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1. 发明申请

US20110025655A1 OPERATIONAL AMPLIFIER AND SEMICONDUCTOR DEVICE USING THE SAME 审中-公开
标题翻译：操作放大器和使用相同的半导体器件
公开(公告)号：US20110025655A1
公开(公告)日：2011-02-03
申请号：US12847664
申请日：2010-07-30
申请人： Kouichi Nishimura , Atsushi Shimatani , Hiromichi Ohtsuka
发明人： Kouichi Nishimura , Atsushi Shimatani , Hiromichi Ohtsuka
IPC分类号： H03F3/45 , G06F3/038
CPC分类号： H03F3/505 , G09G3/3688 , H03F3/3022 , H03F3/45219 , H03F3/45475 , H03F2203/45138 , H03F2203/45302 , H03F2203/45311 , H03F2203/45396 , H03F2203/45631 , H03F2203/45722 , H03F2203/5031
摘要： An operational amplifier is provide with: a first MOS transistor pair connected to a non-inverting input terminal and an inverting input terminal; an intermediate stage connected to the first MOS transistor pair connected to the first MOS transistor pair; a first output transistor having a drain connected to an output terminal; and a first source follower. The first source follower is inserted between a gate of the first output transistor and a first output node of the intermediate stage.
摘要翻译：运算放大器提供：连接到非反相输入端和反相输入端的第一MOS晶体管对; 连接到连接到第一MOS晶体管对的第一MOS晶体管对的中间级; 第一输出晶体管，其漏极连接到输出端子; 和第一源跟随器。第一源极跟随器被插入在第一输出晶体管的栅极和中间级的第一输出节点之间。

2. 发明授权

US07821296B2 Stacked buffers 有权
标题翻译：堆叠缓冲区
公开(公告)号：US07821296B2
公开(公告)日：2010-10-26
申请号：US11498994
申请日：2006-08-04
申请人： Lawrence A. Singer , Ronald A. Kapusta, Jr.
发明人： Lawrence A. Singer , Ronald A. Kapusta, Jr.
IPC分类号： H03K19/094
CPC分类号： H03F1/0283 , H03F3/505 , H03F2200/24 , H03F2200/421 , H03F2200/453 , H03F2200/456 , H03F2203/5027 , H03F2203/5031 , H03F2203/5036
摘要： Two or more buffers may configured and arranged such that a quiescent current that flows through and biases a first buffer also flows through and biases a second buffer. The first and second buffers may, for example, be source followers used as reference buffers that drive inputs of a switched-capacitor circuit.
摘要翻译：可以配置和布置两个或更多个缓冲器，使得流过并偏压第一缓冲器的静态电流也流过并偏压第二缓冲器。第一和第二缓冲器可以例如是用作驱动开关电容器电路的输入的参考缓冲器的源极跟随器。

3. 发明授权

US07791410B2 Method and system for FET-based amplifier circuits 有权
标题翻译：基于FET的放大器电路的方法和系统
公开(公告)号：US07791410B2
公开(公告)日：2010-09-07
申请号：US12260925
申请日：2008-10-29
申请人： Boris Murmann , Jason C. Hu
发明人： Boris Murmann , Jason C. Hu
IPC分类号： H03F1/02
CPC分类号： H03F3/505 , H03F2203/5021 , H03F2203/5031 , H03F2203/5039
摘要： Amplifier circuits and methods are implemented using a variety of different embodiments. According to one such embodiment, a method is implemented using a field-effect transistor (FET) having a gate node, a source node and a drain node. A first circuit state is implemented in which the gate node, the source node and the drain node are connected to inputs that generate a stored charge at the gate node, the amount of stored charge at the gate node being responsive to a first voltage level. A second circuit state is implemented in which the drain node is connected to a voltage source, the source node is connected to a load, and while charge at the gate node is preserved, current between the drain node to the source node drives a voltage level of the load to a proportionally amplified version of the first voltage level.
摘要翻译：使用各种不同的实施例来实现放大器电路和方法。根据一个这样的实施例，使用具有栅极节点，源节点和漏极节点的场效应晶体管（FET）来实现一种方法。实现了第一电路状态，其中栅极节点，源节点和漏极节点连接到在栅极节点处产生存储电荷的输入，栅极节点处的存储电荷量响应于第一电压电平。实现第二电路状态，其中漏极节点连接到电压源，源节点连接到负载，并且在栅极节点处的电荷被保持时，漏极节点与源节点之间的电流驱动电压电平的负载到第一电压电平的比例放大版本。

4. 发明申请

US20090315594A1 Source/Emitter Follower Buffer Driving a Switching Load and Having Improved Linearity 有权
标题翻译：源/发射器跟随器缓冲器驱动开关负载并改善线性度
公开(公告)号：US20090315594A1
公开(公告)日：2009-12-24
申请号：US12199804
申请日：2008-08-28
申请人： Visvesvaraya Appala Pentakota , Nitin Agarwal
发明人： Visvesvaraya Appala Pentakota , Nitin Agarwal
IPC分类号： H03K3/00
CPC分类号： H03M1/124 , H03F3/505 , H03F2200/312 , H03F2203/5031
摘要： A source follower or emitter follower buffer provided according to an aspect of the present invention includes a capacitor connected between the input path and a node formed by the junction of a pair of transistors forming a cascoded current source connected to the output of the buffer. The capacitor passes input signal current directly to a switching load connected to the output of the buffer, and very little signal-dependant current flows through the transistor receiving the input signal. As a result, input-output non-linearity due to signal-dependant modulation (variation) of transconductance of the transistor receiving the input signal is minimized. When incorporated in switched-capacitor analog to digital converters, the buffer facilitates generation of digital codes that represent an input signal more accurately.
摘要翻译：根据本发明的一方面提供的源极跟随器或射极跟随器缓冲器包括连接在输入路径和由形成连接到缓冲器的输出的级联电流源的一对晶体管的结的形成的节点之间的电容器。电容器将输入信号电流直接传递到连接到缓冲器输出的开关负载，并且极少的信号相关电流流过接收输入信号的晶体管。结果，由于接收输入信号的晶体管的跨导的信号相关调制（变化）引起的输入 - 输出非线性被最小化。当结合在开关电容器模数转换器中时，缓冲器便于更准确地产生代表输入信号的数字代码。

5. 发明申请

US20050077944A1 Linear buffer 有权
标题翻译：线性缓冲区
公开(公告)号：US20050077944A1
公开(公告)日：2005-04-14
申请号：US10626701
申请日：2003-07-25
申请人： Todd Brooks , Anilkumar Tammineedi
发明人： Todd Brooks , Anilkumar Tammineedi
IPC分类号： H03F3/50 , H03L5/00
CPC分类号： H03F1/3205 , H03F3/005 , H03F3/45475 , H03F3/505 , H03F2200/168 , H03F2200/331 , H03F2200/417 , H03F2200/453 , H03F2203/45101 , H03F2203/5031
摘要： A source-follower transistor based buffer provides high linearity. A replica transistor is used to generate a replica voltage substantially equal to the output voltage of the buffer. The replica voltage is level shifted by a level shift circuit and applied at the drain of the source-follower transistor to improve the linearity of the buffer. The buffer may be used in conjunction with a switched-capacitor sampling circuit. A damping circuit may be used to reduce charge glitches due to sampling. The damping circuit may be a low pass filter. The buffer may be used in an interface circuit that produces an output signal from an input signal and controls the level of the output signal.
摘要翻译：基于源极跟随器晶体管的缓冲器提供高线性度。复制晶体管用于产生基本上等于缓冲器的输出电压的复制电压。复制电压由电平移位电路电平移位并施加在源极跟随器晶体管的漏极处，以提高缓冲器的线性。缓冲器可以与开关电容器采样电路结合使用。可以使用阻尼电路来减少由于取样引起的充电毛刺。阻尼电路可以是低通滤波器。缓冲器可以用在从输入信号产生输出信号并控制输出信号电平的接口电路中。

6. 发明授权

US06727729B2 Linear buffer 有权
标题翻译：线性缓冲区
公开(公告)号：US06727729B2
公开(公告)日：2004-04-27
申请号：US09949662
申请日：2001-09-12
申请人： Todd L. Brooks , Anilkumar V. Tammineedi
发明人： Todd L. Brooks , Anilkumar V. Tammineedi
IPC分类号： H03K190175
CPC分类号： H03F1/3205 , H03F3/005 , H03F3/45475 , H03F3/505 , H03F2200/168 , H03F2200/331 , H03F2200/417 , H03F2200/453 , H03F2203/45101 , H03F2203/5031
摘要： A source-follower transistor based buffer provides high linearity. A replica transistor is used to generate a replica voltage substantially equal to the output voltage of the buffer. The replica voltage is level shifted by a level shift circuit and applied at the drain of the source-follower transistor to improve the linearity of the buffer. The buffer may be used in conjunction with a switched-capacitor sampling circuit. A damping circuit may be used to reduce charge glitches due to sampling. The damping circuit may be a low pass filter. The buffer may be used in an interface circuit that produces an output signal from an input signal and controls the level of the output signal.
摘要翻译：基于源极跟随器晶体管的缓冲器提供高线性度。复制晶体管用于产生基本上等于缓冲器的输出电压的复制电压。复制电压由电平移位电路电平移位并施加在源极跟随器晶体管的漏极处，以提高缓冲器的线性。缓冲器可以与开关电容器采样电路结合使用。可以使用阻尼电路来减少由于取样引起的充电毛刺。阻尼电路可以是低通滤波器。缓冲器可以用在从输入信号产生输出信号并控制输出信号电平的接口电路中。

7. 发明申请

US20180212575A1 TRANSCONDUCTANCE CURRENT SOURCE 审中-公开
公开(公告)号：US20180212575A1
公开(公告)日：2018-07-26
申请号：US15759404
申请日：2016-09-13
申请人： FIRECOMMS LIMITED
发明人： Patrick MURPHY , Colm DONOVAN , Ciaran CAHILL
IPC分类号： H03F3/345 , H03F1/22 , H03F1/32 , H03F3/08 , H03F3/50
CPC分类号： H03F3/345 , H03F1/223 , H03F1/3205 , H03F3/082 , H03F3/505 , H03F2200/456 , H03F2203/5031
摘要： A transconductance circuit has an input terminal (VIN) and an output terminal (Out), a first current source (4) having a gate connected to said input terminal (VIN); and a second current source (5), in parallel with said first current source, and having a higher transconductance and a wider dynamic range than the first current source. The current sources are configured so that at a low input voltage only the first current source (4) is on. A voltage drop circuit provides a lower bias voltage for the second current source than for the first current source.

8. 发明授权

US09246453B2 Tunable RF filter 有权
标题翻译：可调RF滤波器
公开(公告)号：US09246453B2
公开(公告)日：2016-01-26
申请号：US12678507
申请日：2008-09-15
申请人： Mohamed Bouhamame , Luca Lococo , Sebastien Robert
发明人： Mohamed Bouhamame , Luca Lococo , Sebastien Robert
IPC分类号： H03K5/00 , H03F3/50 , H03F1/26 , H03F1/32 , H03F1/34 , H03F1/56 , H03F3/195 , H03F3/45 , H03G5/14 , H03H11/12
CPC分类号： H03F3/50 , H03F1/26 , H03F1/32 , H03F1/34 , H03F1/56 , H03F3/195 , H03F3/45475 , H03F2200/144 , H03F2200/213 , H03F2200/378 , H03F2200/408 , H03F2200/411 , H03F2200/435 , H03F2200/451 , H03F2203/45136 , H03F2203/45522 , H03F2203/5006 , H03F2203/5021 , H03F2203/5024 , H03F2203/5031 , H03F2203/5036 , H03F2203/5039 , H03G5/14 , H03H11/1213 , H03H11/1291
摘要： A tunable RF filter, comprising: an emitter follower stage (2); and a common emitter stage (4); the common emitter stage (4) providing feedback to the emitter follower stage (2). The common emitter stage (4) may comprise a first transistor (Ti) being the only transistor of the common emitter stage (4); and the emitter follower stage (2) may comprise a second transistor (T2) being the only transistor of the emitter follower stage (2). A further tunable RF filter provides improved linearity, comprising: an emitter follower stage (22); a joint common emitter and emitter follower stage (24); and a gain stage (26); a common emitter output of the joint common emitter and emitter follower stage (24) providing feedback to the emitter follower stage (22), and an emitter follower output of the joint common emitter and emitter follower stage (24) providing an input to the gain stage (26).
摘要翻译：一种可调谐RF滤波器，包括：射极跟随器级（2）; 和共同发射极级（4）; 所述公共发射极级（4）向所述射极跟随器级（2）提供反馈。公共发射极级（4）可以包括作为公共发射极级（4）的唯一晶体管的第一晶体管（Ti）。并且射极跟随器级（2）可以包括作为射极跟随器级（2）的唯一晶体管的第二晶体管（T2）。另一可调谐RF滤波器提供改进的线性度，包括：射极跟随器级（22）; 共同的发射极和射极跟随器级（24）; 和增益阶段（26）; 联合共发射极和射极跟随器级（24）的共发射极输出，为射极跟随器级（22）提供反馈，以及联合公共发射极和射极跟随器级（24）的射极跟随器输出，为增益提供输入阶段（26）。

9. 发明授权

US07991370B2 Amplifier circuit and receiving device 有权
标题翻译：放大器电路和接收装置
公开(公告)号：US07991370B2
公开(公告)日：2011-08-02
申请号：US11973855
申请日：2007-10-10
申请人： Tadashi Kabashima , Shoichi Kuroki , Toshio Chikaki
发明人： Tadashi Kabashima , Shoichi Kuroki , Toshio Chikaki
IPC分类号： H04B1/18
CPC分类号： H03F3/19 , H03F1/34 , H03F3/50 , H03F2200/144 , H03F2200/222 , H03F2200/411 , H03F2200/451 , H03F2203/5018 , H03F2203/5024 , H03F2203/5031 , H04B1/18
摘要： Disclosed herein is an amplifier circuit formed by multiple transistor stages and having an input terminal for a signal and an inverted output terminal configured to output an inverted signal after amplification, wherein a feedback resistance and a feedback capacitor for input impedance matching are connected in series with each other between the inverted output terminal and the input terminal.
摘要翻译：本发明公开了一种由多个晶体管级形成的放大器电路，具有用于信号的输入端和被配置为在放大后输出反相信号的反相输出端，其中反馈电阻和用于输入阻抗匹配的反馈电容串联连接在反相输出端子和输入端子之间相互之间。

10. 发明申请

US20110050372A1 Integrated Channel Filter Using Multiple Resonant Filters and Method of Operation 有权
标题翻译：使用多个谐振滤波器的集成通道滤波器和操作方法
公开(公告)号：US20110050372A1
公开(公告)日：2011-03-03
申请号：US12940624
申请日：2010-11-05
申请人： Philip T. Hisayasu , Michael D. Womac
发明人： Philip T. Hisayasu , Michael D. Womac
IPC分类号： H03J3/24
CPC分类号： H03H7/12 , H03F1/22 , H03F3/19 , H03F3/50 , H03F2200/108 , H03F2200/294 , H03F2200/411 , H03F2200/489 , H03F2200/501 , H03F2203/5031 , H03H7/06 , H03H7/1758 , H03H11/1213 , H03H11/1291 , H03J3/20 , H03J2200/10
摘要： A circuit includes a first filter comprising a first inductor coupled to a first variable capacitor, wherein the first filter is associated with a first resonant frequency. The circuit further comprises an amplifier coupled to the first filter and a second filter coupled to the amplifier. The second filter comprises a second inductor coupled to a second variable capacitor, wherein the second filter is associated with a second resonant frequency that is substantially the same as the first resonant frequency. At least a portion of the first filter and at least a portion of the second filter are formed on an integrated circuit.
摘要翻译：电路包括第一滤波器，其包括耦合到第一可变电容器的第一电感器，其中第一滤波器与第一谐振频率相关联。电路还包括耦合到第一滤波器的放大器和耦合到放大器的第二滤波器。第二滤波器包括耦合到第二可变电容器的第二电感器，其中第二滤波器与基本上与第一谐振频率相同的第二谐振频率相关联。第一滤波器的至少一部分和第二滤波器的至少一部分形成在集成电路上。

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