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1. 发明授权

US07084674B1 Differential amplifier with reduced common-mode and method 有权
标题翻译：差分放大器具有降低的共模和方法
公开(公告)号：US07084674B1
公开(公告)日：2006-08-01
申请号：US10919552
申请日：2004-08-16
申请人： David G. Nairn
发明人： David G. Nairn
IPC分类号： H03K5/22
CPC分类号： H03F3/45183 , H03F3/45475 , H03F3/4565 , H03F2200/78 , H03F2203/45072 , H03F2203/45076 , H03F2203/45414 , H03F2203/45648
摘要： A comparator includes a circuit which provides a plurality of common-mode difference signals in response to differential input signals. The circuit provides a common-mode feedback signal in response to the plurality of common-mode difference signals. The common-mode feedback signal is used to drive the common-mode level of an amplifier to a desired value.
摘要翻译：比较器包括响应差分输入信号提供多个共模差分信号的电路。该电路响应于多个共模差分信号提供共模反馈信号。共模反馈信号用于将放大器的共模电平驱动到期望值。

2. 发明申请

US20190140608A1 SINGLE-ENDED INSTRUMENTATION FOLDED CASCODE AMPLIFIER 审中-公开
公开(公告)号：US20190140608A1
公开(公告)日：2019-05-09
申请号：US16098734
申请日：2017-05-03
申请人： HARMAN INTERNATIONAL INDUSTRIES, INCOROPORATED
发明人： Dimitri DANYUK , Todd A. EICHENBAUM
IPC分类号： H03F3/45
CPC分类号： H03F3/45798 , H03F1/3211 , H03F3/45291 , H03F3/45304 , H03F3/45475 , H03F2200/129 , H03F2200/261 , H03F2200/453 , H03F2203/45116 , H03F2203/45138 , H03F2203/45408 , H03F2203/45412 , H03F2203/45414 , H03F2203/45431 , H03F2203/45528
摘要： An instrumentation amplifier configured for providing high common mode rejection and low distortion is described and includes an input differential pair configured to receive a differential input voltage and differential feedback voltage and a folded cascode amplifying stage configured to receive output current mode signals provided from the input differential pair. A current mirror is configured to mirror output current mode signals provided from said folded cascode amplifying stage. An external gain setting configuration may include a resistor feedback network, which includes a first resistor being connected between feedback inputs of said input differential pair, a second resistor between an output terminal of the current mirror and a first feedback input of said input differential pair, a third resistor between a common terminal and a second feedback input of said input differential pair.

3. 发明授权

US5515003A Operational amplifier 失效
标题翻译：运算放大器
公开(公告)号：US5515003A
公开(公告)日：1996-05-07
申请号：US383366
申请日：1995-02-03
申请人： Hiroshi Kimura
发明人： Hiroshi Kimura
IPC分类号： H03F3/45
CPC分类号： H03F3/45179 , H03F3/45183 , H03F3/45192 , H03F3/45654 , H03F3/45708 , H03F3/45717 , H03F2203/45014 , H03F2203/45072 , H03F2203/45078 , H03F2203/45406 , H03F2203/45408 , H03F2203/45414
摘要： This invention discloses a high-slew-rate CMOS operational amplifier. This operational amplifier has a differential input stage formed by first and second transistors of the NMOS type connected together source-to-source and a first constant-current source. The first constant-current source is formed by an NMOS transistor coupled to the sources of the first and second transistors. The gates of third, fourth, and fifth transistors are respectively fed V.sub.in+, V.sub.in-, and the source voltage of the first and second transistors. A second constant-current source, formed by a PMOS transistor, applies a bias current to the sources of the third, fourth, and fifth transistors. In the steady state (i.e., V.sub.in+ =V.sub.in -), all the bias current from the second constant-current source flows into the fifth transistor. As a result, the third and fourth transistors are cut off, whereupon the differential input stage is biased by a given bias-current from the first constant-current source. If V.sub.in+ rises higher than V.sub.in-, this increases the source voltage of the first and second transistors. As a result, the fifth transistor is cut off, and the bias current of the second constant-current source comes to flow into the fourth transistor. A current proportional to the current flowing in the fourth transistor is added by a current mirror circuit of plural NMOS transistors to the current of the first constant-current source, whereupon the bias current of the differential input stage is increased.
摘要翻译：本发明公开了一种高速率CMOS运算放大器。该运算放大器具有由连接在源极到源极和第一恒定电流源的NMOS型的第一和第二晶体管形成的差分输入级。第一恒流源由耦合到第一和第二晶体管的源极的NMOS晶体管形成。第三，第四和第五晶体管的栅极分别馈入Vin +，Vin-和第一和第二晶体管的源极电压。由PMOS晶体管形成的第二恒流源对第三，第四和第五晶体管的源极施加偏置电流。在稳定状态（即Vin + = Vin - ）时，来自第二恒定电流源的所有偏置电流流入第五晶体管。结果，第三和第四晶体管被切断，于是差分输入级被来自第一恒定电流源的给定偏置电流偏置。如果Vin +上升到高于Vin-，则这增加了第一和第二晶体管的源极电压。结果，第五晶体管截止，第二恒流源的偏置电流流入第四晶体管。与在第四晶体管中流动的电流成比例的电流由多个NMOS晶体管的电流镜电路加到第一恒流源的电流，于是差分输入级的偏置电流增加。

4. 发明授权

US08102209B2 CMOS variable gain amplifier 有权
标题翻译： CMOS可变增益放大器
公开(公告)号：US08102209B2
公开(公告)日：2012-01-24
申请号：US12878307
申请日：2010-09-09
申请人： Seunghyun Jang , Kwang-Chun Lee
发明人： Seunghyun Jang , Kwang-Chun Lee
IPC分类号： H03F3/45
CPC分类号： H03G1/0029 , H03F3/45188 , H03F3/4565 , H03F2203/45074 , H03F2203/45082 , H03F2203/45302 , H03F2203/45414 , H03G7/001
摘要： A complementary metal-oxide semiconductor (CMOS) variable gain amplifier includes: a cascode amplifier including a common source field effect transistor and a common gate field effect transistor in a cascode structure; a first current generation unit connected in parallel to a drain of the common gate field effect transistor and configured to vary transconductance of the cascode amplifier; a second current generation unit connected to a common source of the cascode amplifier and configured to control a bias current of the cascode amplifier; a current control unit configured to generate a current control signal for the first and second current generation units; and a load stage connected in series to a drain of the cascode amplifier and configured to output an output current, which is varied by the overall transconductance of the cascode amplifier, as a differential output voltage.
摘要翻译：互补金属氧化物半导体（CMOS）可变增益放大器包括：共源共栅放大器，包括共源极场效应晶体管和共栅型场效应晶体管; 与公共栅极场效应晶体管的漏极并联连接并被配置为改变共源共栅放大器的跨导的第一电流产生单元; 连接到所述共射共基放大器的共同源并被配置为控制所述共源共栅放大器的偏置电流的第二电流产生单元; 电流控制单元，被配置为产生用于所述第一和第二电流产生单元的电流控制信号; 以及与串联放大器的漏极串联连接的负载级，其被配置为输出由串联放大器的整个跨导变化的输出电流作为差分输出电压。

5. 发明申请

US20110063030A1 CMOS VARIABLE GAIN AMPLIFIER 有权
标题翻译： CMOS可变增益放大器
公开(公告)号：US20110063030A1
公开(公告)日：2011-03-17
申请号：US12878307
申请日：2010-09-09
申请人： Seunghyun JANG , Kwang-Chun Lee
发明人： Seunghyun JANG , Kwang-Chun Lee
IPC分类号： H03G3/30 , H03F3/45 , H03F1/22
CPC分类号： H03G1/0029 , H03F3/45188 , H03F3/4565 , H03F2203/45074 , H03F2203/45082 , H03F2203/45302 , H03F2203/45414 , H03G7/001
摘要： A complementary metal-oxide semiconductor (CMOS) variable gain amplifier includes: a cascode amplifier including a common source field effect transistor and a common gate field effect transistor in a cascode structure; a first current generation unit connected in parallel to a drain of the common gate field effect transistor and configured to vary transconductance of the cascode amplifier; a second current generation unit connected to a common source of the cascode amplifier and configured to control a bias current of the cascode amplifier; a current control unit configured to generate a current control signal for the first and second current generation units; and a load stage connected in series to a drain of the cascode amplifier and configured to output an output current, which is varied by the overall transconductance of the cascode amplifier, as a differential output voltage.
摘要翻译：互补金属氧化物半导体（CMOS）可变增益放大器包括：共源共栅放大器，包括共源极场效应晶体管和共栅型场效应晶体管; 与公共栅极场效应晶体管的漏极并联连接并被配置为改变共源共栅放大器的跨导的第一电流产生单元; 连接到所述共射共基放大器的共同源并被配置为控制所述共源共栅放大器的偏置电流的第二电流产生单元; 电流控制单元，被配置为产生用于所述第一和第二电流产生单元的电流控制信号; 以及与串联放大器的漏极串联连接的负载级，其被配置为输出由串联放大器的整个跨导变化的输出电流作为差分输出电压。

6. 发明授权

US4737732A Low voltage operational amplifier having a substantially full range output voltage 失效
标题翻译：低电压运算放大器具有基本上全范围的输出电压
公开(公告)号：US4737732A
公开(公告)日：1988-04-12
申请号：US18310
申请日：1987-02-24
申请人： Alan L. Westwick
发明人： Alan L. Westwick
IPC分类号： H03F3/30 , H03F3/45 , H04M19/00
CPC分类号： H04M19/001 , H03F3/3028 , H03F3/4565 , H03F2200/153 , H03F2203/45402 , H03F2203/45414 , H03F2203/45658
摘要： A power amplifier particularly useful as a line driver operating at low power supply voltages is provided. An input portion comprising a differential input configuration is coupled to an output stage having a P-channel MOS transistor connected in series with an N-channel MOS transistor between two power supply voltage terminals. A control portion is coupled to both the input portion and the output stage for providing first and second control signals to the output portion. The control portion regulates the output quiescent current at a predetermined value independent of signal amplification provided by the input portion. The output signal can swing substantially between two power supply voltage potentials.
摘要翻译：提供了特别用作在低电源电压下工作的线路驱动器的功率放大器。包括差分输入配置的输入部分耦合到具有与两个电源电压端子之间的N沟道MOS晶体管串联连接的P沟道MOS晶体管的输出级。控制部分耦合到输入部分和输出级两端，以向输出部分提供第一和第二控制信号。控制部分以与输入部分提供的信号放大无关的预定值来调节输出静态电流。输出信号可以在两个电源电压电位之间大幅摆动。

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