry to cause changes in offset voltages associated with electrodes of the input transistors which are reflected back to the amplifier input to provide a large programmable input-referred offset voltage.
摘要翻译：可编程偏移放大器包括具有与第一（Vin +）和第二（Vin-）输入电压耦合的差分连接的源极和第一（M1）和第二（M2）输入晶体管。尾电流（Itail1）在第一和第二输入晶体管之间共享。第一（M3）和第二（M4）负载装置分别耦合在参考电压和第一和第二输入晶体管的漏极之间。输出级（13）具有耦合到第二输入晶体管的漏极的第一输入（+）和耦合到第一输入晶体管的漏极的第二输入（ - ）。可编程电压变化在可编程输入偏移电路的输入元件上产生，以引起与输入晶体管的电极相关联的偏移电压的变化，其被反射回到放大器输入端以提供大的可编程输入参考偏移电压。

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