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1. 发明申请

US20110051639A1 DYNAMIC LOW POWER RADIO MODES 有权
标题翻译：动态低功率无线电模式
公开(公告)号：US20110051639A1
公开(公告)日：2011-03-03
申请号：US12546867
申请日：2009-08-25
申请人： Sthanunathan Ramakrishnan , Bijoy Bhukania , Jawaharlal Tangudu , Sarma S. Gunturi , Jaiganesh Balakrishnan , Rakesh Kumar , Abhijit Kumar Das , Yogesh Darwhekar
发明人： Sthanunathan Ramakrishnan , Bijoy Bhukania , Jawaharlal Tangudu , Sarma S. Gunturi , Jaiganesh Balakrishnan , Rakesh Kumar , Abhijit Kumar Das , Yogesh Darwhekar
IPC分类号： G08C17/02 , H04L27/00
CPC分类号： H04L12/12 , H04W24/00 , H04W28/18 , H04W52/028 , H04W84/12 , H04W84/18 , H04W88/02 , Y02D70/142 , Y02D70/144 , Y02D70/162 , Y02D70/23
摘要： A receiver in a packet based communication system includes a programmable block and a detection block that detects at least one of an operating condition of the receiver and a protocol condition of the communication system. Further, the receiver includes a control circuit coupled to the programmable block that controls the programmable block to transition to a set of radio modes according to at least one of the operating condition and the protocol condition.
摘要翻译：基于分组的通信系统中的接收机包括可编程块和检测接收机的操作条件和通信系统的协议状态中的至少一个的检测块。此外，接收机包括耦合到可编程块的控制电路，其根据操作条件和协议条件中的至少一个控制可编程块向一组无线电模式转变。

2. 发明授权

US08477631B2 Dynamic low power radio modes 有权
标题翻译：动态低功率无线电模式
公开(公告)号：US08477631B2
公开(公告)日：2013-07-02
申请号：US12546867
申请日：2009-08-25
申请人： Sthanunathan Ramakrishnan , Bijoy Bhukania , Jawaharlal Tangudu , Sarma S Gunturi , Jaiganesh Balakrishnan , Rakesh Kumar , Abhijit Kumar Das , Yogesh Darwhekar
发明人： Sthanunathan Ramakrishnan , Bijoy Bhukania , Jawaharlal Tangudu , Sarma S Gunturi , Jaiganesh Balakrishnan , Rakesh Kumar , Abhijit Kumar Das , Yogesh Darwhekar
IPC分类号： H04B7/00
CPC分类号： H04L12/12 , H04W24/00 , H04W28/18 , H04W52/028 , H04W84/12 , H04W84/18 , H04W88/02 , Y02D70/142 , Y02D70/144 , Y02D70/162 , Y02D70/23
摘要： A receiver in a packet based communication system includes a programmable block and a detection block that detects at least one of an operating condition of the receiver and a protocol condition of the communication system. Further, the receiver includes a control circuit coupled to the programmable block that controls the programmable block to transition to a set of radio modes according to at least one of the operating condition and the protocol condition.
摘要翻译：基于分组的通信系统中的接收机包括可编程块和检测接收机的操作条件和通信系统的协议条件中的至少一个的检测块。此外，接收机包括耦合到可编程块的控制电路，其根据操作条件和协议条件中的至少一个控制可编程块向一组无线电模式转变。

3. 发明授权

US08179198B2 Variable gain amplifier having automatic power consumption optimization 有权
标题翻译：具有自动功耗优化的可变增益放大器
公开(公告)号：US08179198B2
公开(公告)日：2012-05-15
申请号：US12840933
申请日：2010-07-21
申请人： Abhijit Kumar Das , Michel Frechette
发明人： Abhijit Kumar Das , Michel Frechette
IPC分类号： H03G3/10
CPC分类号： H03G1/0029 , H03F3/45183 , H03F2203/45466 , H03F2203/45521 , H03F2203/45641 , H03F2203/45654 , H03G7/08
摘要： A variable gain amplifier may include a master amplifier that may be configured to generate a first current and a diode coupled with the master amplifier so that the first current passes through the diode which, when the first current is passing through the diode, generates a diode voltage signal. According to embodiments, an error amplifier may include a first input configured to receive a gain control voltage signal and a second input configured to receive the diode voltage signal. The output of the error amplifier may provide a feedback signal. The amplifier may include a circuit configured to generate at least one voltage control signal based on the feedback signal and a slave amplifier configured to adjust a gain amount based on the at least one voltage control signal.
摘要翻译：可变增益放大器可以包括主放大器，其可以被配置为产生与主放大器耦合的第一电流和二极管，使得第一电流通过二极管，当第一电流通过二极管时，二极管产生二极管电压信号。根据实施例，误差放大器可以包括被配置为接收增益控制电压信号的第一输入和被配置为接收二极管电压信号的第二输入。误差放大器的输出可以提供反馈信号。放大器可以包括被配置为基于反馈信号生成至少一个电压控制信号的电路和被配置为基于至少一个电压控制信号来调整增益量的从放大器。

4. 发明申请

US20120092200A1 SIGMA-DELTA MODULATOR 有权
标题翻译： SIGMA-DELTA调制器
公开(公告)号：US20120092200A1
公开(公告)日：2012-04-19
申请号：US12906798
申请日：2010-10-18
申请人： Abhijit Kumar Das
发明人： Abhijit Kumar Das
IPC分类号： H03M3/00
CPC分类号： H03M3/434
摘要： A Sigma-Delta Modulator (SDM) has a summing junction that receives an input signal and a feedback signal, a multi-level analog-to-digital converter (ADC) that receives the SDM input signal and generates an ADC output, a first analog switch that receives the ADC output and generates a plurality of reference voltages, a second analog switch generating the feedback signal, where the feedback signal is selected from one of the reference voltages.
摘要翻译： Σ-Δ调制器（SDM）具有接收输入信号和反馈信号的求和点，接收SDM输入信号并产生ADC输出的多电平模数转换器（ADC），第一模拟接收ADC输出并产生多个参考电压的开关，产生反馈信号的第二模拟开关，其中反馈信号从参考电压之一中选择。

5. 发明申请

US20110210793A1 VARIABLE GAIN AMPLIFIER HAVING AUTOMATIC POWER CONSUMPTION OPTIMIZATION 有权
标题翻译：具有自动消耗功率优化的可变增益放大器
公开(公告)号：US20110210793A1
公开(公告)日：2011-09-01
申请号：US12840933
申请日：2010-07-21
申请人： Abhijit Kumar Das , Michel Frechette
发明人： Abhijit Kumar Das , Michel Frechette
IPC分类号： H03F3/45
CPC分类号： H03G1/0029 , H03F3/45183 , H03F2203/45466 , H03F2203/45521 , H03F2203/45641 , H03F2203/45654 , H03G7/08
摘要： A variable gain amplifier may include a master amplifier that may be configured to generate a first current and a diode coupled with the master amplifier so that the first current passes through the diode which, when the first current is passing through the diode, generates a diode voltage signal. According to embodiments, an error amplifier may include a first input configured to receive a gain control voltage signal and a second input configured to receive the diode voltage signal. The output of the error amplifier may provide a feedback signal. The amplifier may include a circuit configured to generate at least one voltage control signal based on the feedback signal and a slave amplifier configured to adjust a gain amount based on the at least one voltage control signal.
摘要翻译：可变增益放大器可以包括主放大器，其可以被配置为产生与主放大器耦合的第一电流和二极管，使得第一电流通过二极管，当第一电流通过二极管时，二极管产生二极管电压信号。根据实施例，误差放大器可以包括被配置为接收增益控制电压信号的第一输入和被配置为接收二极管电压信号的第二输入。误差放大器的输出可以提供反馈信号。放大器可以包括被配置为基于反馈信号生成至少一个电压控制信号的电路和被配置为基于至少一个电压控制信号来调整增益量的从放大器。

6. 发明授权

US07564391B2 Sigma delta modulator summing input, reference voltage, and feedback 有权
标题翻译： Sigma delta调制器求和输入，参考电压和反馈
公开(公告)号：US07564391B2
公开(公告)日：2009-07-21
申请号：US11946060
申请日：2007-11-28
申请人： Abhijit Kumar Das
发明人： Abhijit Kumar Das
IPC分类号： H03M3/00
CPC分类号： H03M3/42 , H03M3/43 , H03M3/438
摘要： A multibit sigma delta modulator for conveting an analog input signal (Vin) into a multibit digital output signal is disclosed. In one embodiment, the multibit sigma modulator includes a first analog filter for filtering the analog input error signal, a quantizer including multiple single bit noise shaped modulators for quantizing the filtered analog input error signal outputted by the first analog filter for generating a multibit digital output signal, and a first feedback arrangement with at least one digital-to-analog converter (DAC) coupled to the quantizer for supplying to the first analog filter at least one quantizer feedback signal based on the multibit digital output signal.
摘要翻译：公开了一种用于将模拟输入信号（Vin）转换为多位数字输出信号的多位Σ-Δ调制器。在一个实施例中，多位Σ调制器包括用于对模拟输入误差信号进行滤波的第一模拟滤波器，包含多个单比特噪声整形调制器的量化器，用于量化由第一模拟滤波器输出的滤波的模拟输入误差信号，用于产生多位数字输出信号以及与至少一个耦合到量化器的数模转换器（DAC）的第一反馈装置，用于向第一模拟滤波器提供基于多位数字输出信号的至少一个量化器反馈信号。

7. 发明授权

US08319554B1 Amplifier with start-up common mode feedback 有权
标题翻译：具有启动共模反馈的放大器
公开(公告)号：US08319554B1
公开(公告)日：2012-11-27
申请号：US13110750
申请日：2011-05-18
申请人： Abhijit Kumar Das
发明人： Abhijit Kumar Das
IPC分类号： H03F3/45
CPC分类号： H03F1/305 , H03F1/223 , H03F3/45192 , H03F3/45659 , H03F2203/45418 , H03F2203/45424 , H03F2203/45528 , H03F2203/45594 , H03F2203/45648
摘要： An amplifier with a cascode device contains a common mode feedback circuit to ensure correct operating point in the amplifier. Common mode feedback is provided to the amplifier to maintain the common mode operating point during active operation. Additional common mode feedback is provided to the cascode devices to ensure correct start-up by forcing the node voltages to go to their desired voltage levels.
摘要翻译：具有共源共栅器件的放大器包含一个共模反馈电路，以确保放大器中的正确工作点。向放大器提供共模反馈，以在主动操作期间保持共模工作点。向共源共用器件提供额外的共模反馈，以通过强制节点电压达到所需的电压电平来确保正确的启动。

8. 发明申请

US20120293261A1 Amplifier with Start-up Common Mode Feedback 有权
标题翻译：具有启动共模反馈的放大器
公开(公告)号：US20120293261A1
公开(公告)日：2012-11-22
申请号：US13110750
申请日：2011-05-18
申请人： Abhijit Kumar Das
发明人： Abhijit Kumar Das
IPC分类号： H03F1/22 , H03F3/45
CPC分类号： H03F1/305 , H03F1/223 , H03F3/45192 , H03F3/45659 , H03F2203/45418 , H03F2203/45424 , H03F2203/45528 , H03F2203/45594 , H03F2203/45648
摘要： An amplifier with a cascode device contains a common mode feedback circuit to ensure correct operating point in the amplifier. Common mode feedback is provided to the amplifier to maintain the common mode operating point during active operation. Additional common mode feedback is provided to the cascode devices to ensure correct start-up by forcing the node voltages to go to their desired voltage levels.
摘要翻译：具有共源共栅器件的放大器包含一个共模反馈电路，以确保放大器中的正确工作点。向放大器提供共模反馈，以在主动操作期间保持共模工作点。向共源共用器件提供额外的共模反馈，以通过强制节点电压达到所需的电压电平来确保正确的启动。

9. 发明授权

US06727757B1 Biasing circuit for transconductors 有权
标题翻译：用于跨导体的偏置电路
公开(公告)号：US06727757B1
公开(公告)日：2004-04-27
申请号：US10335736
申请日：2003-01-02
申请人： Srinivasan Venkatraman , Abhijit Kumar Das
发明人： Srinivasan Venkatraman , Abhijit Kumar Das
IPC分类号： H03F345
CPC分类号： H03F3/45659 , H03F3/45183 , H03F3/45645 , H03F2203/45082 , H03F2203/45698
摘要： A transconductor circuit, including a differential transconductor amplifier circuit. The transconductor circuit includes an input pair of transistors adapted to receive a differential input voltage, as well as a pair of output terminals adapted to provide a differential output current. A second pair of transistors provides current to the input pair of transistors. A floating voltage circuit is adapted to generate a floating voltage corresponding to a common-mode voltage of the differential output nodes and to control the second pair of transistors in response to the floating voltage to stabilize the common-mode voltage of the differential transconductor amplifier circuit.
摘要翻译：一种跨导电路，包括差分跨导放大器电路。跨导电路包括适于接收差分输入电压的输入一对晶体管，以及适于提供差分输出电流的一对输出端子。第二对晶体管向输入的晶体管对提供电流。浮动电压电路适于产生对应于差分输出节点的共模电压的浮动电压，并且响应于浮置电压来控制第二对晶体管以稳定差分跨导放大器电路的共模电压。

10. 发明授权

US06590431B1 Maintaining substantially constant trans-conductance without substantially changing power consumption 有权
标题翻译：维持基本上恒定的反电导而不显着改变功耗
公开(公告)号：US06590431B1
公开(公告)日：2003-07-08
申请号：US10170431
申请日：2002-06-14
申请人： Abhijit Kumar Das , Srinivasan Venkatraman
发明人： Abhijit Kumar Das , Srinivasan Venkatraman
IPC分类号： H02M1100
CPC分类号： H03F3/72 , H03F1/0277 , H03F2200/294
摘要： The current passing in a main trans-conductor circuit is compared in analog domain with a reference current. If the passing current exceeds the reference current, another trans-conductor circuit may be switched on to cause the effective area of trans-conductor circuits to be increased. Using such a feature, the trans-conductance value may be maintained substantially constant without substantially increasing power.
摘要翻译：将主导体电路中的电流在模拟域与参考电流进行比较。如果通过电流超过参考电流，则可以接通另一个跨导体电路，以增加跨导体电路的有效面积。使用这样的特征，跨导度值可以保持基本恒定，而基本上不增加功率。

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