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：US08531056B2

公开(公告)日：2013-09-10

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： H02J1/10

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：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：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：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：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。

公开(公告)号：US20100164528A1

公开(公告)日：2010-07-01

申请号：US12345419

申请日：2008-12-29

申请人： Abidur Rahman ,  Chris Vogel

发明人： Abidur Rahman ,  Chris Vogel

IPC分类号： G01R31/26 ,  H02H3/08

CPC分类号： G01R31/2621 ,  G01R1/36 ,  G01R35/005

摘要： Methods and apparatus to test electronic devices are disclosed. An example method includes setting a first controlled switch to prevent a current detect signal from tripping an overcurrent protection event controlling an operation of the device; setting a second controlled switch to route a first sensed voltage associated with the device to a voltage adjuster; sending a calibration current corresponding to a target threshold current through the device; detecting the first sensed voltage while the calibration current flows through the device; and setting a reference signal substantially equal to the first sensed voltage, wherein the reference signal is to be used to generate the current detect signal.

摘要翻译： 公开了测试电子设备的方法和装置。 一种示例性方法包括设置第一受控开关以防止电流检测信号跳过控制装置的操作的过电流保护事件; 设置第二控制开关以将与所述装置相关联的第一感测电压路由到电压调节器; 通过所述设备发送对应于目标阈值电流的校准电流; 当所述校准电流流过所述装置时检测所述第一感测电压; 以及设置基本上等于所述第一检测电压的参考信号，其中所述参考信号用于产生所述电流检测信号。

公开(公告)号：US07560972B1

公开(公告)日：2009-07-14

申请号：US12021939

申请日：2008-01-29

申请人： Kee Chee Tiew ,  Brett Smith ,  Abidur Rahman

发明人： Kee Chee Tiew ,  Brett Smith ,  Abidur Rahman

IPC分类号： H03L5/00

CPC分类号： H03K19/01721 ,  H03K3/35613

摘要： Methods and apparatus to reduce propagation delay of circuits are disclosed. A disclosed apparatus to reduce propagation delay of a circuit comprises a level shifter to selectively turn a first circuit on and off; a first switch to couple the first circuit to a second circuit when the first circuit is on, wherein the second circuit is to selectively receive a first current from the first circuit based on a signal the second circuit receives from the level shifter; and a second switch to couple the first circuit to a reference signal based on the first current, the second switch causing the first circuit to start to turn off.

摘要翻译： 公开了减少电路传播延迟的方法和装置。 所公开的减小电路传播延迟的设备包括：电平移位器，用于选择性地使第一电路接通和断开; 第一开关，用于当第一电路接通时将第一电路耦合到第二电路，其中第二电路基于第二电路从电平转换器接收到的信号，选择性地接收来自第一电路的第一电流; 以及第二开关，其基于所述第一电流将所述第一电路耦合到参考信号，所述第二开关使所述第一电路开始关断。

公开(公告)号：US20070080708A1

公开(公告)日：2007-04-12

申请号：US11239021

申请日：2005-09-29

申请人： Shanmuganand Chellamuthu ,  Brett Smith ,  Thomas Schmidt ,  Abidur Rahman

发明人： Shanmuganand Chellamuthu ,  Brett Smith ,  Thomas Schmidt ,  Abidur Rahman

IPC分类号： H03K19/003

CPC分类号： H03K19/0013 ,  H03K17/223

摘要： 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.

摘要翻译： 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。