公开(公告)号：US20090289713A1

公开(公告)日：2009-11-26

申请号：US12385881

申请日：2009-04-22

申请人： Toshiaki Motoyui

发明人： Toshiaki Motoyui

IPC分类号： H03F3/45

CPC分类号： H03F3/45183 ,  H03F3/45771 ,  H03F2200/453 ,  H03F2200/456 ,  H03F2203/45044 ,  H03F2203/45681 ,  H03F2203/45726 ,  H03G1/0088

摘要： A differential amplifier circuit includes an offset adjuster circuit for varying the active load to adjust the offset caused by the differential pair. The differential amplifier circuit includes fine adjustment cell sections including a plurality of transistors having the substantially same size, and shift cell sections including transistors, whose transistor size is larger than the transistors of the fine adjustment cell sections.

摘要翻译： 差分放大器电路包括用于改变有效负载以调整由差分对引起的偏移的偏移调整器电路。 差分放大器电路包括具有大致相同尺寸的多个晶体管的精细调整单元部分和包括晶体管尺寸大于微调单元部分的晶体管的晶体管的移位单元部分。

公开(公告)号：US07279951B2

公开(公告)日：2007-10-09

申请号：US10372967

申请日：2003-07-14

申请人： Akihiko Ono

发明人： Akihiko Ono

IPC分类号： H03L5/00

CPC分类号： H03F3/45098 ,  H03F3/087 ,  H03F3/45179 ,  H03F3/45183 ,  H03F3/45475 ,  H03F3/45753 ,  H03F3/45771 ,  H03F3/45973 ,  H03F3/45977 ,  H03F3/45982 ,  H03F3/45995 ,  H03F2203/45521 ,  H03K5/003 ,  H03K5/007 ,  H03K5/08 ,  H03K5/13 ,  H03K5/153 ,  H04B10/6933

摘要： A DC offset cancellation circuit that is capable of canceling a DC offset voltage occurring between a pair of differential output signals of a differential amplification circuit, while preventing a signal waveform from being distorted due to accumulation of AC components and a photo-electric pulse conversion circuit that is capable of generating an electrical pulse signal that accurately reproduces a rise timing and a fall timing of an optical pulse signal by canceling the DC offset voltage are provided. A photo-electric pulse conversion circuit is provided with a photodiode, an I-V conversion circuit, a first differential amplification circuit having a DC offset cancellation circuit, a second differential amplification circuit, a reference voltage generation circuit, and a comparison circuit. The DC offset cancellation circuit uses a changeover circuit to change a state of a low-pass filter with a hold function in synchronization with an inversion electrical pulse signal, and performs a negative feedback of a filtered signal which is generated by subjecting third differential signals to low-pass filtration or a hold filtered signal which is a filtered signal held during changeover.

摘要翻译： 一种DC偏移消除电路，其能够抵消在差分放大电路的一对差分输出信号之间出现的DC偏移电压，同时防止信号波形由于AC分量的累积而失真，并且光电脉冲转换电路 提供能够产生通过消除DC偏移电压来精确地再现上升定时和光脉冲信号的下降定时的电脉冲信号。 光电脉冲转换电路设置有光电二极管，I-V转换电路，具有DC偏移消除电路的第一差分放大电路，第二差分放大电路，参考电压产生电路和比较电路。 DC偏移消除电路使用转换电路与反转电脉冲信号同步地改变具有保持功能的低通滤波器的状态，并且对经过第三差分信号产生的滤波信号进行负反馈 低通滤波或保持滤波信号，其是在切换期间保持的滤波信号。

公开(公告)号：US06704365B2

公开(公告)日：2004-03-09

申请号：US09853013

申请日：2001-05-10

申请人： Robert John Haycock

发明人： Robert John Haycock

IPC分类号： H04B300

CPC分类号： H04L25/0282 ,  H03F3/45771 ,  H04L25/0272 ,  H04L25/0288

摘要： A driver transmits data as a difference in the currents along two transmission lines. The driver provides a difference in the currents which is greater for relatively high frequency components, by transmitting relatively low frequency components in the data to both of the transmission lines. The degree to which low frequency components are transmitted to one of the lines is dependent upon the width (gain) of a transistor, and thus may be varied by changing the transistor width rather than the value of a passive component. In some versions of the device, the frequency response of the driver can be varied by selecting combinations of transistors to provide this gain. A calibration method allows the variable response to be tuned to properties of the transmission lines.

摘要翻译： 驱动器沿着两条传输线传输数据作为电流差。 驱动器通过将数据中的相对低频分量传输到两个传输线，来提供对于相对高频分量更大的电流的差异。 将低频分量传输到一条线路的程度取决于晶体管的宽度（增益），因此可以通过改变晶体管宽度而不是无源部件的值来改变。 在器件的某些版本中，通过选择晶体管的组合以提供该增益，可以改变驱动器的频率响应。 校准方法允许将变量响应调谐到传输线的属性。

公开(公告)号：US20030222696A1

公开(公告)日：2003-12-04

申请号：US10372967

申请日：2003-07-14

申请人： FUJITSU LIMITED

发明人： Akihiko Ono

IPC分类号： H03L005/00

CPC分类号： H03F3/45098 ,  H03F3/087 ,  H03F3/45179 ,  H03F3/45183 ,  H03F3/45475 ,  H03F3/45753 ,  H03F3/45771 ,  H03F3/45973 ,  H03F3/45977 ,  H03F3/45982 ,  H03F3/45995 ,  H03F2203/45521 ,  H03K5/003 ,  H03K5/007 ,  H03K5/08 ,  H03K5/13 ,  H03K5/153 ,  H04B10/6933

摘要： A DC offset cancellation circuit that is capable of canceling a DC offset voltage occurring between a pair of differential output signals of a differential amplification circuit, while preventing a signal waveform from being distorted due to accumulation of AC components and a photo-electric pulse conversion circuit that is capable of generating an electrical pulse signal that accurately reproduces a rise timing and a fall timing of an optical pulse signal by canceling the DC offset voltage are provided. A photo-electric pulse conversion circuit is provided with a photodiode, an I-V conversion circuit, a first differential amplification circuit having a DC offset cancellation circuit, a second differential amplification circuit, a reference voltage generation circuit, and a comparison circuit. The DC offset cancellation circuit uses a changeover circuit to change a state of a low-pass filter with a hold function in synchronization with an inversion electrical pulse signal, and performs a negative feedback of a filtered signal which is generated by subjecting third differential signals to low-pass filtration or a hold filtered signal which is a filtered signal held during changeover.

公开(公告)号：US06628169B2

公开(公告)日：2003-09-30

申请号：US10367046

申请日：2003-02-14

申请人： Vadim V. Ivanov ,  Junlin Zhou ,  Wally Meinel

发明人： Vadim V. Ivanov ,  Junlin Zhou ,  Wally Meinel

IPC分类号： H03F345

CPC分类号： H03F3/45995 ,  H03F1/303 ,  H03F3/45771 ,  H03F2200/261

摘要： An exemplary trimming circuit can be further simplified to include a single current source to provide for trimming of offset and temperature drift in a device, such as an op amp, voltage reference and the like. A single temperature-dependent current source is trimmed to a predetermined value, for example to zero, at a first temperature, and then the current from the temperature-dependent current source is used to trim output parameters, i.e., adjust the output variables, to a desired value at a second temperature. An exemplary trimming circuit comprises a temperature-dependent current source I(T), a current switch and a device to be, trimmed. The current switch is configured to suitably facilitate the trimming of the trimmed device through coupling of a fraction or multiple of the current signal from temperature-dependent current source I(T) to one or more offset-control terminals of the trimmed device.

摘要翻译： 可以进一步简化示例性微调电路以包括单个电流源以提供对器件（例如运算放大器，电压基准等）中的偏移和温度漂移的修整。 单个温度依赖电流源在第一温度被修剪到预定值，例如为零，然后来自温度相关电流源的电流用于修整输出参数，即将输出变量调整为 在第二温度下的期望值。 示例性的修整电路包括温度依赖电流源I（T），电流开关和待修整的器件。 电流开关被配置为通过将来自温度的电流源I（T）的电流信号的一部分或多个的一部分耦合到修整的器件的一个或多个偏移控制端子来适当地促进修整器件的修整。

公开(公告)号：US20030090300A1

公开(公告)日：2003-05-15

申请号：US10331223

申请日：2002-12-30

申请人： Xilinx, Inc.

发明人： Michael A. Nix

IPC分类号： H03K005/153

CPC分类号： H03K5/249 ,  H03F3/45753 ,  H03F3/45771 ,  H03K5/2481

摘要： A differential comparator having offset correction and common mode control for providing stable op amp output that changes only due to the original inputs coming into the comparator. The difference comparator has increased common-mode difference tolerance, and large op-amp offset tolerance, as well as fast decision time.

摘要翻译： 具有偏移校正和共模控制的差分比较器，用于提供仅由于进入比较器的原始输入而改变的稳定的运放输出。 差分比较器增加了共模差分容差，以及较大的运算放大器偏移容差，以及快速的决策时间。

公开(公告)号：US06563374B1

公开(公告)日：2003-05-13

申请号：US10099547

申请日：2002-03-15

申请人： James E. Jaussi ,  Bryan K. Casper

发明人： James E. Jaussi ,  Bryan K. Casper

IPC分类号： H03F345

CPC分类号： H03F3/45183 ,  H03F3/45771 ,  H03F2203/45574

摘要： A variable offset amplifier circuit includes two differential transistor pairs and a variable current generator coupled to each differential pair to control tail current. Each differential transistor pair has a first transistor and a second transistor. The first transistors are for coupling to first and second loads. A current mirror and shunt is coupled to shunt a portion of current flowing through one of the first transistors from flowing through a correspondingly coupled load. The shunt current is mirrored from one of the second transistors to provide either positive current feedback or negative current feedback. The amplifier circuit has applications in a comparator circuit that also has a regenerative latch circuit, and as a sense amplifier in a receiver of a communications system.

摘要翻译： 可变偏移放大器电路包括两个差分晶体管对和耦合到每个差分对的可变电流发生器以控制尾电流。 每个差分晶体管对具有第一晶体管和第二晶体管。 第一晶体管用于耦合到第一和第二负载。 电流镜和分流器被耦合以分流流过第一晶体管中的一个的电流的一部分流过相应耦合的负载。 分流电流从第二晶体管之一镜像，以提供正电流反馈或负电流反馈。 放大器电路在比较器电路中也具有应用，该比较器电路还具有再生锁存电路，以及作为通信系统的接收器中的读出放大器。

公开(公告)号：US06259644B1

公开(公告)日：2001-07-10

申请号：US09564308

申请日：2000-05-03

申请人： Lung T Tran ,  Frederick A Perner ,  James A Brug

发明人： Lung T Tran ,  Frederick A Perner ,  James A Brug

IPC分类号： G11C702

CPC分类号： B82Y10/00 ,  G11C11/15 ,  G11C11/16 ,  H03F1/304 ,  H03F3/45479 ,  H03F3/45771 ,  H03F2203/45048 ,  H03F2203/45291 ,  H03F2203/45342 ,  H03F2203/45624 ,  H03F2203/45726

摘要： An equal potential may be applied to a selected bit line and unselected bit lines during a read operation on a memory cell in a resistive cross point array. In the alternative, an equal potential may be applied to the selected bit line and unselected word lines.

摘要翻译： 在电阻交叉点阵列中的存储单元的读取操作期间，可以将相等的电位施加到所选位线和未选位线。 在替代方案中，可以将相等的电位施加到所选择的位线和未选择的字线。

公开(公告)号：US06198329B1

公开(公告)日：2001-03-06

申请号：US09438252

申请日：1999-11-12

申请人： William Richard Ezell ,  Robert Mounger

发明人： William Richard Ezell ,  Robert Mounger

IPC分类号： H03L500

CPC分类号： H03F3/45183 ,  H03F3/45771 ,  H03F2203/45674 ,  H03F2203/45726 ,  H03K5/2481

摘要： A circuit and associated method for determining the offset bias of a comparator by first shorting together the inputs of the comparator to apply the same voltage signal at each of the inputs of the comparator. The voltage signal at one of the inputs is then offset a select amount by applying varying selected resistances from a variable resistor to the comparator. The variable resistor is controlled by a programmable controller that is responsive to an input clock signal. At each selected amount of offset applied to the input, the output is monitored to determine if the output of the comparator has flipped, or changed state. When the output flips, the corresponding resistance setting is used to compensate for the corresponding offset bias of the comparator.

摘要翻译： 一种用于通过首先使比较器的输入短路以在比较器的每个输入处施加相同的电压信号来确定比较器的偏移偏置的电路和相关联的方法。 然后通过从可变电阻器向比较器施加不同的选择的电阻，在一个输入端的电压信号被偏移选择量。 可变电阻由可响应于输入时钟信号的可编程控制器控制。 在每个选定的偏移量应用于输入时，监视输出以确定比较器的输出是否翻转或改变状态。 当输出翻转时，相应的电阻设置用于补偿比较器的相应偏移偏置。

公开(公告)号：US20130207720A1

公开(公告)日：2013-08-15

申请号：US13752538

申请日：2013-01-29

申请人： STMICROELECTRONICS (ROUSSET) SAS

发明人： Michel CUENCA ,  Laurent Truphemus

IPC分类号： H03F3/45

CPC分类号： H03F3/45076 ,  H03F1/086 ,  H03F3/45192 ,  H03F3/45771 ,  H03F2200/36 ,  H03F2200/447 ,  H03F2203/45322 ,  H03F2203/45391 ,  H03F2203/45392 ,  H03F2203/45471

摘要： An operational amplifier may include a differential stage comprising two transistors whose gates are respectively linked to the two inputs of the operational amplifier. The sources of the two transistors may be linked to a first current source whose delivered current depends negatively on temperature variations and to a second current source whose delivered current is proportional to absolute temperature. The sum of these two currents may be less dependent on temperature, in that this link of the sources of the two transistors with the two current sources is effected respectively by way of two resistors, and in that the current which passes through the two transistors is imposed of proportional with temperature type, so as to allow substantially temperature-independent elimination of the offset voltage of the operational amplifier while obtaining a temperature-independent constant gain-bandwidth product.

摘要翻译： 运算放大器可以包括差分级，其包括两个晶体管，其栅极分别连接到运算放大器的两个输入端。 两个晶体管的源极可以连接到其传递的电流取决于温度变化的第一电流源以及传递的电流与绝对温度成比例的第二电流源。 这两个电流的总和可能不太依赖于温度，因为两个晶体管与两个电流源的源极的这个连接分别通过两个电阻器实现，并且通过两个晶体管的电流是 施加与温度类型成比例的，以便在获得与温度无关的恒定增益带宽积的同时，允许基本上温度独立地消除运算放大器的偏移电压。