公开(公告)号：US20100327928A1

公开(公告)日：2010-12-30

申请号：US12492252

申请日：2009-06-26

申请人： Huijuan Li ,  Abidur Rahman ,  Chienyu Huang

发明人： Huijuan Li ,  Abidur Rahman ,  Chienyu Huang

IPC分类号： H03K5/12

CPC分类号： H03K17/163

摘要： A circuit for independently controlling slew and propagation delay of a current DAC is provided. The circuit applies dual slope technique with feed-back control the gate (or control electrode) of a switching transistor to make propagation delay independent control from rise/fall slew rate. This allows one to adjust propagation delay and current slew rate separately to achieve better performance.

摘要翻译： 提供了用于独立控制电流DAC的转换和传播延迟的电路。 该电路采用双斜率技术，反馈控制开关晶体管的栅极（或控制电极），使传播延迟独立于上升/下降转换速率控制。 这样可以分别调整传播延迟和电流转换速率，以达到更好的性能。

公开(公告)号：US08143812B2

公开(公告)日：2012-03-27

申请号：US12491609

申请日：2009-06-25

申请人： Chienyu Huang ,  Abidur Rahman ,  Huijuan Li

发明人： Chienyu Huang ,  Abidur Rahman ,  Huijuan Li

IPC分类号： H05B37/02

CPC分类号： H03K17/08122 ,  H05B33/0827 ,  H05B33/0887 ,  Y02B20/341

摘要： An output stage for an LED driver is provided. In particular, a low voltage clamp, which uses several cascode circuits, is provided to protect low voltage switching transistors in the range of two times higher voltage application under both normal and fault conditions. Additionally, a circuit for regulating the bias voltage applied to each of the cascode circuits is provided to prevent damage during startup, while an internal voltage regulator is settling.

摘要翻译： 提供了一种用于LED驱动器的输出级。 特别地，提供了使用几个共源共栅电路的低电压钳位电路，以在正常和故障条件下保护两倍于更高电压应用范围内的低电压开关晶体管。 此外，提供用于调节施加到每个共源共栅电路的偏置电压的电路，以在内部稳压器稳定期间防止启动期间的损坏。

公开(公告)号：US07928784B2

公开(公告)日：2011-04-19

申请号：US12492252

申请日：2009-06-26

申请人： Huijuan Li ,  Abidur Rahman ,  Chienyu Huang

发明人： Huijuan Li ,  Abidur Rahman ,  Chienyu Huang

IPC分类号： H03K5/12

CPC分类号： H03K17/163

摘要： A circuit for independently controlling slew and propagation delay of a current DAC is provided. The circuit applies dual slope technique with feed-back control the gate (or control electrode) of a switching transistor to make propagation delay independent control from rise/fall slew rate. This allows one to adjust propagation delay and current slew rate separately to achieve better performance.

摘要翻译： 提供了用于独立控制电流DAC的转换和传播延迟的电路。 该电路采用双斜率技术，反馈控制开关晶体管的栅极（或控制电极），使传播延迟独立于上升/下降转换速率控制。 这样可以分别调整传播延迟和电流转换速率，以达到更好的性能。

公开(公告)号：US20100327777A1

公开(公告)日：2010-12-30

申请号：US12491609

申请日：2009-06-25

申请人： Chienyu Huang ,  Abidur Rahman ,  Huijuan Li

发明人： Chienyu Huang ,  Abidur Rahman ,  Huijuan Li

IPC分类号： H05B37/02 ,  H03K5/08

CPC分类号： H03K17/08122 ,  H05B33/0827 ,  H05B33/0887 ,  Y02B20/341

摘要： An output stage for an LED driver is provided. In particular, a low voltage clamp, which uses several cascode circuits, is provided to protect low voltage switching transistors in the range of two times higher voltage application under both normal and fault conditions. Additionally, a circuit for regulating the bias voltage applied to each of the cascode circuits is provided to prevent damage during startup, while an internal voltage regulator is settling.

摘要翻译： 提供了一种用于LED驱动器的输出级。 特别地，提供了使用几个共源共栅电路的低电压钳位电路，以在正常和故障条件下保护两倍于更高电压应用范围内的低电压开关晶体管。 此外，提供用于调节施加到每个共源共栅电路的偏置电压的电路，以在内部稳压器稳定期间防止启动期间的损坏。

公开(公告)号：US20090134856A1

公开(公告)日：2009-05-28

申请号：US11986775

申请日：2007-11-26

申请人： Abidur Rahman ,  Huijuan Li ,  Brett E. Smith ,  Zheng Li

发明人： Abidur Rahman ,  Huijuan Li ,  Brett E. Smith ,  Zheng Li

IPC分类号： G06F1/10 ,  G01R19/00

CPC分类号： G01R19/0092 ,  H02M3/158 ,  H02M2001/0009

摘要： In a method and system for sensing current in a switching regulator (SWR) operating in a current mode, a power switch is coupled to receive the current from a switching element, the power switch being controlled by a gate signal. An inrush of the current causes an initial transient spike (ITS). A buffer having a buffer input and a buffer output is coupled to receive the gate signal and provide a buffered gate signal. The buffer output is disabled during the ITS. A sense switch (SW) is coupled to receive a portion of the current from the switching element, the SW being turned on by the buffered gate signal after the initial transient spike. A sense resistor (SR) is coupled to receive the portion of the current from the SW. An amplifier converts the portion of the current through the SR to a voltage signal for controlling the SWR.

摘要翻译： 在用于感测以当前模式工作的开关调节器（SWR）中的电流的方法和系统中，电源开关被耦合以从开关元件接收电流，功率开关由门信号控制。 电流的浪涌导致初始瞬态尖峰（ITS）。 具有缓冲器输入和缓冲器输出的缓冲器被耦合以接收栅极信号并提供缓冲的栅极信号。 缓冲区输出在ITS期间被禁用。 感测开关（SW）被耦合以从开关元件接收电流的一部分，在初始瞬态尖峰之后，SW被缓冲的栅极信号导通。 耦合感测电阻器（SR）以从SW接收电流的一部分。 放大器将通过SR的电流的一部分转换成用于控制SWR的电压信号。

公开(公告)号：US08854064B2

公开(公告)日：2014-10-07

申请号：US13184292

申请日：2011-07-15

申请人： Sualp Aras ,  Tatsuyuki Nihei ,  Abidur Rahman

发明人： Sualp Aras ,  Tatsuyuki Nihei ,  Abidur Rahman

IPC分类号： G01R27/26 ,  G01R27/28 ,  G06F3/041 ,  G01F7/00 ,  H03M11/02 ,  H03M3/00 ,  G01D5/24 ,  G06F3/044 ,  G01P15/125

CPC分类号： G06F3/044 ,  G01D5/24 ,  G01P15/125 ,  H03M3/34 ,  H03M3/458 ,  H03M11/02

摘要： A method for measuring for generating a touch capacitance measurement is provided. Gain and offset control signals are generated, where the gain and offset control signals are adjusted to compensate for base capacitance of a touch sensor. The gain control signal is applied to a touch sensor during a first phase of a clock signal, and the offset control signal is applied to an output circuit during a second phase of the clock signal. The output circuit is coupled to the touch sensor during the second phase of the clock signal. The touch capacitance measurement is generated by compensating for the base capacitance with the gain and offset control signals, and a gain is applied to the touch capacitance measurement.

摘要翻译： 提供了一种用于产生触摸电容测量的测量方法。 产生增益和偏移控制信号，其中调整增益和偏移控制信号以补偿触摸传感器的基极电容。 在时钟信号的第一阶段期间，将增益控制信号施加到触摸传感器，并且在时钟信号的第二阶段期间将偏移控制信号施加到输出电路。 输出电路在时钟信号的第二阶段耦合到触摸传感器。 通过利用增益和偏移控制信号补偿基极电容来产生触摸电容测量，并且对触摸电容测量应用增益。

公开(公告)号：US08552898B2

公开(公告)日：2013-10-08

申请号：US13341501

申请日：2011-12-30

申请人： Jim Kien Huy Le ,  Abidur Rahman

发明人： Jim Kien Huy Le ,  Abidur Rahman

IPC分类号： H03M1/78

CPC分类号： H03M1/0863 ,  H03M1/765

摘要： A circuit has a digital to analog (DA) resistance ladder having an analog output; a capacitor coupled to the analog output; a first resistance coupled from the capacitor to ground; and a switch coupled to the capacitor in parallel to the resistor, wherein the switch, when closed, has a second resistance, and the first resistance is greater than the second resistance.

摘要翻译： 一个电路具有一个具有模拟输出的数模（DA）电阻梯; 耦合到模拟输出的电容器; 从电容器接地的第一个电阻; 以及与所述电阻器并联连接到所述电容器的开关，其中所述开关在闭合时具有第二电阻，并且所述第一电阻大于所述第二电阻。

公开(公告)号：US20130169462A1

公开(公告)日：2013-07-04

申请号：US13341501

申请日：2011-12-30

申请人： Jim Kien Huy Le ,  Abidur Rahman

发明人： Jim Kien Huy Le ,  Abidur Rahman

IPC分类号： H03M1/78

CPC分类号： H03M1/0863 ,  H03M1/765

摘要： A circuit has a digital to analog (DA) resistance ladder having an analog output; a capacitor coupled to the analog output; a first resistance coupled from the capacitor to ground; and a switch coupled to the capacitor in parallel to the resistor, wherein the switch, when closed, has a second resistance, and the first resistance is greater than the second resistance.

摘要翻译： 一个电路具有一个具有模拟输出的数模（DA）电阻梯; 耦合到模拟输出的电容器; 从电容器接地的第一个电阻; 以及与所述电阻器并联连接到所述电容器的开关，其中所述开关在闭合时具有第二电阻，并且所述第一电阻大于所述第二电阻。

公开(公告)号：US20110278936A1

公开(公告)日：2011-11-17

申请号：US12779418

申请日：2010-05-13

申请人： Abidur Rahman ,  Xiaochun Zhao

发明人： Abidur Rahman ,  Xiaochun Zhao

IPC分类号： H02J1/00

CPC分类号： G05F1/56 ,  Y10T307/50 ,  Y10T307/696

摘要： Generally, with low drop out (LDO) regulators that use multiplexed power supplies, the transistors within the regulator can use a substantial amount of area. Here, a regulator is provided that uses a multiplexer to commonly control the back-gates of multiple power transistors within the LDO. By doing this, the area overhead that would normally be present with these switches (of the multiplexer) can be dramatically reduced without sacrificing performance.

摘要翻译： 通常，使用复用电源的低压差（LDO）调节器，调节器内的晶体管可以使用大量的面积。 这里提供了一种调节器，其使用多路复用器来共同控制LDO内多个功率晶体管的背栅。 通过这样做，可以显着减少这些开关（多路复用器）通常存在的区域开销，而不会牺牲性能。

公开(公告)号：US07035071B1

公开(公告)日：2006-04-25

申请号：US11025706

申请日：2004-12-29

申请人： Kee Chee Tiew ,  Thomas A. Schmidt ,  Brett E. Smith ,  John C. Vogt ,  Abidur Rahman

发明人： Kee Chee Tiew ,  Thomas A. Schmidt ,  Brett E. Smith ,  John C. Vogt ,  Abidur Rahman

IPC分类号： H02H9/08

CPC分类号： H02M3/157 ,  H02H9/025

摘要： A switching regulator having a current limit with adaptive cycle skipping. A buck type switching regulator circuit is provided, including an energy storage component, such as an inductor or capacitor, and a switch for controllably providing an input current to the energy storage component. A control unit controls the on time and the off time of the switch by providing cyclically recurring control pulses to the switch that cause the switch to be on during the pulses and off otherwise. A current monitor circuit monitors a current corresponding to the input current applied to the energy storage component during the periodic control pulses. An overcurrent signal generator generates an overcurrent signal pulse upon detection of the monitored current at a level above a predetermined level corresponding to an overcurrent condition. A state machine responds to the overcurrent signal pulse and suppresses a number of the cyclically recurring control pulses, thereby controlling the period between the recurring control pulses that are not suppressed, in accordance with a predetermined algorithm that increases the number each time an overcurrent signal pulse is detected in successive periods.

摘要翻译： 具有适应性循环跳跃的电流限制的开关调节器。 提供一种降压型开关调节器电路，其包括诸如电感器或电容器的能量存储部件，以及用于可控地向能量存储部件提供输入电流的开关。 控制单元通过向开关提供周期性重复的控制脉冲来控制开关的导通时间和关断时间，使得开关在脉冲期间导通，否则为关闭。 电流监视电路在周期性控制脉冲期间监视与施加到能量存储部件的输入电流相对应的电流。 过电流信号发生器在检测到超过对应于过电流条件的预定电平的电平的监视电流时产生过电流信号脉冲。 状态机响应过电流信号脉冲并且抑制多个周期性循环控制脉冲，从而根据每次过电流信号脉冲增加数量的预定算法来控制未被抑制的循环控制脉冲之间的周期 在连续的时期内被检测到。