公开(公告)号：US08049472B2

公开(公告)日：2011-11-01

申请号：US12463388

申请日：2009-05-09

Applicant: Prakash Easwaran ,  Rupak Ghayal ,  Raghavendra Rao Haresamudram

Inventor： Prakash Easwaran ,  Rupak Ghayal ,  Raghavendra Rao Haresamudram

IPC: G05F1/577

CPC classification number: H02M3/158 ,  H02M2001/009

Abstract: Single inductor multiple output (SIMO) switching devices with efficient regulating circuits. The SIMO switching device includes a plurality of time division multiplexing (TDM) switches for switching current through an inductor of the SIMO switching device. The plurality of TDM switches produces a plurality of outputs. The SIMO switching device further includes an error calculation circuit operatively coupled to the plurality of outputs for determining a calculated error from the plurality of outputs; a time slot generation circuit for controlling the plurality of TDM switches according to the calculated error; and a pulse width modulation (PWM) control circuit operatively coupled to the time slot generation circuit for controlling a plurality of PWM switches of a switching stage of the SIMO switching device in a continuous conduction mode (CCM) of operation. The PWM switches are controlled according to the time slots generated by the time slot generation circuit.

Abstract translation: 具有高效调节电路的单电感多输出（SIMO）开关器件。 SIMO切换装置包括用于切换通过SIMO切换装置的电感器的电流的多个时分复用（TDM）开关。 多个TDM交换机产生多个输出。 SIMO切换装置还包括可操作地耦合到多个输出的误差计算电路，用于从多个输出中确定计算出的误差; 时隙生成电路，用于根据计算出的误差来控制多个TDM交换机; 以及可操作地耦合到所述时隙产生电路的脉冲宽度调制（PWM）控制电路，用于在连续导通模式（CCM）中控制所述SIMO开关器件的开关级的多个PWM开关。 PWM开关根据时隙发生电路产生的时隙进行控制。

公开(公告)号：US07570191B2

公开(公告)日：2009-08-04

申请号：US11760778

申请日：2007-06-10

Applicant: Prakash Easwaran ,  Prasun Kali Bhattacharya ,  Venkatesh Teeka Srinivasa Shetty

Inventor： Prakash Easwaran ,  Prasun Kali Bhattacharya ,  Venkatesh Teeka Srinivasa Shetty

IPC: H03M1/38

CPC classification number: H03M1/0604 ,  H03M1/168

Abstract: Methods and systems for designing a high resolution analog to digital converter (ADC) by eliminating the errors in the ADC stages. An error correction architecture and method eliminate the gain error and settling error of the residue amplifier in a pipelined ADC stage. A reference voltage error correction architecture and method eliminate the reference voltage error due to the sampling action in the ADC. The gain error correction method calculates the gain error using an error amplifier and eliminates the gain error at a later stage of the ADC. The reference voltage error correction method calculates the reference voltage error using an ideal reference voltage and corrects the error at a later stage of the ADC. Therefore, the constraints of gain and settling of the residue amplifier is significantly reduced.

Abstract translation: 通过消除ADC阶段的错误来设计高分辨率模数转换器（ADC）的方法和系统。 错误校正架构和方法消除了流水线ADC阶段的残差放大器的增益误差和稳定误差。 参考电压误差校正架构和方法消除了ADC中采样动作引起的参考电压误差。 增益误差校正方法使用误差放大器计算增益误差，消除ADC后期的增益误差。 参考电压误差校正方法使用理想的参考电压计算参考电压误差，并在ADC后期校正误差。 因此，残差放大器的增益和稳定的约束显着降低。

公开(公告)号：US08106706B2

公开(公告)日：2012-01-31

申请号：US12463390

申请日：2009-05-09

Applicant: Prakash Easwaran ,  Prasenjit Bhowmik ,  Sumeet Mathur

Inventor： Prakash Easwaran ,  Prasenjit Bhowmik ,  Sumeet Mathur

IPC: G05F1/10 ,  G05F3/02

CPC classification number: G05F3/26 ,  H03F1/301

Abstract: A method for biasing a MOS transistor includes AC coupling an input signal from an amplifier stage to a gate of the MOS transistor. The method includes connecting a pair of diodes in an opposing parallel configuration to a bias transistor and a current source. Further, the method includes generating a DC bias voltage through the bias transistor and the current source. The method also includes clamping the voltage at drain of the bias transistor to a fixed voltage by a clamping circuit. Further, the method includes coupling the DC bias voltage to the gate of the MOS transistor through the pair of diodes.

Abstract translation: 用于偏置MOS晶体管的方法包括将来自放大器级的输入信号AC耦合到MOS晶体管的栅极。 该方法包括将一对相反并联配置的二极管连接到偏置晶体管和电流源。 此外，该方法包括通过偏置晶体管和电流源产生DC偏置电压。 该方法还包括通过钳位电路将偏置晶体管的漏极处的电压钳位到固定电压。 此外，该方法包括通过一对二极管将DC偏置电压耦合到MOS晶体管的栅极。

公开(公告)号：US20100283439A1

公开(公告)日：2010-11-11

申请号：US12463385

申请日：2009-05-09

Applicant: Saumitra Singh ,  Rupak Ghayal ,  Chakravarthy Srinivasan ,  Prakash Easwaran

Inventor： Saumitra Singh ,  Rupak Ghayal ,  Chakravarthy Srinivasan ,  Prakash Easwaran

IPC: G05F1/10 ,  H03K3/00

CPC classification number: H03K17/102 ,  H02M1/088

Abstract: Efficient switch cascode architecture for switching devices, such as switching regulators. The cascode architecture includes a switching stage responsive to an external driver signal for switching transitions, and a bias generator operative to bias the cascode transistor of the switching stage to protect the switching stage from damage during the switching transitions.

Abstract translation: 用于开关器件（如开关稳压器）的高效开关共源共栅架构。 共源共轭体系结构包括响应于用于切换转换的外部驱动器信号的开关级，以及用于偏置开关级的共源共栅晶体管的偏置发生器，以保护开关级在开关转变期间免受损坏。

公开(公告)号：US20100026267A1

公开(公告)日：2010-02-04

申请号：US12463388

申请日：2009-05-09

Applicant: Prakash EASWARAN ,  Rupak GHAYAL ,  Raghavendra Rao HARESAMUDRAM

Inventor： Prakash EASWARAN ,  Rupak GHAYAL ,  Raghavendra Rao HARESAMUDRAM

IPC: G05F1/10

CPC classification number: H02M3/158 ,  H02M2001/009

Abstract: Single inductor multiple output (SIMO) switching devices with efficient regulating circuits. The SIMO switching device includes a plurality of time division multiplexing (TDM) switches for switching current through an inductor of the SIMO switching device. The plurality of TDM switches produces a plurality of outputs. The SIMO switching device further includes an error calculation circuit operatively coupled to the plurality of outputs for determining a calculated error from the plurality of outputs; a time slot generation circuit for controlling the plurality of TDM switches according to the calculated error; and a pulse width modulation (PWM) control circuit operatively coupled to the time slot generation circuit for controlling a plurality of PWM switches of a switching stage of the SIMO switching device in a continuous conduction mode (CCM) of operation. The PWM switches are controlled according to the time slots generated by the time slot generation circuit.

Abstract translation: 具有高效调节电路的单电感多输出（SIMO）开关器件。 SIMO切换装置包括用于切换通过SIMO切换装置的电感器的电流的多个时分复用（TDM）开关。 多个TDM交换机产生多个输出。 SIMO切换装置还包括可操作地耦合到多个输出的误差计算电路，用于从多个输出中确定计算出的误差; 时隙生成电路，用于根据计算出的误差来控制多个TDM交换机; 以及可操作地耦合到所述时隙产生电路的脉冲宽度调制（PWM）控制电路，用于在连续导通模式（CCM）中控制所述SIMO开关器件的开关级的多个PWM开关。 PWM开关根据时隙发生电路产生的时隙进行控制。

公开(公告)号：US07538701B2

公开(公告)日：2009-05-26

申请号：US11760746

申请日：2007-06-09

Applicant: Venkatesh Teeka Srinivasa Shetty ,  Chandrashekar Lakshminarayanan ,  Prasun Kali Bhattacharya ,  Prasenjit Bhowmik ,  Srinivasan Chakravarthy ,  Mukesh Khatri ,  Sanjeeb Kumar Ghosh ,  Sumanth Chakkirala ,  Sundararajan Krishnan ,  Prakash Easwaran

Inventor： Venkatesh Teeka Srinivasa Shetty ,  Chandrashekar Lakshminarayanan ,  Prasun Kali Bhattacharya ,  Prasenjit Bhowmik ,  Srinivasan Chakravarthy ,  Mukesh Khatri ,  Sanjeeb Kumar Ghosh ,  Sumanth Chakkirala ,  Sundararajan Krishnan ,  Prakash Easwaran

IPC: H03M1/20

CPC classification number: H03M1/0641 ,  H03M1/12

Abstract: A system and method for improving the dynamic performance in an analog-to-digital converter (ADC) by randomizing the differential mismatch. The differential mismatch in an input analog signal is randomized by flipping the input signal and output signal randomly.

Abstract translation: 一种通过随机化差分失配来改善模数转换器（ADC）中的动态性能的系统和方法。 通过随机翻转输入信号和输出信号，输入模拟信号的差分失配被随机化。

公开(公告)号：US08598860B2

公开(公告)日：2013-12-03

申请号：US13249584

申请日：2011-09-30

Applicant: Hrishikesh Bhagwat ,  Rupak Ghayal ,  Saumitra Singh ,  Pawan Gupta ,  Prakash Easwaran

Inventor： Hrishikesh Bhagwat ,  Rupak Ghayal ,  Saumitra Singh ,  Pawan Gupta ,  Prakash Easwaran

IPC: G05F1/00

CPC classification number: H02M3/1588 ,  Y02B70/1466

Abstract: A transient recovery circuit for switching devices. The transient recovery circuit includes a detecting circuit for detecting a rapid transient in an output voltage of a switching device by detecting a rate of the output voltage transient; an auxiliary controlling circuit in a feedback loop of the switching device for correcting the output voltage by changing a bandwidth of the feedback loop if the rapid transient is detected; and an initializing circuit for initializing the feedback loop to expected operating points in a continuous conduction mode after correcting the output voltage.

Abstract translation: 用于开关器件的瞬态恢复电路。 瞬态恢复电路包括检测电路，用于通过检测输出电压瞬变的速率来检测开关装置的输出电压中的快速瞬变; 所述开关装置的反馈环路中的辅助控制电路，用于通过在检测到所述快速瞬变时改变所述反馈回路的带宽来校正所述输出电压; 以及用于在校正输出电压之后将连续导通模式中的反馈回路初始化为期望工作点的初始化电路。

公开(公告)号：US20130021094A1

公开(公告)日：2013-01-24

申请号：US13009869

申请日：2011-01-20

Applicant: Prasun Kali BHATTACHARYYA ,  Sumanth Chakkirala

Inventor： Prasun Kali BHATTACHARYYA ,  Sumanth Chakkirala

IPC: H03F3/68 ,  H03F3/20

CPC classification number: H03F1/0277 ,  H03F2200/393

Abstract: 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.

Abstract translation: 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状态和第二负载状态期间工作。 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：US20120299580A1

公开(公告)日：2012-11-29

申请号：US13249584

申请日：2011-09-30

Applicant: Hrishikesh BHAGWAT ,  Rupak Ghayal ,  Saumitra Singh ,  Pawan Gupta ,  Prakash Easwaran

Inventor： Hrishikesh BHAGWAT ,  Rupak Ghayal ,  Saumitra Singh ,  Pawan Gupta ,  Prakash Easwaran

IPC: G01R19/165

CPC classification number: H02M3/1588 ,  Y02B70/1466

Abstract: A transient recovery circuit for switching devices. The transient recovery circuit includes a detecting circuit for detecting a rapid transient in an output voltage of a switching device by detecting a rate of the output voltage transient; an auxiliary controlling circuit in a feedback loop of the switching device for correcting the output voltage by changing a bandwidth of the feedback loop if the rapid transient is detected; and an initializing circuit for initializing the feedback loop to expected operating points in a continuous conduction mode after correcting the output voltage.

Abstract translation: 用于开关器件的瞬态恢复电路。 瞬态恢复电路包括检测电路，用于通过检测输出电压瞬变的速率来检测开关装置的输出电压中的快速瞬变; 所述开关装置的反馈环路中的辅助控制电路，用于通过在检测到所述快速瞬变时改变所述反馈回路的带宽来校正所述输出电压; 以及用于在校正输出电压之后将连续导通模式中的反馈回路初始化为期望工作点的初始化电路。

公开(公告)号：US08237422B2

公开(公告)日：2012-08-07

申请号：US12463385

申请日：2009-05-09

Applicant: Saumitra Singh ,  Rupak Ghayal ,  Chakravarthy Srinivasan ,  Prakash Easwaran

Inventor： Saumitra Singh ,  Rupak Ghayal ,  Chakravarthy Srinivasan ,  Prakash Easwaran

IPC: G05F1/10

CPC classification number: H03K17/102 ,  H02M1/088

Abstract: Efficient switch cascode architecture for switching devices, such as switching regulators. The cascode architecture includes a switching stage responsive to an external driver signal for switching transitions, and a bias generator operative to bias the cascode transistor of the switching stage to protect the switching stage from damage during the switching transitions.

Abstract translation: 用于开关器件（如开关稳压器）的高效开关共源共栅架构。 共源共轭体系结构包括响应于用于切换转换的外部驱动器信号的开关级，以及用于偏置开关级的共源共栅晶体管的偏置发生器，以保护开关级在开关转变期间免受损坏。