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21. 发明申请

US20090289715A1 AMPLIFIER WITH IMPROVED LINEARIZATION 有权
标题翻译：具有改进线性化的放大器
公开(公告)号：US20090289715A1
公开(公告)日：2009-11-26
申请号：US12126189
申请日：2008-05-23
申请人： Susanta Sengupta , Kenneth Charles Barnett
发明人： Susanta Sengupta , Kenneth Charles Barnett
IPC分类号： H03F3/45
CPC分类号： H03F1/3211 , H03F3/195 , H03F3/45179 , H03F2200/294 , H03F2203/45018 , H03F2203/45454 , H03F2203/45512 , H03F2203/45544
摘要： According to some embodiments, an amplifier may include a transconductance stage, a tail current source stage, and an adaptive biasing stage. The transconductance stage may be configured to receive an input voltage. The tail current source stage may be configured to provide current to the transconductance stage. The adaptive biasing stage may capacitively couple the transconductance stage to the tail current source stage.
摘要翻译：根据一些实施例，放大器可以包括跨导级，尾电流源级和自适应偏置级。跨导级可以被配置为接收输入电压。尾电流源级可以被配置为向跨导级提供电流。自适应偏置级可以将跨导级电容耦合到尾电流源级。

22. 发明授权

US07598793B1 Capacitance multiplier circuit 有权
标题翻译：电容倍增电路
公开(公告)号：US07598793B1
公开(公告)日：2009-10-06
申请号：US12053388
申请日：2008-03-21
申请人： Susanta Sengupta , Kenneth Charles Barnett
发明人： Susanta Sengupta , Kenneth Charles Barnett
IPC分类号： H03H11/40
CPC分类号： H03H11/405 , H03F3/45183 , H03F3/45659 , H03F2200/456 , H03F2203/45318 , H03F2203/45526 , H03F2203/45646 , H03H11/0416 , H03H11/483
摘要： A capacitance multiplier circuit is configured to sense a current through a capacitor in an RC filter of the circuit and to multiply the current so as to achieve a capacitance multiplier effect without adding additional circuitry or requiring additional power. The circuit includes an RC filter, a first signal path connected to a filter output, and a second signal path connected to an input to the filter. A current output through the filter (iout) is split between the two paths, sensed in the first path and multiplied in the second path. The multiplied current is fed back from the second path to the filter input to raise the effective capacitance of capacitor C. The capacitance multiplier circuit, in raising the effective capacitance of the capacitor in the filter, does not affect the frequency response, linearity performance and/or stability of the overall circuit.
摘要翻译：电容乘法器电路被配置为感测通过电路的RC滤波器中的电容器的电流，并且乘以电流以实现电容倍增器效应，而不增加附加电路或需要额外的功率。电路包括RC滤波器，连接到滤波器输出的第一信号路径和连接到滤波器的输入端的第二信号路径。通过滤波器（iout）的电流输出在两条路径之间分开，在第一路径中感测并在第二条路径中相乘。倍增电流从第二路径反馈到滤波器输入，以提高电容器C的有效电容。电容乘法器电路在提高滤波器中的电容器的有效电容时不影响频率响应，线性性能和 /或整体电路的稳定性。

23. 发明授权

US08589750B2 Methods and apparatus for providing a built-in self test 有权
标题翻译：提供内置自检的方法和设备
公开(公告)号：US08589750B2
公开(公告)日：2013-11-19
申请号：US12836462
申请日：2010-07-14
申请人： Gaurab Banerjee , Manas Behera , Kenneth Charles Barnett
发明人： Gaurab Banerjee , Manas Behera , Kenneth Charles Barnett
IPC分类号： H03M13/00
CPC分类号： G01R31/3187 , G06F11/27
摘要： A built-in self test (BiST) system is described. The BiST system includes a circuit-under-test. The BiST system also includes one or more embedded sensors. Each of the embedded sensors includes one or more switches connected to one or more nodes within the circuit-under-test. The BiST system further includes a signal generator. The BiST system also includes a bus interface. The bus interface provides for external access of the BiST system.
摘要翻译：描述了内置的自检（BiST）系统。 BiST系统包括一个电路不足测试。 BiST系统还包括一个或多个嵌入式传感器。每个嵌入式传感器包括连接到被测电路中的一个或多个节点的一个或多个开关。 BiST系统还包括信号发生器。 BiST系统还包括总线接口。总线接口提供BiST系统的外部访问。

24. 发明授权

US08385872B2 Linear transconductor for RF communications 有权
标题翻译：用于射频通信的线性跨导器
公开(公告)号：US08385872B2
公开(公告)日：2013-02-26
申请号：US13288265
申请日：2011-11-03
申请人： Harish S. Muthali , Kenneth Charles Barnett
发明人： Harish S. Muthali , Kenneth Charles Barnett
IPC分类号： H04B1/10 , H04B1/04
CPC分类号： H03F3/45188 , H03F1/32 , H03F1/3211 , H03F3/45 , H03F3/45659 , H03F2200/357 , H03F2203/45068 , H03F2203/45318 , H03F2203/45352
摘要： The present patent application comprises a linear transconductor having at least one input and at least one output, comprising a differential amplifier having a plurality of transistors and a plurality of inputs, wherein a difference of input signals is amplified, a cascode circuit having a plurality of transistors, wherein the transistors are operably connected to the differential amplifier, wherein reverse isolation between an input and an output of the linear transconductor is improved by decoupling the input and the output of the linear transconductor by mounting at least one transistor of the plurality of transistors of the cascode circuit as a common-gate stacked on the at least one transistor of the differential amplifier, an active load having a plurality of transistors operably connected between the cascode circuit and supply voltage, and an auxiliary device operably connected to the connection between the active load, the cascode device and ground.
摘要翻译：本专利申请包括具有至少一个输入和至少一个输出的线性跨导体，包括具有多个晶体管和多个输入的差分放大器，其中放大输入信号的差异，具有多个输入信号的共源共栅电路晶体管，其中晶体管可操作地连接到差分放大器，其中线性跨导器的输入和输出之间的反向隔离通过将多个晶体管中的至少一个晶体管安装到线性跨导器的输入和输出而被改善作为堆叠在差分放大器的至少一个晶体管上的公共栅极的共源共栅电路，具有可操作地连接在共源共栅电路和电源电压之间的多个晶体管的有源负载和可操作地连接到所述串联电路之间的连接的辅助装置有源负载，共源共栅器件和地。

25. 发明授权

US07889007B2 Differential amplifier with active post-distortion linearization 有权
标题翻译：具有有源后失真线性化的差分放大器
公开(公告)号：US07889007B2
公开(公告)日：2011-02-15
申请号：US11696876
申请日：2007-04-05
申请人： Namsoo Kim , Kenneth Charles Barnett , Vladimir Aparin
发明人： Namsoo Kim , Kenneth Charles Barnett , Vladimir Aparin
IPC分类号： H03F3/18
CPC分类号： H03F1/3211 , H03F1/22 , H03F1/223 , H03F1/26 , H03F1/3205 , H03F1/3276 , H03F3/45188 , H03F2200/294 , H03F2200/372 , H03F2200/456 , H03F2200/489 , H03F2200/492 , H03F2203/45296 , H03F2203/45311 , H03F2203/45352 , H03F2203/45386 , H03F2203/45481 , H04B1/525
摘要： A differential amplifier, which has good linearity and noise performance, includes a first side that includes first, second, third, and fourth transistors and an inductor. The first and second transistors are coupled as a first cascode pair, and the third and fourth transistors are coupled as a second cascode pair. The third transistor has its gate coupled to the source of the second transistor, and the fourth transistor has its drain coupled to the drain of the second transistor. The first transistor provides signal amplification. The second transistor provides load isolation and generates an intermediate signal for the third transistor. The third transistor generates distortion components used to cancel third order distortion component generated by the first transistor. The inductor provides source degeneration for the first transistor and improves distortion cancellation. The sizes of the second and third transistors are selected to reduce gain loss and achieve good linearity for the amplifier. The differential amplifier also may include a second side that functions similarly to the first side.
摘要翻译：具有良好线性度和噪声性能的差分放大器包括包括第一，第二，第三和第四晶体管和电感器的第一侧。第一和第二晶体管作为第一共源共栅对耦合，并且第三和第四晶体管作为第二共源共栅对耦合。第三晶体管的栅极耦合到第二晶体管的源极，并且第四晶体管的漏极耦合到第二晶体管的漏极。第一个晶体管提供信号放大。第二晶体管提供负载隔离并为第三晶体管产生中间信号。第三晶体管产生用于消除由第一晶体管产生的三阶失真分量的失真分量。电感器为第一晶体管提供源极退化并改善失真消除。选择第二和第三晶体管的尺寸以减小增益损失并且为放大器获得良好的线性度。差分放大器还可以包括与第一侧类似地起作用的第二侧。

26. 发明申请

US20090085549A1 BANDGAP REFERENCE CIRCUIT WITH REDUCED POWER CONSUMPTION 有权
标题翻译：具有降低功耗的带宽参考电路
公开(公告)号：US20090085549A1
公开(公告)日：2009-04-02
申请号：US11866120
申请日：2007-10-02
申请人： Susanta Sengupta , Kenneth Charles Barnett , Yunfei Feng
发明人： Susanta Sengupta , Kenneth Charles Barnett , Yunfei Feng
IPC分类号： G05F3/16 , G05F3/02
CPC分类号： G05F3/30
摘要： A bandgap voltage reference circuit and methods for generating a bandgap reference voltage are disclosed. An operational amplifier receives first and second input voltages from a first and second current path, respectively. A buffer stage is coupled to an output of the operational amplifier and generates third and fourth voltages on the first and second path. A temperature dependent current is generated using the third and fourth voltages in combination with a first diode, second diode and a resistor. A third current path mirrors the temperature dependent current and a temperature independent voltage is generated for the bandgap reference voltage in the third current path using the temperature dependent current in combination with a second resistor and related diode.
摘要翻译：公开了一种带隙电压参考电路和用于产生带隙基准电压的方法。运算放大器分别从第一和第二电流路径接收第一和第二输入电压。缓冲级耦合到运算放大器的输出，并在第一和第二路径上产生第三和第四电压。使用与第一二极管，第二二极管和电阻器组合的第三和第四电压产生与温度相关的电流。第三电流通路反映温度相关电流，并且使用与第二电阻器和相关二极管组合的温度相关电流，在第三电流通路中为带隙参考电压产生与温度无关的电压。

27. 发明申请

US20080231362A1 LINEAR TRANSCONDUCTOR FOR RF COMMUNICATIONS 有权
标题翻译：用于射频通信的线性TRANSCONDUCTOR
公开(公告)号：US20080231362A1
公开(公告)日：2008-09-25
申请号：US11761947
申请日：2007-06-12
申请人： Harish Muthali , Kenneth Charles Barnett
发明人： Harish Muthali , Kenneth Charles Barnett
IPC分类号： H03F3/45
CPC分类号： H03F3/45188 , H03F1/32 , H03F1/3211 , H03F3/45 , H03F3/45659 , H03F2200/357 , H03F2203/45068 , H03F2203/45318 , H03F2203/45352
摘要： The present patent application comprises a linear transconductor having at least one input and at least one output, comprising a differential amplifier having a plurality of transistors and a plurality of inputs, wherein a difference of input signals is amplified, a cascode circuit having a plurality of transistors, wherein the transistors are operably connected to the differential amplifier, wherein reverse isolation between an input and an output of the linear transconductor is improved by decoupling the input and the output of the linear transconductor by mounting at least one transistor of the plurality of transistors of the cascode circuit as a common-gate stacked on the at least one transistor of the differential amplifier, an active load having a plurality of transistors operably connected between the cascode circuit and supply voltage, and an auxiliary device operably connected to the connection between the active load, the cascode device and ground.
摘要翻译：本专利申请包括具有至少一个输入和至少一个输出的线性跨导体，包括具有多个晶体管和多个输入的差分放大器，其中放大输入信号的差异，具有多个输入信号的共源共栅电路晶体管，其中晶体管可操作地连接到差分放大器，其中线性跨导器的输入和输出之间的反向隔离通过将多个晶体管中的至少一个晶体管安装到线性跨导器的输入和输出而被改善作为堆叠在差分放大器的至少一个晶体管上的公共栅极的共源共栅电路，具有可操作地连接在共源共栅电路和电源电压之间的多个晶体管的有源负载和可操作地连接到所述串联电路之间的连接的辅助装置有源负载，共源共栅器件和地。

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