公开(公告)号：US08014098B1

公开(公告)日：2011-09-06

申请号：US12843669

申请日：2010-07-26

申请人： Jeremy Robert Kuehlwein ,  Craig Matthew Brannon

发明人： Jeremy Robert Kuehlwein ,  Craig Matthew Brannon

IPC分类号： G11B5/02

CPC分类号： G11B5/012 ,  G11B5/09 ,  H03F3/45112 ,  H03F2203/45101 ,  H03F2203/45678

摘要： A circuit for providing a write current having a programmably adjustable duty cycle in a hard disk drive write channel has a differential pair gain circuit for receiving a data input signal and generating a differential output voltage to provide a differential write signal for generating the write current. First and second programmable current sources are connected to the differential pair gain circuit to create a programmable voltage offset of the differential output voltage to programmably adjust the duty cycle of the write current.

摘要翻译： 用于提供在硬盘驱动器写入通道中具有可编程调节占空比的写入电流的电路具有用于接收数据输入信号并产生差分输出电压以提供用于产生写入电流的差分写入信号的差分对增益电路。 第一和第二可编程电流源连接到差分对增益电路以产生差分输出电压的可编程电压偏移，以可编程地调整写入电流的占空比。

公开(公告)号：US5670910A

公开(公告)日：1997-09-23

申请号：US592735

申请日：1996-01-26

申请人： Fumihiko Kato

发明人： Fumihiko Kato

IPC分类号： H03F3/30 ,  H03F3/343 ,  H03F3/45

CPC分类号： H03F3/4508 ,  H03F3/3008 ,  H03F3/3023 ,  H03F3/3027 ,  H03F3/45112 ,  H03F3/45179 ,  H03F3/4521 ,  H03F2203/45091 ,  H03F2203/45188 ,  H03F2203/45658 ,  H03F2203/45676

摘要： An input stage, an error compensable level-shift stage and an output stage form in combination an operational amplifier circuit, and the error compensating level-shift stage includes an inverting transistor coupled to an input node of a current mirror circuit and responsive to an output potential level of the input stage for controlling an output potential level of the current mirror circuit and a constant current source coupled to the output node of the current mirror circuit so as to eliminate influence of unitentional variation of the channel doping level of the inverting transistor from the output potential level at the output node.

摘要翻译： 组合运算放大器电路的输入级，错误可补偿电平移位级和输出级形式，以及误差补偿电平移位级包括耦合到电流镜像电路的输入节点的反相晶体管，并响应于输出 用于控制电流镜电路的输出电位电平的输入级的电位电平和耦合到电流镜电路的输出节点的恒流源，以消除反相晶体管的沟道掺杂电平的单位变化的影响 输出节点的输出电位电平。

公开(公告)号：US4602172A

公开(公告)日：1986-07-22

申请号：US493152

申请日：1983-05-10

申请人： Masafumi Kikuchi

发明人： Masafumi Kikuchi

IPC分类号： H03F1/56 ,  H03F3/34 ,  H03F3/343 ,  H03F3/347 ,  H03F3/45 ,  H03F3/50 ,  H03K5/1534 ,  H03K5/22 ,  H03G3/18 ,  H03L5/00

CPC分类号： H03F3/45112 ,  H03F1/56 ,  H03F3/45085 ,  H03K5/1534

摘要： A high input impedance circuit having a first differential circuit consisting of a pair of NPN transistors and a second differential circuit consisting of a pair of PNP transistors, is disclosed. One input terminal of the first differential circuit is connected to one input terminal of the second differential circuit. The other input terminal of the first differential circuit is connected to the other input terminal of the second differential circuit. A signal is supplied through a capacitor to one input terminal for eliminating a DC component of the signal. A DC biasing circuit for biasing the first and second differential circuits is connected to the other input terminal. First and second current source circuits are connected to the first and second differential circuits respectively.

摘要翻译： 公开了具有由一对NPN晶体管构成的第一差分电路和由一对PNP晶体管组成的第二差分电路的高输入阻抗电路。 第一差分电路的一个输入端子连接到第二差分电路的一个输入端子。 第一差分电路的另一个输入端连接到第二差分电路的另一输入端。 信号通过电容器提供给一个输入端，用于消除信号的直流分量。 用于偏置第一和第二差分电路的直流偏置电路连接到另一个输入端子。 第一和第二电流源电路分别连接到第一和第二差分电路。

公开(公告)号：US4349786A

公开(公告)日：1982-09-14

申请号：US203512

申请日：1980-11-03

申请人： Kenji Yokoyama

发明人： Kenji Yokoyama

IPC分类号： H03F1/26 ,  H03F1/30 ,  H03F1/32 ,  H03F3/45 ,  H03F3/50

CPC分类号： H03F3/45112 ,  H03F3/45556 ,  H03F3/4556 ,  H03F3/505 ,  H03F2203/45612 ,  H03F2203/45702

摘要： A complementary differential amplifier circuit in which a complementary differential amplifier having a first differential pair of first and second bipolar transistors of a first conductivity type and a second differential pair of third and fourth bipolar transistors of a second conductivity type is driven by source-follower circuits comprising a pair of input field effect transistors having their drains coupled together and a pair of source resistors having their first ends connected to the sources of the field effect transistors, respectively, and their second ends coupled together. A first constant voltage source or circuit such as a Zener diode is connected between the drains of the field effect transistors and the emitters of the third and fourth bipolar transistors, while a second constant voltage source or circuit is connected between the emitters of the first and second bipolar transistors and the second ends of the source resistors.

摘要翻译： 一种互补差分放大器电路，其中具有第一导电类型的第一和第二双极晶体管的第一差分对和第二导电类型的第三和第四双极晶体管的第二差分对的互补差分放大器由源极跟随器电路 包括一对输入场效应晶体管，它们的漏极耦合在一起，一对源极电阻的第一端分别连接到场效应晶体管的源极，它们的第二端耦合在一起。 第一恒压源或诸如齐纳二极管的电路连接在场效应晶体管的漏极和第三和第四双极晶体管的发射极之间，而第二恒压源或电路连接在第一和第二双极晶体管的发射极之间， 第二双极晶体管和源极电阻的第二端。

公开(公告)号：US08390379B2

公开(公告)日：2013-03-05

申请号：US12916404

申请日：2010-10-29

申请人： Martijn Fridus Snoeij ,  Margarita Alenina

发明人： Martijn Fridus Snoeij ,  Sergey Alenin

IPC分类号： H03F3/45

CPC分类号： H03F3/45112 ,  H03F2203/45248 ,  H03F2203/45466

摘要： Various apparatuses, methods and systems for boosting an amplifier slew rate are disclosed herein. For example, some embodiments of the present invention provide an apparatus including a pair of inputs connected to a pair of differential input devices in an amplifier, a current source, a first current path connected to the current source, a second current path connected to the current source and to the pair of differential input devices, a switch in the first current path, and a voltage difference signal connected between the pair of inputs and the switch. The voltage difference signal represents the voltage difference between the pair of inputs. The conductance of the switch is inversely proportional to the voltage difference signal.

摘要翻译： 本文公开了用于提高放大器转换速率的各种装置，方法和系统。 例如，本发明的一些实施例提供了一种装置，其包括连接到放大器中的一对差分输入装置的一对输入端，电流源，连接到电流源的第一电流路径，连接到电流源的第二电流路径 电流源和一对差分输入装置，第一电流路径中的开关，以及连接在该对输入和开关之间的电压差信号。 电压差信号表示该对输入之间的电压差。 开关的电导与电压差信号成反比。

公开(公告)号：US20120086509A1

公开(公告)日：2012-04-12

申请号：US12916404

申请日：2010-10-29

申请人： Martijn Fridus Snoeij ,  Sergey Alenin ,  Margarita Alenina

发明人： Martijn Fridus Snoeij ,  Sergey Alenin ,  Margarita Alenina

IPC分类号： H03F3/45

CPC分类号： H03F3/45112 ,  H03F2203/45248 ,  H03F2203/45466

摘要： Various apparatuses, methods and systems for boosting an amplifier slew rate are disclosed herein. For example, some embodiments of the present invention provide an apparatus including a pair of inputs connected to a pair of differential input devices in an amplifier, a current source, a first current path connected to the current source, a second current path connected to the current source and to the pair of differential input devices, a switch in the first current path, and a voltage difference signal connected between the pair of inputs and the switch. The voltage difference signal represents the voltage difference between the pair of inputs. The conductance of the switch is inversely proportional to the voltage difference signal.

摘要翻译： 本文公开了用于提高放大器转换速率的各种装置，方法和系统。 例如，本发明的一些实施例提供了一种装置，其包括连接到放大器中的一对差分输入装置的一对输入端，电流源，连接到电流源的第一电流路径，连接到电流源的第二电流路径 电流源和一对差分输入装置，第一电流路径中的开关和连接在该对输入和开关之间的电压差信号。 电压差信号表示该对输入之间的电压差。 开关的电导与电压差信号成反比。

公开(公告)号：US06268769B1

公开(公告)日：2001-07-31

申请号：US09206613

申请日：1998-12-07

申请人： Atsushi Yamauchi ,  Naoto Yoshioka

发明人： Atsushi Yamauchi ,  Naoto Yoshioka

IPC分类号： H03F345

CPC分类号： H03F3/3076 ,  H03F3/45112

摘要： An operational amplifier includes a differential amplifier stage having positive and negative input terminals formed by a pair of differential amplifier circuits, a current mirror stage having a pair of current mirror circuits coupled to the differential amplifier stage and producing a common output, and a buffer circuit having a current source connected to the common output of the current mirror stage, wherein the buffer circuit includes a plurality of first input transistors and plurality of second input transistors. The buffer circuit has a diamond arrangement formed of a first output transistor, a second output transistor, at least one of the first input transistors, and at least one of the second input transistors.

摘要翻译： 运算放大器包括具有由一对差分放大器电路形成的正和负输入端的差分放大器级，具有耦合到差分放大器级并产生公共输出的一对电流镜电路的电流镜级，以及产生公共输出的缓冲电路 具有连接到电流镜级的公共输出的电流源，其中缓冲电路包括多个第一输入晶体管和多个第二输入晶体管。 缓冲电路具有由第一输出晶体管，第二输出晶体管，至少一个第一输入晶体管和至少一个第二输入晶体管形成的金刚石布置。

公开(公告)号：US5608352A

公开(公告)日：1997-03-04

申请号：US362268

申请日：1994-12-22

申请人： Tetsuro Itakura

发明人： Tetsuro Itakura

IPC分类号： H03F1/32 ,  H03F3/45 ,  H03F3/68

CPC分类号： H03F3/45713 ,  H03F1/3211 ,  H03F3/45098 ,  H03F3/45112 ,  H03F3/45121 ,  H03F3/45183 ,  H03F3/45197 ,  H03F3/4521 ,  H03F3/45219 ,  H03F3/45565 ,  H03F2203/45371

摘要： A differential input circuit includes a first differential pair having first and second transistors for receiving a differential input signal, and for transmitting a differential output signal. A second differential pair includes third and fourth transistors commonly connected to an output of the first differential pair. A differential amplifier circuit includes a third differential pair having fifth and sixth transistors for inputting the differential input signal commonly with the first differential pair for generating a differential amplify signal which is supplied to the second differential pair; so that the potential of an output operating point is set to operate the third and fourth transistors of the second differential pair.

摘要翻译： 差分输入电路包括第一差分对，其具有用于接收差分输入信号的第一和第二晶体管，以及用于发送差分输出信号。 第二差分对包括共同连接到第一差分对的输出的第三和第四晶体管。 差分放大器电路包括具有第五和第六晶体管的第三差分对，所述晶体管用于与所述第一差分对共同地输入所述差分输入信号，以产生提供给所述第二差分对的差分放大信号; 使得输出工作点的电位被设置为操作第二差分对的第三和第四晶体管。

公开(公告)号：US5323120A

公开(公告)日：1994-06-21

申请号：US472

申请日：1993-01-05

申请人： Marc H. Ryat

发明人： Marc H. Ryat

IPC分类号： H03F3/45

CPC分类号： H03F3/45112 ,  H03F3/4521 ,  H03F3/4556 ,  H03F3/45708

摘要： A differential input stage for an operational transconductance amplifier is provided with complementary input transistor pairs. For each pair, a diode dummy load is provided. When the common mode input signal is near the positive or negative supply voltage, one of the pairs turns off. The diode loads act to increase the current through the other pair when this occurs. This results in the provision of a constant transconductance over the entire common mode input range.

摘要翻译： 用于运算跨导放大器的差分输入级具有互补输入晶体管对。 对于每一对，提供二极管虚拟负载。 当共模输入信号接近正或负电源电压时，其中一对关断。 当这种情况发生时，二极管负载起到增加另一对电流的作用。 这导致在整个共模输入范围内提供恒定跨导。

公开(公告)号：US4636743A

公开(公告)日：1987-01-13

申请号：US782690

申请日：1985-10-01

申请人： Gerald M. Cotreau

发明人： Gerald M. Cotreau

IPC分类号： H03F3/30 ,  H03F3/45 ,  H03F3/68

CPC分类号： H03F3/4521 ,  H03F3/3066 ,  H03F3/45094 ,  H03F3/45112 ,  H03F3/45125 ,  H03F3/45224 ,  H03F2203/30048 ,  H03F2203/45258 ,  H03F2203/45366 ,  H03F2203/45392 ,  H03F2203/45656 ,  H03F2203/45674

摘要： The front end of an operational amplifier having an improved slew rate and high gain current output capabilities. The amplifier includes a slew enhancement or large signal stage connected in parallel to a normal front end or small signal stage. The small signal stage supplies a transconductance output which is approximately linearly related to the input until its slew rate limit. The slew enhancement stage is designed to provide slew current when the small signal stage reaches its slew rate limit, thereby providing an increased output current response to an increasing differential input voltage beyond the slew rate of the small signal stage.

摘要翻译： 具有改进的转换速率和高增益电流输出能力的运算放大器的前端。 放大器包括与正常前端或小信号级并联连接的转换增强或大信号级。 小信号级提供跨输出，其与输入近似线性相关，直到其转换速率限制。 该转换增益级设计为当小信号级达到其转换速率极限时提供转换电流，从而为超过小信号级转换速率的差分输入电压提供增加的输出电流响应。