公开(公告)号：US07236003B2

公开(公告)日：2007-06-26

申请号：US11239021

申请日：2005-09-29

Applicant: Shanmuganand Chellamuthu ,  Brett E. Smith ,  Thomas A. Schmidt ,  Abidur Rahman

Inventor： Shanmuganand Chellamuthu ,  Brett E. Smith ,  Thomas A. Schmidt ,  Abidur Rahman

IPC: H03K19/007

CPC classification number: H03K19/0013 ,  H03K17/223

Abstract: The H-bridge circuit with shoot through current prevention during power-up includes: a high side transistor; a low side transistor coupled in series with the high side transistor; pull down devices coupled to a control node of the high side transistor and to a control node of the low side transistor; and wherein the pull down devices are controlled by a pull down circuit including a Power On Reset circuit, monitoring the digital power supply such that the high side and low side transistors are OFF until the digital power supply has settled to a desired operating voltage.

公开(公告)号：US20090201001A1

公开(公告)日：2009-08-13

申请号：US12335164

申请日：2008-12-15

Applicant: Shanmuganand Chellamuthu ,  James R. Hellums

Inventor： Shanmuganand Chellamuthu ,  James R. Hellums

IPC: G05F1/10

CPC classification number: H02M3/157 ,  H02M2001/0025

Abstract: A switching mode power supply utilizing an analog sampled data system in the feedback control loop in which the coefficients of the sampled data system are change by reprogramming a programmable nonvolatile memory when external LC values vary.

Abstract translation: 一种利用反馈控制回路中的模拟采样数据系统的开关模式电源，其中当外部LC值变化时，通过重新编程可编程非易失性存储器来改变采样数据系统的系数。

公开(公告)号：US20070229151A1

公开(公告)日：2007-10-04

申请号：US11694081

申请日：2007-03-30

Applicant: Luthuli Dake ,  Rex Teggatz ,  Shanmuganand Chellamuthu

Inventor： Luthuli Dake ,  Rex Teggatz ,  Shanmuganand Chellamuthu

IPC: G05F1/10

CPC classification number: G05F3/26

Abstract: The voltage matching circuit includes: a first branch including a first transistor; a second branch including a second transistor; and a cascaded level shifter coupled between the first and second branches to match a voltage on the first transistor with a voltage on the second transistor.

Abstract translation: 电压匹配电路包括：第一分支，包括第一晶体管; 包括第二晶体管的第二分支; 以及耦合在所述第一和第二分支之间以将所述第一晶体管上的电压与所述第二晶体管上的电压相匹配的级联电平移位器。

公开(公告)号：US07982447B2

公开(公告)日：2011-07-19

申请号：US12335255

申请日：2008-12-15

Applicant: Shanmuganand Chellamuthu ,  James A. Kohout ,  Luthuli E. Dake

Inventor： Shanmuganand Chellamuthu ,  James A. Kohout ,  Luthuli E. Dake

IPC: G05F1/40

CPC classification number: H02M3/156

Abstract: A switched mode power supply has a high side switching transistor coupled between a voltage source and a load for generating the output voltage at the load. A driver circuit drives the high side switching transistor. A first resistor divider is coupled to the output voltage and has a first tap. An error amplifier has a first input coupled to the first tap and a compensated feedback loop. A second resistor divider is coupled to the output voltage and has a second tap, resistance of the second resistor divider being less than resistance of the first resistor divider. A switch is coupled to the second tap and to the first input of the error amplifier for connecting the second tap to the first input of the error amplifier when the output voltage of the switched mode power supply reaches a first predetermined voltage.

Abstract translation: 开关模式电源具有耦合在电压源和用于在负载下产生输出电压的负载之间的高侧开关晶体管。 驱动电路驱动高侧开关晶体管。 第一电阻分压器耦合到输出电压并且具有第一抽头。 误差放大器具有耦合到第一抽头的第一输入和经补偿的反馈回路。 第二电阻分压器耦合到输出电压并具有第二抽头，第二电阻分压器的电阻小于第一电阻分压器的电阻。 当开关模式电源的输出电压达到第一预定电压时，开关耦合到第二抽头和误差放大器的第一输入端，用于将第二抽头连接到误差放大器的第一输入端。

公开(公告)号：US20090206810A1

公开(公告)日：2009-08-20

申请号：US12335255

申请日：2008-12-15

Applicant: Shanmuganand Chellamuthu ,  James A. Kohout ,  Luthuli E. Dake

Inventor： Shanmuganand Chellamuthu ,  James A. Kohout ,  Luthuli E. Dake

IPC: G05F1/10

CPC classification number: H02M3/156

Abstract: A switched mode power supply has a high side switching transistor coupled between a voltage source and a load for generating the output voltage at the load. A driver circuit drives the high side switching transistor. A first resistor divider is coupled to the output voltage and has a first tap. An error amplifier has a first input coupled to the first tap and a compensated feedback loop. A second resistor divider is coupled to the output voltage and has a second tap, resistance of the second resistor divider being less than resistance of the first resistor divider. A switch is coupled to the second tap and to the first input of the error amplifier for connecting the second tap to the first input of the error amplifier when the output voltage of the switched mode power supply reaches a first predetermined voltage.

Abstract translation: 开关模式电源具有耦合在电压源和用于在负载下产生输出电压的负载之间的高侧开关晶体管。 驱动电路驱动高侧开关晶体管。 第一电阻分压器耦合到输出电压并且具有第一抽头。 误差放大器具有耦合到第一抽头的第一输入和经补偿的反馈回路。 第二电阻分压器耦合到输出电压并具有第二抽头，第二电阻分压器的电阻小于第一电阻分压器的电阻。 当开关模式电源的输出电压达到第一预定电压时，开关耦合到第二抽头和误差放大器的第一输入端，用于将第二抽头连接到误差放大器的第一输入端。

公开(公告)号：US20080136382A1

公开(公告)日：2008-06-12

申请号：US11567481

申请日：2006-12-06

Applicant: Shanmuganand Chellamuthu ,  Md Abidur Rahman ,  Luthuli Edem Dake

Inventor： Shanmuganand Chellamuthu ,  Md Abidur Rahman ,  Luthuli Edem Dake

IPC: G05F1/00

CPC classification number: G05F1/468 ,  H02M1/36 ,  H02M3/156

Abstract: The reference voltage generator for a switch mode regulator includes: a reference voltage source; a soft-start voltage generator; and a comparator having a directional offset for comparing an output of the reference voltage source with an output of the soft-start voltage generator. Because of the intentional directional offset, the pass switch does not turn ON during the transition from the ramp voltage to reference voltage, therefore reducing energy stored in the inductor. Thus the voltage overshoot is reduced during the end of the soft-start cycle.

Abstract translation: 用于开关模式调节器的参考电压发生器包括：参考电压源; 软启动电压发生器; 以及具有用于将参考电压源的输出与软启动电压发生器的输出进行比较的方向偏移的比较器。 由于有意的方向偏移，在从斜坡电压转换到参考电压时，通过开关不会导通，因此减少了存储在电感中的能量。 因此，在软启动周期结束时，电压过冲减小。

公开(公告)号：US20070080708A1

公开(公告)日：2007-04-12

申请号：US11239021

申请日：2005-09-29

Applicant: Shanmuganand Chellamuthu ,  Brett Smith ,  Thomas Schmidt ,  Abidur Rahman

Inventor： Shanmuganand Chellamuthu ,  Brett Smith ,  Thomas Schmidt ,  Abidur Rahman

IPC: H03K19/003

CPC classification number: H03K19/0013 ,  H03K17/223

Abstract: The H-bridge circuit with shoot through current prevention during power-up includes: a high side transistor; a low side transistor coupled in series with the high side transistor; pull down devices coupled to a control node of the high side transistor and to a control node of the low side transistor; and wherein the pull down devices are controlled by a pull down circuit including a Power On Reset circuit, monitoring the digital power supply such that the high side and low side transistors are OFF until the digital power supply has settled to a desired operating voltage.

Abstract translation: 上电期间具有防止穿透电流的H桥电路包括：高侧晶体管; 与高侧晶体管串联耦合的低侧晶体管; 下拉器件耦合到高侧晶体管的控制节点和低侧晶体管的控制节点; 并且其中下拉器件由包括上电复位电路的下拉电路控制，监视数字电源，使得高侧和低侧晶体管截止，直到数字电源已经稳定到期望的工作电压。

公开(公告)号：US07109697B1

公开(公告)日：2006-09-19

申请号：US11170909

申请日：2005-06-29

Applicant: Amer Hani Atrash ,  Shanmuganand Chellamuthu

Inventor： Amer Hani Atrash ,  Shanmuganand Chellamuthu

IPC: G05F3/16 ,  H03F1/02 ,  H03K1/10

CPC classification number: H03F3/45183 ,  H03F3/45744 ,  H03F3/45766 ,  H03F3/45771 ,  H03F2200/447 ,  H03F2200/453 ,  H03F2200/456 ,  H03F2203/45048 ,  H03F2203/45244 ,  H03F2203/45291 ,  H03F2203/45322 ,  H03F2203/45354 ,  H03F2203/45374 ,  H03F2203/45396 ,  H03F2203/45398 ,  Y10S323/907

Abstract: An operational amplifier having temperature-compensated offset correction. The amplifier includes an operational amplifier circuit, that has a first input field effect transistor (FET) having a gate connected to receive a first input signal, and a second input FET having a gate connected to receive a second input signal, the first and the second input FETs being connected together to receive a first bias current, and also being connected to respective sides of a first current mirror. A correction amplifier circuit is also provided, that has a first correction FET having a gate, and a second correction FET having a gate, the first and the second correction FETs being connected together to receive a second bias current, and also being connected to respective sides of a second current mirror. A resistor is arranged to have a fixed voltage provided across it, one terminal of the resistor being connected to the gate of the first correction FET and the other terminal of the resistor being connected to the gate of the second correction FET. A first bias FET is connected to conduct an “extra” current from the second correction FET that is blocked by the current mirror action from flowing through the second current mirror. A second bias FET is connected in current mirror configuration with the first bias FET to form a third current mirror, and is configured to mirror and scale the current through the first bias FET to a selected one of the first input FET and the second input FET.

Abstract translation: 具有温度补偿偏移校正的运算放大器。 该放大器包括运算放大器电路，其具有连接以接收第一输入信号的栅极的第一输入场效应晶体管（FET）和具有连接以接收第二输入信号的栅极的第二输入FET，第一和第 第二输入FET连接在一起以接收第一偏置电流，并且还连接到第一电流镜的相应侧。 还提供了一种校正放大器电路，其具有具有栅极的第一校正FET和具有栅极的第二校正FET，第一和第二校正FET连接在一起以接收第二偏置电流，并且还连接到相应的 第二电流镜的侧面。 电阻器被布置成具有在其上提供的固定电压，电阻器的一个端子连接到第一校正FET的栅极，并且电阻器的另一端子连接到第二校正FET的栅极。 第一偏置FET被连接以传导来自第二校正FET的“额外”电流，该第二校正FET被当前反射镜作用阻挡而不流过第二电流镜。 第二偏置FET以电流镜配置与第一偏置FET连接以形成第三电流镜，并且被配置为将通过第一偏置FET的电流镜像并缩放到第一输入FET和第二输入FET中选定的一个 。