公开(公告)号：US06734720B2

公开(公告)日：2004-05-11

申请号：US10223702

申请日：2002-08-20

申请人： Hiroshi Imai ,  Takeshi Miki

发明人： Hiroshi Imai ,  Takeshi Miki

IPC分类号： H03F345

CPC分类号： H03F3/45094 ,  H03F3/3066 ,  H03F2203/30057 ,  H03F2203/30063 ,  H03F2203/30078 ,  H03F2203/30111 ,  H03F2203/45352 ,  H03F2203/45594 ,  H03F2203/45651 ,  H03F2203/45702

摘要： A high slew rate operational amplifier circuit of which the through current of its push-pull transistors is substantially zero is disclosed. The operational amplifier circuit preferably comprises an amplifier portion and a push-pull output amplifier including NPN and PNP output transistors. The output of the amplifier portion is transferred to the NPN output transistors base through a PNP driving transistor and to the PNP output transistors base through an NPN driving transistor. The emitters of the driving transistors are connected to respective power supply conductors through respective current sources. The through current reduction is achieved by resistors inserted between the current sources and the corresponding power supply conductors, an NPN transistor so connected with the NPN output transistor as to constitute a current mirror and a PNP transistor so connected with the PNP output transistor as to constitute another current mirror.

摘要翻译： 公开了其推挽晶体管的通流大致为零的高压摆率运算放大器电路。 运算放大器电路优选地包括放大器部分和包括NPN和PNP输出晶体管的推挽输出放大器。 放大器部分的输出通过PNP驱动晶体管传输到NPN输出晶体管基极，并通过NPN驱动晶体管传输到PNP输出晶体管基极。 驱动晶体管的发射极通过各自的电流源连接到相应的电源导体。 直流电流的降低由插入在电流源和相应的电源导体之间的电阻器实现，NPN晶体管与NPN输出晶体管连接以构成电流镜，以及与PNP输出晶体管连接的PNP晶体管构成 另一个电流镜。

公开(公告)号：US06566949B1

公开(公告)日：2003-05-20

申请号：US09653004

申请日：2000-08-31

申请人： Joshua C. Park

发明人： Joshua C. Park

IPC分类号： H03F345

CPC分类号： H03F3/45179 ,  H03F3/45286 ,  H03F2200/153 ,  H03F2203/45304 ,  H03F2203/45352 ,  H03F2203/45392 ,  H03F2203/45544 ,  H03F2203/45566 ,  H03F2203/45631 ,  H03F2203/45651

摘要： A transconductance amplifier and method for improving the phase response and linearity. A differential amplifier circuit receives differential signals for amplification on respective bases of input bipolar transistors. The transistors amplify a small signal received on the based connections to produce an amplified output current. The differential amplifier circuit is connected to load impedances which form a cascode transconductance amplifier output stage. Feedback transistors provide a feedback voltage from the emitters of each of the different bipolar transistors to the base, improving the linearity of the differential amplifier. Phase compensation is provided by cross coupling through first and second capacitors a portion of each individual differential signal component to the base connections of the differential amplifier input transistor.

摘要翻译： 一种用于提高相位响应和线性度的跨导放大器和方法。 差分放大器电路在输入双极晶体管的各个基极上接收用于放大的差分信号。 晶体管放大基于连接的接收的小信号以产生放大的输出电流。 差分放大器电路连接到形成共源共栅跨导放大器输出级的负载阻抗。 反馈晶体管提供从每个不同双极晶体管的发射极到基极的反馈电压，从而改善差分放大器的线性度。 相位补偿通过第一和第二电容器将每个单独差分信号分量的一部分交叉耦合到差分放大器输入晶体管的基极连接来提供。

公开(公告)号：US20020175756A1

公开(公告)日：2002-11-28

申请号：US09865863

申请日：2001-05-25

发明人： Sasan Cyrusian

IPC分类号： H03F003/45

CPC分类号： H03G1/0088 ,  H03F3/45188 ,  H03F3/45659 ,  H03F2203/45392 ,  H03F2203/45396 ,  H03F2203/45651 ,  H03G1/0029

摘要： A switching Gm cell allowing a wide transconductance range with a limited voltage range. The Gm cell includes a plurality of Gm setting devices, the operation of which is controlled by a Gm setting code. The Gm setting code is inputted into a switching circuit which turns on and off at least one of said Gm setting devices. Thus, coarse adjustments of the overall transconductance of the cell may be adjusted by changing the Gm setting code and fine adjustments may be made by utilizing the conventional method of adjusting a tuning voltage.

摘要翻译： 开关Gm单元允许在有限电压范围内的宽跨导范围。 Gm单元包括多个Gm设置设备，其操作由Gm设置代码控制。 Gm设定码被输入到切换电路，其切换至少一个所述Gm设定装置。 因此，可以通过改变Gm设置代码来调整单元的整个跨导的粗调，并且可以通过利用调整调谐电压的常规方法进行微调。

公开(公告)号：US06480064B1

公开(公告)日：2002-11-12

申请号：US09865863

申请日：2001-05-25

申请人： Sasan Cyrusian

发明人： Sasan Cyrusian

IPC分类号： H03F345

CPC分类号： H03G1/0088 ,  H03F3/45188 ,  H03F3/45659 ,  H03F2203/45392 ,  H03F2203/45396 ,  H03F2203/45651 ,  H03G1/0029

摘要： A switching Gm cell allowing a wide transconductance range with a limited voltage range. The Gm cell includes a plurality of Gm setting devices, the operation of which is controlled by a Gm setting code. The Gm setting code is inputted into a switching circuit which turns on and off at least one of said Gm setting devices. Thus, coarse adjustments of the overall transconductance of the cell may be adjusted by changing the Gm setting code and fine adjustments may be made by utilizing the conventional method of adjusting a tuning voltage.

摘要翻译： 开关Gm单元允许在有限电压范围内的宽跨导范围。 Gm单元包括多个Gm设置设备，其操作由Gm设置代码控制。 Gm设定码被输入到切换电路，其切换至少一个所述Gm设定装置。 因此，可以通过改变Gm设置代码来调整单元的整个跨导的粗调，并且可以通过利用调整调谐电压的常规方法进行微调。

公开(公告)号：US06476675B1

公开(公告)日：2002-11-05

申请号：US09747470

申请日：2000-12-20

申请人： Runhua Sun

发明人： Runhua Sun

IPC分类号： H03F345

CPC分类号： H03F3/45188 ,  H03F2203/45526 ,  H03F2203/45631 ,  H03F2203/45651 ,  H03F2203/45652

摘要： A two-stage op-amp circuit including a double-cascode telescopic op-amp circuit in the input stage and a fully-differential op-amp circuit in the output stage and having very high open-loop DC gain, very high unity-gain frequency, and relatively very low power consumption is presented. The input stage op-amp circuit and the output stage op-amp circuit are each comprised of a plurality of electrically connected MOSFET's. The input stage op-amp circuit provides very high gain, high input resistance, and large common mode rejection. The output stage op-amp circuit provides gain, low output resistance, and minimal output loss.

摘要翻译： 一个两级运算放大器电路，包括输入级中的双共源共模放大运算放大器电路和输出级中的全差分运算放大器电路，具有非常高的开环直流增益，非常高的单位增益 频率和相对非常低的功耗。 输入级运算放大器电路和输出级运算放大器电路各自由多个电连接的MOSFET组成。 输入级运算放大器电路提供非常高的增益，高输入电阻和大的共模抑制。 输出级运算放大器电路提供增益，低输出电阻和最小的输出损耗。

公开(公告)号：US20020158691A1

公开(公告)日：2002-10-31

申请号：US10109633

申请日：2002-04-01

发明人： Tim Blankenship ,  Stephen Bily

IPC分类号： H03F003/45

CPC分类号： H03F3/45192 ,  G09G3/3614 ,  G09G2310/027 ,  G09G2310/0297 ,  H03F3/45183 ,  H03F2203/45648 ,  H03F2203/45651

摘要： An apparatus for enhancing the slew rate of a differential amplifier capable of producing an output voltage and including a load stage, includes: a gain enhancement stage coupled to the load stage; a current comparator coupled to the differential amplifier and capable to compare a reference current value with a comparison current value; and a current mirror coupled to the current comparator and to the differential amplifier and capable to generate a slew rate enhancement bias current to enhance the slew rate of the output voltage when the comparison current value is greater the reference current value.

摘要翻译： 一种用于增强能够产生输出电压并包括负载级的差分放大器的转换速率的装置，包括：耦合到负载级的增益增强级; 电流比较器，其耦合到所述差分放大器并且能够将参考电流值与比较电流值进行比较; 以及耦合到电流比较器和差分放大器并且当比较电流值大于参考电流值时能产生压摆率增强偏置电流以增强输出电压的转换速率的电流镜。

公开(公告)号：US20020154044A1

公开(公告)日：2002-10-24

申请号：US10109634

申请日：2002-04-01

发明人： Tim Blankenship ,  Stephen Bily

IPC分类号： H03M001/00 ,  H03M001/66

CPC分类号： H03M1/68 ,  G09G3/3614 ,  G09G2310/027 ,  G09G2310/0289 ,  G09G2310/0297 ,  H03F3/45183 ,  H03F2203/45648 ,  H03F2203/45651 ,  H03K17/693 ,  H03M1/76 ,  H03M1/765

摘要： A digital-to-analog converter is disclosed, which includes a decoder stage having a decoder output capable of receiving input data, a level shifter stage coupled to the decoder output capable of shifting the level of the decoder output, an output stage communicatively coupled to the level shifter stage capable of responding based upon an output value of the level shifter stage, and a current mirror communicatively coupled to the level shifter and capable to shift the level of the decoder output, and further includes an output stage having switches, which are selectively turned on by an output signal from the decoder stage thus outputting a reference voltage.

摘要翻译： 公开了一种数模转换器，其包括具有能够接收输入数据的解码器输出的解码器级，耦合到能够移位解码器输出电平的解码器输出的电平移位器级，通信耦合到 能够根据电平移位器级的输出值进行响应的电平移位器级以及通信地耦合到电平移位器并且能够移位译码器输出电平的电流镜，还包括具有开关的输出级 通过来自解码器级的输出信号选择性地导通，从而输出参考电压。

公开(公告)号：US06396351B1

公开(公告)日：2002-05-28

申请号：US09777235

申请日：2001-02-05

申请人： Kevin Scott Buescher ,  James Harold Lauffenburger ,  John William Arachtingi

发明人： Kevin Scott Buescher ,  James Harold Lauffenburger ,  John William Arachtingi

IPC分类号： H03F308

CPC分类号： H03G1/0088 ,  H03F3/3023 ,  H03F3/45183 ,  H03F2203/30054 ,  H03F2203/30151 ,  H03F2203/30156 ,  H03F2203/45651 ,  H03F2203/45658 ,  H03F2203/7236 ,  H03G1/0023

摘要： An amplifier circuit (20) for a photodetector includes a transconductance variable gain stage (32). The transconductance variable gain stage (32) has an input (34) capable of connecting to the photodetector and an output (40). A transconductance gain stage (44) has an input (42) connected to the output (40) of the transconductance variable gain stage (32). A feedback resistor (46) is connected between an output (48) of the transconductance gain stage (44) and the input (42) of the transconductance gain stage (44).

摘要翻译： 用于光电检测器的放大器电路（20）包括跨导可变增益级（32）。 跨导可变增益级（32）具有能够连接到光电检测器的输入端（34）和输出端（40）。 跨导增益级（44）具有连接到跨导可变增益级（32）的输出（40）的输入（42）。 反馈电阻（46）连接在跨导增益级（44）的输出（48）和跨导增益级（44）的输入端（42）之间。

公开(公告)号：US06307430B1

公开(公告)日：2001-10-23

申请号：US09678166

申请日：2000-10-02

申请人： Axel Thomsen ,  Murari Kejariwal ,  Prasad Ammisetti

发明人： Axel Thomsen ,  Murari Kejariwal ,  Prasad Ammisetti

IPC分类号： H03F102

CPC分类号： H03F3/38 ,  H03F3/45192 ,  H03F3/4565 ,  H03F3/45739 ,  H03F3/45775 ,  H03F2203/45356 ,  H03F2203/45631 ,  H03F2203/45651 ,  H03F2203/45682

摘要： Disclosed is a chopper-stabilized amplifier with current steering used as output switching and to be operated in a low power supply voltage environment.

摘要翻译： 公开了一种具有电流转向的斩波稳定放大器，用作输出开关并在低电源电压环境中工作。

公开(公告)号：US5864257A

公开(公告)日：1999-01-26

申请号：US892399

申请日：1997-07-15

申请人： Bret C. Rothenberg

发明人： Bret C. Rothenberg

IPC分类号： H03F3/45

CPC分类号： H03F3/45188 ,  H03F3/4565 ,  H03F2203/45421 ,  H03F2203/45508 ,  H03F2203/45651 ,  H03F2203/45732

摘要： A replica circuit derived from the bias generating circuit for an amplifier. The replica circuit duplicates the operating point of the op-amp transistors, and generates two reference voltages. The average of these two voltages is the optimum common-mode desired output level to maximize differential op-amp swing. Several circuits are disclosed that make use of these two voltages to set the op-amp output to the average of the two voltages.

摘要翻译： 源自用于放大器的偏置产生电路的复制电路。 复制电路复制运算放大器晶体管的工作点，并产生两个参考电压。 这两个电压的平均值是最佳共模期望输出电平，以最大化差分运算放大器摆幅。 公开了使用这两个电压来将运算放大器输出设置为两个电压的平均值的几个电路。