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1. 发明申请

WO2011061637A1 SYSTEM FOR REDUCING DISTORTION IN AN ELECTRONIC CIRCUIT USING NONLINEAR FEEDBACK 审中-公开
标题翻译：使用非线性反馈减少电子电路中的失真的系统
公开(公告)号：WO2011061637A1
公开(公告)日：2011-05-26
申请号：PCT/IB2010/054081
申请日：2010-09-10
申请人： INDIAN INSTITUTE OF SCIENCE , AMRUTUR, Bharadwaj , SRINIVASAN, Madhusudan , PRADEEP K, Bhavani
发明人： AMRUTUR, Bharadwaj , SRINIVASAN, Madhusudan , PRADEEP K, Bhavani
IPC分类号： H03F1/32
CPC分类号： H03F1/34 , H03F1/3205 , H03F3/45197 , H03F2203/45492 , H03F2203/45511
摘要： System and methods for reducing third harmonic distortion produced by nonlinear amplifiers are disclosed. A system may include an amplifier circuit with an amplifier transistor such that the amplifier is capable of exhibiting an amplifier output signal containing third harmonic distortion. Further, a system may include a nonlinear feedback circuit with a first feedback transistor operating in Triode mode that produces a feedback electronic signal containing a feedback third harmonic component. In addition, the nonlinear feedback circuit may be configured to the amplifier circuit in negative feedback such that the feedback third harmonic component of the feedback electronic signal reduces the third harmonic distortion of the amplifier output signal. A system may also provide an output signal that has less third harmonic distortion than the amplifier output signal.
摘要翻译：公开了用于减少由非线性放大器产生的三次谐波失真的系统和方法。系统可以包括具有放大器晶体管的放大器电路，使得放大器能够呈现包含三次谐波失真的放大器输出信号。此外，系统可以包括具有以三极管模式工作的第一反馈晶体管的非线性反馈电路，其产生包含反馈三次谐波分量的反馈电子信号。此外，非线性反馈电路可以被配置为负反馈的放大器电路，使得反馈电子信号的反馈三次谐波分量减小放大器输出信号的三次谐波失真。系统还可以提供具有比放大器输出信号少的三次谐波失真的输出信号。

2. 发明申请

WO2010136862A8 LOW NOISE AMPLIFIER AND MIXER 审中-公开
标题翻译：低噪声放大器和混频器
公开(公告)号：WO2010136862A8
公开(公告)日：2011-03-03
申请号：PCT/IB2010001132
申请日：2010-05-17
申请人： INDIAN INST SCIENT , AMRUTUR BHARADWAJ , SANKARAGOMATHI KANNAN ARYAPERUMAL
发明人： AMRUTUR BHARADWAJ , SANKARAGOMATHI KANNAN ARYAPERUMAL
IPC分类号： H03F1/26
CPC分类号： H03F3/195 , H03F1/0261 , H03F1/0277 , H03F1/223 , H03F1/3205 , H03F3/211 , H03F3/72 , H03F2200/18 , H03F2200/222 , H03F2200/294 , H03F2200/451 , H03F2200/555 , H03F2203/21142 , H03F2203/21178 , H03F2203/7236 , H03G1/0088 , H03G3/3052
摘要： A low noise amplifier (LNA) system with controllable linearity and noise figure versus power consumption is provided. The system comprises two control inputs for tuning. One input controls an effective transistor width, and the other input controls bias current. Changes to the effective transistor width alter a gain that is applied to a signal, and changes to the bias current alter a power consumption of the system. For more stringent signal specifications, an impedance matched inductive degeneration variation of the LNA is provided.
摘要翻译：提供了具有可控线性度和噪声系数与功耗的低噪声放大器（LNA）系统。该系统包括两个用于调谐的控制输入。一个输入控制有效的晶体管宽度，另一个输入控制偏置电流。对有效晶体管宽度的改变改变了施加到信号的增益，并且改变偏置电流改变了系统的功耗。对于更严格的信号规范，提供LNA的阻抗匹配的电感退化变化。

3. 发明申请

WO2011051826A1 ADAPTIVE DIGITAL BASEBAND RECEIVER 审中-公开
标题翻译：自适应数字基带接收器
公开(公告)号：WO2011051826A1
公开(公告)日：2011-05-05
申请号：PCT/IB2010/054044
申请日：2010-09-08
申请人： INDIAN INSTITUTE OF SCIENCE , AMRUTUR, Bharadwaj , DWIVEDI, Satyam , BHAT, Navakanta
发明人： AMRUTUR, Bharadwaj , DWIVEDI, Satyam , BHAT, Navakanta
IPC分类号： H04W52/24 , H04W52/02 , H04L25/00 , H04W52/20
CPC分类号： H04B1/1027
摘要： An adaptive digital baseband receiver is described in which operating parameters of the receiver, such as bit- widths and operating frequencies, are determined that achieve a target bit- error-ratio (BER) as a function of received signal-to-noise ratio (SNR) and interference levels in a wireless channel and enable the receiver to consume a minimum amount of power. Over consumption of power may be avoided due to a functional relationship between optimal resolution and input signal conditions. In exemplary embodiments, the adaptive digital receiver is provided that adjusts bit- widths and operating frequency at power efficient levels while meeting a target BER. Simulations can be used to determine a relation between bit-width, operating frequency, and input signal conditions, for example.
摘要翻译：描述了一种自适应数字基带接收机，其中确定接收机的操作参数，例如比特宽度和操作频率，其实现作为接收信噪比的函数的目标比特误差比（BER） SNR）和无线信道中的干扰电平，并使得接收机能够消耗最小量的功率。由于最佳分辨率和输入信号条件之间的功能关系，可能会避免过度消耗功率。在示例性实施例中，提供了自适应数字接收机，其在满足目标BER的情况下以功率有效等级调整位宽和工作频率。例如，可以使用模拟来确定位宽度，工作频率和输入信号条件之间的关系。

4. 发明申请

WO2010136862A1 LOW NOISE AMPLIFIER AND MIXER 审中-公开
标题翻译：低噪声放大器和混频器
公开(公告)号：WO2010136862A1
公开(公告)日：2010-12-02
申请号：PCT/IB2010/001132
申请日：2010-05-17
申请人： INDIAN INSTITUTE OF SCIENCE , AMRUTUR, Bharadwaj , SANKARAGOMATHI, Kannan, Aryaperumal
发明人： AMRUTUR, Bharadwaj , SANKARAGOMATHI, Kannan, Aryaperumal
IPC分类号： H03F1/26
CPC分类号： H03F3/195 , H03F1/0261 , H03F1/0277 , H03F1/223 , H03F1/3205 , H03F3/211 , H03F3/72 , H03F2200/18 , H03F2200/222 , H03F2200/294 , H03F2200/451 , H03F2200/555 , H03F2203/21142 , H03F2203/21178 , H03F2203/7236 , H03G1/0088 , H03G3/3052
摘要： A low noise amplifier (LNA) system with controllable linearity and noise figure versus power consumption is provided. The system comprises two control inputs for tuning. One input controls an effective transistor width, and the other input controls bias current. Changes to the effective transistor width alter a gain that is applied to a signal, and changes to the bias current alter a power consumption of the system. For more stringent signal specifications, an impedance matched inductive degeneration variation of the LNA is provided.
摘要翻译：提供了具有可控线性度和噪声系数与功耗的低噪声放大器（LNA）系统。该系统包括两个用于调谐的控制输入。一个输入控制有效的晶体管宽度，另一个输入控制偏置电流。对有效晶体管宽度的改变会改变施加到信号的增益，并且改变偏置电流会改变系统的功耗。对于更严格的信号规范，提供LNA的阻抗匹配的电感退化变化。

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