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1. 发明公开

CN1318899A 运算放大器的倒相保护无效
公开(公告)号：CN1318899A
公开(公告)日：2001-10-24
申请号：CN01112142.4
申请日：2001-03-29
申请人：密克罗奇普技术公司
发明人：吉姆·诺兰
IPC分类号： H03F3/45 , H03F1/52
CPC分类号： H03F3/4508 , H03F1/52 , H03F3/45179 , H03F3/45291 , H03F2200/444 , H03F2203/45304
摘要：一种集成电路运算放大器,保护其防止因输入电压电平引起运算放大器输出倒相。电压比较器监测输入到运算放大器成对差动输入晶体管的输入电压。运算放大器和比较器可以制作在一集成电路基板上并封装在一个集成电路块中。当输入电压值引起输出倒相时,比较器将其检测出来,并使其耦合到防止运算放大器输出电压倒相的运算放大器电路中。

2. 发明公开

CN103270465A 用于过程变化和电源调制的准确偏置跟踪失效
公开(公告)号：CN103270465A
公开(公告)日：2013-08-28
申请号：CN201180062253.6
申请日：2011-12-20
申请人：马维尔国际贸易有限公司
发明人： P·B·伦格 , N·K·K·玛尼姆
IPC分类号： G05F3/26 , H03F1/32
CPC分类号： H03F3/16 , G05F3/262 , H03F3/193 , H03F3/245 , H03F3/45179 , H03F2200/555 , H03F2203/45294 , H03F2203/45301 , H03F2203/45304 , H03F2203/45311 , H03F2203/45352 , H03F2203/45544 , H03F2203/45554
摘要：一种电流镜包括偏置支路，偏置支路包括：在电压源与接地之间串联的第一晶体管和第二晶体管；在电压源与接地之间耦合的分压器；以及运算放大器，被配置为接收分压器的分压电压和在第一晶体管与第二晶体管之间的节点的电压，并且驱动第二晶体管的栅极以将节点拉向分压电压。该电流镜还包括耦合到偏置支路的功率放大器核心。功率放大器核心包括在电压源与接地之间串联配置的第一驱动晶体管和第二驱动晶体管。耦合第一晶体管和第一驱动晶体管的栅极，并且耦合第二晶体管和第二驱动晶体管的栅极。

3. 发明授权

CN103270465B 用于过程变化和电源调制的准确偏置跟踪失效
公开(公告)号：CN103270465B
公开(公告)日：2016-07-20
申请号：CN201180062253.6
申请日：2011-12-20
申请人：马维尔国际贸易有限公司
发明人： P·B·伦格 , N·K·K·玛尼姆
IPC分类号： G05F3/26 , H03F1/32
CPC分类号： H03F3/16 , G05F3/262 , H03F3/193 , H03F3/245 , H03F3/45179 , H03F2200/555 , H03F2203/45294 , H03F2203/45301 , H03F2203/45304 , H03F2203/45311 , H03F2203/45352 , H03F2203/45544 , H03F2203/45554
摘要：一种电流镜包括偏置支路，偏置支路包括：在电压源与接地之间串联的第一晶体管和第二晶体管；在电压源与接地之间耦合的分压器；以及运算放大器，被配置为接收分压器的分压电压和在第一晶体管与第二晶体管之间的节点的电压，并且驱动第二晶体管的栅极以将节点拉向分压电压。该电流镜还包括耦合到偏置支路的功率放大器核心。功率放大器核心包括在电压源与接地之间串联配置的第一驱动晶体管和第二驱动晶体管。耦合第一晶体管和第一驱动晶体管的栅极，并且耦合第二晶体管和第二驱动晶体管的栅极。

4. 发明申请

WO2012085685A8 ACCURATE BIAS TRACKING FOR PROCESS VARIATION AND SUPPLY MODULATION 审中-公开
标题翻译：用于过程变化和供应调制的精确偏差跟踪
公开(公告)号：WO2012085685A8
公开(公告)日：2013-06-27
申请号：PCT/IB2011003331
申请日：2011-12-20
申请人： MARVELL WORLD TRADE LTD , LEONG POH BOON , MANIAM NUNTHA KUMAR KRISHNASAMY
发明人： LEONG POH BOON , MANIAM NUNTHA KUMAR KRISHNASAMY
IPC分类号： G05F3/26 , H03F1/32
CPC分类号： H03F3/16 , G05F3/262 , H03F3/193 , H03F3/245 , H03F3/45179 , H03F2200/555 , H03F2203/45294 , H03F2203/45301 , H03F2203/45304 , H03F2203/45311 , H03F2203/45352 , H03F2203/45544 , H03F2203/45554
摘要： A current mirror includes a bias branch, which includes first and second transistors in series between a voltage source and ground, a voltage divider coupled between the voltage source and ground, an op-amp configured to receive a divided voltage of the voltage divider and a voltage of a node between the first and second transistors, and drive a gate of the second transistor to pull the node to the divided voltage. The current mirror further includes a power amplifier core coupled to the bias branch. The power amplifier core includes first and second drive transistors configured in series between the voltage source and ground. Gates of the first transistor and the first drive transistor are coupled, and gates of the second transistor and the second drive transistor are coupled.
摘要翻译：电流镜包括偏置分支，偏置分支包括串联在电压源和地之间的第一和第二晶体管，耦合在电压源和地之间的分压器，被配置为接收分压器的分压的运算放大器和在第一和第二晶体管之间的节点的电压，并且驱动第二晶体管的栅极以将节点拉到分压。电流镜还包括耦合到偏压分支的功率放大器芯。功率放大器芯包括串联在电压源和地之间的第一和第二驱动晶体管。第一晶体管和第一驱动晶体管的栅极耦合，并且第二晶体管和第二驱动晶体管的栅极耦合。

5. 发明申请

WO9857430A3 A gm-C CELL WITH TWO-STAGE COMMON MODE CONTROL AND CURRENT BOOST 审中-公开
标题翻译：具有两级共通模式控制和电流升压的gm-C电池
公开(公告)号：WO9857430A3
公开(公告)日：1999-04-01
申请号：PCT/IB9800851
申请日：1998-06-02
申请人： KONINKL PHILIPS ELECTRONICS NV , PHILIPS SVENSKA AB
发明人： ESCHAUZIER RUDOLPHE G
IPC分类号： H03F3/45 , H03H11/04 , H03H11/02
CPC分类号： H03F3/45278 , H03F3/45479 , H03F3/45659 , H03F2203/45304 , H03F2203/45394 , H03F2203/45402 , H03F2203/45418 , H03F2203/45424 , H03F2203/45631 , H03F2203/45646 , H03F2203/45652 , H03H11/0433
摘要： A gm-C circuit includes a two-stage common mode control loop to limit the common mode voltage during circuit operation. To prevent latch-up in a cross-coupled differential gm-C type filter, the common mode control loop includes a circuit which provides extra current capability to the common-mode control loop without increasing the quiescent current. This is accomplished by a current boost technique that provides large amounts of current when needed, while running in a low current mode under normal circumstances.
摘要翻译： gm-C电路包括两级共模控制回路，以限制电路运行期间的共模电压。为了防止交叉耦合的差分gm-C型滤波器中的闩锁，共模控制回路包括一个电路，可以在不增加静态电流的情况下向共模控制环路提供额外的电流能力。这是通过当前的升压技术实现的，当技术在正常情况下以低电流模式运行时，需要时提供大量的电流。

6. 发明授权

US09673758B2 Differential amplifier circuit 有权
公开(公告)号：US09673758B2
公开(公告)日：2017-06-06
申请号：US14963904
申请日：2015-12-09
申请人： SK hynix Inc.
发明人： Kyoung-Han Kwon
IPC分类号： H03F3/45 , H03F3/72 , H03F1/02
CPC分类号： H03F1/0205 , H03F1/223 , H03F3/45188 , H03F3/45264 , H03F3/45269 , H03F3/72 , H03F2203/45091 , H03F2203/45304 , H03F2203/45318 , H03F2203/45481 , H03F2203/45644 , H03F2203/45726 , H03F2203/7215
摘要： A differential amplification circuit may include a differential amplification unit including a first input transistor and a second input transistor, and suitable for differentially amplifying input signals inputted through the first and second input transistors; a first input control section suitable for turning off the first input transistor when the differential amplification circuit is disabled and transferring a first input signal to the first input transistor when the differential amplification circuit is enabled; and a second input control section suitable for turning off the second input transistor when the differential amplification circuit is disabled and transferring a second input signal to the second input transistor when the differential amplification circuit is enabled.

7. 发明授权

US06781445B2 Low power large signal RF tuned buffer amplifier 失效
标题翻译：低功耗大信号RF调谐缓冲放大器
公开(公告)号：US06781445B2
公开(公告)日：2004-08-24
申请号：US09835021
申请日：2001-04-13
申请人： Arnold R. Feldman
发明人： Arnold R. Feldman
IPC分类号： H03F3193
CPC分类号： H03F3/45179 , H03F1/226 , H03F2200/372 , H03F2203/45304 , H03F2203/45394 , H03F2203/45542 , H03F2203/45644 , H03F2203/45714
摘要： Methods and apparatus for buffering RF signals. A method includes receiving an input signal, wherein the input signal alternates between a first polarity and a second polarity. From the input signal, a first current is generated, wherein the first current is proportional to the input signal when the input signal has the first polarity, and approximately equal to zero when the input signal has the second polarity, and a second current is generated, wherein the second current is proportional to the input signal when the input signal has the second polarity, and approximately equal to zero when the input signal has the first polarity. A third current is generated proportional to the first current, and a fourth current is generated proportional to the second current. The first and fourth currents are applied to a first terminal of an inductor; and the second and third currents are applied to a second terminal of the inductor.
摘要翻译：用于缓冲RF信号的方法和装置。一种方法包括接收输入信号，其中输入信号在第一极性和第二极性之间交替。从输入信号，产生第一电流，其中当输入信号具有第一极性时，第一电流与输入信号成比例，并且当输入信号具有第二极性时大致等于零，并且产生第二电流，其中当输入信号具有第二极性时，第二电流与输入信号成比例，并且当输入信号具有第一极性时，其大致等于零。与第一电流成比例地产生第三电流，并且与第二电流成比例地产生第四电流。第一和第四电流被施加到电感器的第一端子; 并且第二和第三电流被施加到电感器的第二端子。

8. 发明授权

US5917379A Broadband linear transconductance amplifier with resistive pole-splitting compensation 失效
标题翻译：宽带线性跨导放大器，具有电阻分支补偿
公开(公告)号：US5917379A
公开(公告)日：1999-06-29
申请号：US903012
申请日：1997-07-31
申请人： Kirk B Ashby , Paul C. Davis
发明人： Kirk B Ashby , Paul C. Davis
IPC分类号： H03F3/45
CPC分类号： H03F3/4508 , H03F3/45179 , H03F3/45278 , H03F3/45286 , H03F3/45304 , H03F2203/45184 , H03F2203/45298 , H03F2203/45304 , H03F2203/45466 , H03F2203/45471 , H03F2203/45496
摘要： A compensation scheme for differential- or single-input transconductance amplifiers relies on an active feedback path with a resistive pole-splitting compensation circuit. The resistive compensation circuit causes pole-splitting of the two dominant poles, moving one pole to a slightly lower frequency and the other to a much higher frequency compared to the dominant poles of the uncompensated amplifier. A DC-blocking capacitor may also be placed in series with the resistor of the compensation circuit to allow for proper biasing of the circuit. By selecting appropriate values for the passive elements in the compensation circuit, the compensation scheme of the present invention can cause the amplifier to operate in a stable, linear manner over the same or even a larger bandwidth than an equivalent amplifier without compensation. The present invention does not suffer the problems of standard narrowbanding compensation schemes associated with high frequency cut-off.
摘要翻译：差分或单输入跨导放大器的补偿方案依赖于具有电阻分极补偿电路的有源反馈路径。电阻补偿电路引起两个主极的极分裂，将一极移动到稍低的频率，另一个极点与未补偿放大器的主极相比更高的频率。隔离电容器也可以与补偿电路的电阻串联放置，以允许电路的适当偏置。通过为补偿电路中的无源元件选择合适的值，本发明的补偿方案可以使得放大器在与补偿相等或甚至更大的带宽相同或甚至更大的带宽上以稳定的线性方式工作。本发明不存在与高频截止相关的标准窄带补偿方案的问题。

9. 发明授权

US5912582A BiCMOS transconductor stage for high-frequency filters 失效
标题翻译： BiCMOS跨导级高频滤波器
公开(公告)号：US5912582A
公开(公告)日：1999-06-15
申请号：US866889
申请日：1997-05-30
申请人： Valerio Pisati , Roberto Alini , Gaetano Cosentino , Gianfranco Vai
发明人： Valerio Pisati , Roberto Alini , Gaetano Cosentino , Gianfranco Vai
IPC分类号： H03F3/45 , H03F3/72 , H03B1/00 , H03K5/00 , H04B1/10
CPC分类号： H03F3/72 , H03F3/45286 , H03F2203/45302 , H03F2203/45304 , H03F2203/45371 , H03F2203/45396 , H03F2203/45506
摘要： A BiCMOS transconductor differential stage for high frequency filters includes an input circuit portion having signal inputs and a pair of MOS transistors having their respective gate terminals corresponding to the signal inputs. The differential stage has an output circuit portion having signal outputs and a pair of bipolar transistors connected together with a common base inserted between the inputs and the outputs in a cascode configuration. The differential stage includes a switching device associated with at least one of the bipolar transistors to change the connections between parasitic capacitors present in the differential stage. The switching device also has at least one added bipolar transistor connected in a removable manner in parallel with the corresponding bipolar cascode transistor. In a variant differential stage, there are also provided respective added MOS transistors connected in parallel with the MOS transistors of the input circuit portion to change the ratio W:L of each of the MOS transistors.
摘要翻译：用于高频滤波器的BiCMOS跨导差分级包括具有信号输入的输入电路部分和具有对应于信号输入的各自的栅极端子的一对MOS晶体管。差分级具有具有信号输出的输出电路部分和一对双极晶体管，它们以共模基极连接在共模基底上，该公共基极以共源共栅配置插入在输入端和输出端之间。差分级包括与双极晶体管中的至少一个相关联的开关器件，以改变差分级中存在的寄生电容器之间的连接。开关器件还具有至少一个加法双极晶体管，其以可移除的方式与相应的双极共源共栅晶体管并联连接。在变异差分级中，还提供了与输入电路部分的MOS晶体管并联连接的各个附加的MOS晶体管，以改变每个MOS晶体管的比率W：L。

10. 发明授权

US08933754B2 Linear differential amplifier with high input impedance 有权
标题翻译：具有高输入阻抗的线性差分放大器
公开(公告)号：US08933754B2
公开(公告)日：2015-01-13
申请号：US13809299
申请日：2011-05-18
申请人： Oliver Landolt
发明人： Oliver Landolt
IPC分类号： H03F3/45 , H03F1/32 , H03F1/48
CPC分类号： H03F3/4508 , H03F1/3211 , H03F1/48 , H03F1/483 , H03F3/45085 , H03F3/45183 , H03F2203/45302 , H03F2203/45304 , H03F2203/45318 , H03F2203/45392
摘要： A differential amplifier provides an amplifier circuit including two differential pairs. A first differential pair is connected in series to a second differential pair. The second differential pair is connected in a crosswise manner at least indirectly to a differential output signal of the first differential pair. The first differential pair and the second differential pair form a first differential current path and a second differential current path. A first emulation device is connected in parallel to the first current path. A second emulation device is connected in parallel to the second current path.
摘要翻译：差分放大器提供包括两个差分对的放大器电路。第一差分对与第二差分对串联。第二差分对至少间接地以交叉方式连接到第一差分对的差分输出信号。第一差分对和第二差分对形成第一差分电流路径和第二差分电流路径。第一仿真装置与第一电流路径并联连接。第二仿真装置与第二电流路径并联连接。

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