公开(公告)号：US08912843B2

公开(公告)日：2014-12-16

申请号：US13009868

申请日：2011-01-20

申请人： Prasun Kali Bhattacharyya ,  Sumanth Chakkirala ,  Prakash Easwaran

发明人： Prasun Kali Bhattacharyya ,  Sumanth Chakkirala ,  Prakash Easwaran

IPC分类号： H04B1/10 ,  H03H7/01 ,  H03H7/06 ,  H03H11/12

CPC分类号： H03H7/0153 ,  H03H7/06 ,  H03H11/12 ,  H03H2210/012 ,  H03H2210/028

摘要： An ultra low cut-off frequency filter. A filter circuit includes a control circuit responsive to an input signal and a feedback signal to generate a control signal. The filter circuit includes a controllable resistor coupled to the control circuit. The controllable resistor is responsive to a reference signal and the control signal to generate the feedback signal. The filter circuit includes a feedback path coupled to the control circuit and the controllable resistor to couple the feedback signal from the controllable resistor to the control circuit, thereby removing noise from at least one of the input signal and the reference signal, and preventing voltage error in the filter circuit.

摘要翻译： 超低截止频率滤波器。 滤波电路包括响应于输入信号和反馈信号的控制电路以产生控制信号。 滤波器电路包括耦合到控制电路的可控电阻器。 可控电阻响应于参考信号和控制信号以产生反馈信号。 滤波器电路包括耦合到控制电路和可控电阻器的反馈路径，以将来自可控电阻器的反馈信号耦合到控制电路，从而从输入信号和参考信号中的至少一个消除噪声，并且防止电压误差 在滤波电路中。

公开(公告)号：US08736363B2

公开(公告)日：2014-05-27

申请号：US13009869

申请日：2011-01-20

申请人： Prasun Kali Bhattacharyya ,  Sumanth Chakkirala

发明人： Prasun Kali Bhattacharyya ,  Sumanth Chakkirala

IPC分类号： H03F1/14 ,  H03F3/68

CPC分类号： H03F1/0277 ,  H03F2200/393

摘要： A circuit for optimizing a power management system. The circuit includes a first amplifier. The first amplifier is responsive to a first reference signal and operable to supply a first load current. The circuit also includes a second amplifier coupled to the first amplifier. The second amplifier is responsive to a second reference signal and operable to supply a second load current. The second load current is lower in magnitude than the first load current, thereby enabling the first amplifier to operate during a first load condition, and the second amplifier to operate during the first load condition and a second load condition. Further, the circuit includes a resistive element coupled to the first amplifier and the second amplifier, to isolate the first amplifier from the second amplifier.

摘要翻译： 用于优化电源管理系统的电路。 电路包括第一放大器。 第一放大器响应于第一参考信号并且可操作以提供第一负载电流。 电路还包括耦合到第一放大器的第二放大器。 第二放大器响应于第二参考信号并且可操作以提供第二负载电流。 第二负载电流的幅度比第一负载电流低，从而使得第一放大器能够在第一负载状态下工作，并且第二放大器在第一负载条件和第二负载条件期间操作。 此外，电路包括耦合到第一放大器和第二放大器的电阻元件，以将第一放大器与第二放大器隔离。

公开(公告)号：US08878510B2

公开(公告)日：2014-11-04

申请号：US13472461

申请日：2012-05-15

申请人： Prasun Kali Bhattacharyya ,  Prakash Easwaran

发明人： Prasun Kali Bhattacharyya ,  Prakash Easwaran

IPC分类号： G05F3/08

CPC分类号： G05F1/565 ,  G05F1/575

摘要： A voltage regulator includes an amplifier, a first buffer and a second buffer. The amplifier is designed to generate an error voltage between a reference voltage and a voltage at an output node of the voltage regulator. The first buffer is coupled to receive the amplified error voltage and, in response, to drive a first pass transistor. The first buffer includes a non-linear resistance element. The resistance of the non-linear resistance element varies non-linearly with a load current drawn from the output node. The second buffer is coupled to receive the amplified error voltage, and in response, to drive a second pass transistor. The second buffer includes a linear resistance element. The resistance of the linear element is a constant. The use of the non-linear resistance element enables reduction in power consumption in the voltage regulator.

摘要翻译： 电压调节器包括放大器，第一缓冲器和第二缓冲器。 放大器设计用于在电压调节器的输出节点处产生参考电压和电压之间的误差电压。 第一缓冲器被耦合以接收放大的误差电压，并且作为响应来驱动第一传输晶体管。 第一缓冲器包括非线性电阻元件。 非线性电阻元件的电阻随从输出节点引出的负载电流而非线性变化。 第二缓冲器被耦合以接收放大的误差电压，并且响应于驱动第二传输晶体管。 第二缓冲器包括线性电阻元件。 线性元件的电阻是一个常数。 使用非线性电阻元件能够降低电压调节器的功耗。

公开(公告)号：US20130307502A1

公开(公告)日：2013-11-21

申请号：US13472461

申请日：2012-05-15

申请人： Prasun Kali Bhattacharyya ,  Prakash Easwaran

发明人： Prasun Kali Bhattacharyya ,  Prakash Easwaran

IPC分类号： G05F1/10

CPC分类号： G05F1/565 ,  G05F1/575

摘要： A voltage regulator includes an amplifier, a first buffer and a second buffer. The amplifier is designed to generate an error voltage between a reference voltage and a voltage at an output node of the voltage regulator. The first buffer is coupled to receive the amplified error voltage and, in response, to drive a first pass transistor. The first buffer includes a non-linear resistance element. The resistance of the non-linear resistance element varies non-linearly with a load current drawn from the output node. The second buffer is coupled to receive the amplified error voltage, and in response, to drive a second pass transistor. The second buffer includes a linear resistance element. The resistance of the linear element is a constant. The use of the non-linear resistance element enables reduction in power consumption in the voltage regulator.

摘要翻译： 电压调节器包括放大器，第一缓冲器和第二缓冲器。 放大器设计用于在电压调节器的输出节点处产生参考电压和电压之间的误差电压。 第一缓冲器被耦合以接收放大的误差电压，并且作为响应来驱动第一传输晶体管。 第一缓冲器包括非线性电阻元件。 非线性电阻元件的电阻随从输出节点引出的负载电流而非线性变化。 第二缓冲器被耦合以接收放大的误差电压，并且响应于驱动第二传输晶体管。 第二缓冲器包括线性电阻元件。 线性元件的电阻是一个常数。 使用非线性电阻元件能够降低电压调节器的功耗。